SY171018
DENTON CREEK DRAINAGE STUDY
PREPARED BY:
HALFF ASSOCIATES, INC.
1201 N. BOWSER RD.
RICHARDSON, TX 75081
PREPARED FOR:
DENTON COUNTY LEVEE IMPROVEMENT DISTRICT NO. 1
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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TABLE OF CONTENTS
EXECUTIVE SUMMARY ........................................................................................................................................... 1
I. INTRODUCTION .................................................................................................................................................. 4
A. Purpose ............................................................................................................................................. 4
B. Study Area ......................................................................................................................................... 4
C. Study Objectives ............................................................................................................................... 5
D. Flooding History ................................................................................................................................ 6
II. WATERSHED DESCRIPTION ................................................................................................................................ 7
A. Data Search and Collection ............................................................................................................... 7
Methods ........................................................................................................................................ 7
Data Sources ................................................................................................................................. 7
B. Field Reconnaissance ........................................................................................................................ 7
C. Geomorpholgy Evaluation ............................................................................................................... 8
Methodology ................................................................................................................................. 8
Stream Condition Assessment ...................................................................................................... 8
Identified Areas of Concern .......................................................................................................... 8
Recommendations ...................................................................................................................... 11
D. Survey .............................................................................................................................................. 11
III. HYDROLOGY ................................................................................................................................................... 12
A. Methodology ................................................................................................................................... 12
Rainfall Data ................................................................................................................................ 12
Drainage Basin Delineation ......................................................................................................... 13
Drainage Area Parameters .......................................................................................................... 14
Channel Routing .......................................................................................................................... 17
Reservoir Routing ........................................................................................................................ 17
B. Results and Concusions ................................................................................................................... 17
Summary of Results .................................................................................................................... 17
Comparison with Effective Discharges ........................................................................................ 19
IV. HYDRAULICS ................................................................................................................................................... 20
A. 1D Steady state Model Development ............................................................................................. 20
Cross Sections ............................................................................................................................. 20
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Denton County Levee Improvement District No. 1
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Stream Reach Layout .................................................................................................................. 20
Manning’s Roughness Coefficients ............................................................................................. 21
Ineffective Areas ......................................................................................................................... 21
Levees ......................................................................................................................................... 21
Lateral Structures ........................................................................................................................ 21
Bridges and Culverts ................................................................................................................... 21
B. 1D/2D Unsteady State Model Development .................................................................................. 22
Model Development ................................................................................................................... 22
Unsteady Flow Data .................................................................................................................... 22
Results ......................................................................................................................................... 23
C. 2D Model Development .................................................................................................................. 26
Model Development ................................................................................................................... 26
Terrain Modification ................................................................................................................... 26
Manning’s n-value ....................................................................................................................... 26
Boundary Conditions ................................................................................................................... 26
Simulation Parameters ................................................................................................................ 27
Model Validation ......................................................................................................................... 27
Results ......................................................................................................................................... 28
V. DEVELOPMENT OF ALTERNATIVES ................................................................................................................... 35
A. Alternatives Analysis ....................................................................................................................... 35
1. Alternative 1- Sediment Trap ...................................................................................................... 35
2. Alternative 2- Old Denton Creek Diversion ................................................................................. 38
3. Desilt Flood Control Channel and Old Denton Creek .................................................................. 39
4. Alternative Summary Comparison .............................................................................................. 40
5. No Action Option ........................................................................................................................ 44
B. Cost Estimates ................................................................................................................................. 44
VI. CONCLUSIONS ................................................................................................................................................ 45
VII. REFERENCES .................................................................................................................................................. 46
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Denton County Levee Improvement District No. 1
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LIST OF TABLES
Table 1: Conceptual Alternative Analysis Summary Table ........................................................................... 2
Table 2.1: Summary of ArcGIS Data .............................................................................................................. 7
Table 3.1: Precipitation for 1- to 500-year Rainfall Events ......................................................................... 12
Table 3.2: Drainage Area Comparison ........................................................................................................ 13
Table 3.3: Land Use ..................................................................................................................................... 14
Table 3.4: Initial and Constant Loss Parameters ......................................................................................... 15
Table 3.5: Drainage Area Parameter Comparison ...................................................................................... 16
Table 3.6: HEC-HMS Discharge Summary ................................................................................................... 18
Table 3.7: 100-Year Discharge Summary .................................................................................................... 19
Table 4.1: Hydraulic Structures ................................................................................................................... 22
Table 4.2: FEMA Water Surface Elevation Comparison .............................................................................. 23
Table 4.3: USACE Water Surface Elevation Comparison............................................................................. 24
Table 4.4: 1-D Steady vs Unsteady Comparison ......................................................................................... 24
Table 4.5: May 2015 Storm Event Calibration ............................................................................................ 27
Table 4.6: iSWM Allowable Velocities for Natural Channels ...................................................................... 28
Table 5.1: Alternative 1 Water Surface Elevation Comparison .................................................................. 37
Table 5.2: Alternative 2 Water Surface Elevations Comparison ................................................................. 39
Table 5.3: FEMA vs Halff 100 Year Comparison .......................................................................................... 44
Table 5.4: FEMA vs Halff 500-Year Comparison.......................................................................................... 44
Table 5.5: USACE vs Halff 100-Year Comparison ........................................................................................ 44
Table 5.6: USACE vs Halff 500-Year Comparison ........................................................................................ 44
Table 5.7: Summary of Cost Estimates ....................................................................................................... 44
LIST OF FIGURES
Location of Proposed Alternatives ................................................................................................................ 3
Figure 1: Project Location ............................................................................................................................. 5
Figure 2.1: Channel Profile Comparison ....................................................................................................... 9
Figure 2.2: Annual Sediment Budget for DCLID-1 ....................................................................................... 10
Figure 4.1: 2-year Existing Velocity Map (River Station 36500 to 34000) .................................................. 29
Figure 4.2: 2-year Existing Velocity Map (River Station 35000 to 31500) .................................................. 30
Figure 4.3: 2-year Existing Velocity Map (River Station 31500 to 28500) .................................................. 30
Figure 4.4: 2-year Existing Velocity Map (River Station 29500 to 28000) .................................................. 31
Figure 4.5: Eroded Levee Toe Downstream of Cottonwood Branch Confluence ....................................... 32
Figure 4.6: Old Denton Creek Deposition (Station 28500) ......................................................................... 32
Figure 4.7: 2-year Existing Velocity Map (River Station 23000 to 20000) .................................................. 33
Figure 4.8: 2-year Existing Velocity Map (River Station 20000 to 17500) .................................................. 34
Figure 4.9: Flood Control Channel Sediment Deposit ................................................................................. 34
Figure 5.1: Proposed Sediment Trap Configuration ................................................................................... 36
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APPENDICES
APPENDIX A – Exhibits
Exhibit 1- Project Area Map
Exhibit 2- Drainage Area Map
Exhibit 3- Flow Change Locations
Exhibit 4- Hydrologic Soils Map
Exhibit 5- Land Use Map
Exhibit 6- Hydraulic Work Maps
Exhibit 7- Revised Existing 2-year Velocity Distribution Map
Exhibit 8- Dredging Limits
Exhibit 9- Alternative 1 Proposed Sediment Trap
Exhibit 10- Alternative 2 Proposed Old Denton Creek Diversion
APPENDIX B – FLUVIAL-GEOMORPHIC ASSESSMENT OF THE DENTON CREEK LEVEE (DCLID No. 1) SEGMENT
OF DENTON CREEK
APPENDIX C – COST ESTIMATES
APPENDIX D – HEC-HMS OUTPUT
APPENDIX E – HEC-RAS OUTPUT
APPENDIX F – HYDROLOGIC PARAMETER CALCULATIONS
APPENDIX G – DIGITAL DATA
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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EXECUTIVE SUMMARY
Denton Creek is a major tributary of the Elm Fork Trinity River in North Central Texas. The headwaters of
the stream are located near Bowie, TX. Denton Creek flows southeasterly through rural areas of
Montague, Wise and Denton Counties. Grapevine Lake, a US Army Corps of Engineers reservoir built
primarily for flood control and water supply, is located on Denton Creek near Grapevine Texas (Tarrant
and Denton Counties). Downstream of Grapevine Lake, Denton Creek flows easterly through urbanized
portions of Tarrant and Dallas County to its confluence with the Elm Fork Trinity River just north of Sandy
Lake Road. Only the lower portion of Denton Creek (below Grapevine Lake) is included in this study.
Over the past decade, significant erosion and sedimentation has been observed in the Denton Creek
channel especially within the Denton County Levee Improvement District No. 1 (DCLID-1). This deposition
is particularly significant in the DCLID-1 flood control channel and has raised concerns about the channel’s
flood capacity, the effect on Base Flood Elevations (BFE), and impact on flood risk for the DCLID-1. Because
of these concerns and Denton Creek flooding that occurred in May and June 2015, the DCLID-1
commissioned this study to identify assess the cause and degree of increased flood risk and to formulate
and evaluate possible solutions to reduce flood risk along the Denton Creek flood control channel.
Field reconnaissance and geomorphology evaluations were performed for this study to determine
locations of significant erosion, the causes of sedimentation, and to determine stable channel design
parameters. Locations of concern were measured and documented in the Fluvial-Geomorphic Assessment
of the Denton County Levee (DCLID No. 1) Segment of Denton Creek completed as part of this study by Dr.
Peter Allen and Dr. John Dunbar of Baylor University, along with Dr. Jeff Arnold of the United States
Department of Agriculture – Agriculture Research Service. Field surveys of existing structures and cross
sections along the channel were performed. Detailed surveys through the DCLID-1 portion of the creek
were conducted using conventional survey techniques as well as sonar equipment for locations along the
creek with deep water to accurately determine the extents of sedimentation along the levee portion.
This study is based on the most recent technical data available for Denton Creek including the existing
hydrologic and hydraulic models obtained from the United States Army Corps of Engineers (USACE)
Corridor Develop Certificate (CDC) study completed in May 2013. Updates were made to these models
to reflect the current conditions of the watershed. Land uses in the Denton Creek watershed below
Grapevine Lake are almost entirely fully-developed. Therefore discharges developed and used for this
study were based on fully developed land uses.
A detailed hydraulic study was performed along Denton Creek for existing conditions by updating the 2013
USACE HEC-RAS model. This included the development of a one-dimensional (1D) steady state, two-
dimensional (2D), and combined 1D/2D unsteady flow HEC River Analysis System (HEC-RAS) models. The
study determined peak water surface elevations for the existing conditions 1-, 2-, 5-, 10-, 25-, 50-, 100-,
and 500-year events. The 1D steady state model was developed to update the fully developed USACE
100- and 500-yr discharges, which incorporate flood releases out of Grapevine Lake during these events.
The 1D/2D unsteady model was developed to evaluate the impacts of flow interactions between Denton
Creek and the Elm Fork. The full 2D model was developed to better evaluate channel and overbank
velocities for the 1-year to the 10-year storm event as well as flow interaction between the DCLID-1 flood
control channel and Old Denton Creek within the DCLID-1.
The Conceptual Level Alternative Analysis focused on proposed improvements within public Right of Way
(R.O.W.) to reduce flood risk and increase channel stability (based on recommendations from the fluvial-
geomorphic assessment). Using the results of the geomorphology evaluation, alternatives were
developed based on stable channel recommendations to address areas of concern due to channel bank
erosion and sedimentation. Several measures were evaluated to provide multiple benefits to the
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surrounding areas while avoiding negative impacts downstream and/or upstream. The conceptual level
alternatives consist of:
• The construction of a sediment trap to capture and control the deposition within a specified area
for easier removal
• The construction of six (6) berms located within the flood control channel to divert low flows to
the Old Denton Creek channel.
• Frequent dredging of the flood control channel and Old Denton Creek channel
Included in all alternatives is the initial dredging of the flood control and old channel, reestablishment of
the toe of the levee upstream of MacArthur Boulevard, and repair of the failed slope located near the
upstream limits of DCLID-1 in the flood control channel. Dredging of the flood control and Old Denton
Creek channel incorporates the recommended stable channel design provided in the Fluvial-Geomorphic
Assessment of the Denton County Levee (DCLID No. 1) Segment of Denton Creek. As part of the Denton
Creek Drainage Study for the City of Coppell a grade control structure located just downstream of Denton
Tap Road was recommended to the City of Coppell to prevent further downcutting along Denton Creek
upstream of Denton Tap Road. This should serve to stabilize the channel through Denton Tap Road and
reduce the sediment supply to downstream reaches of Denton Creek including those at DCLID-1.
Alternative 2 is recommended to restore flow patterns to Old Denton Creek similar to the original design
intent of the 1986 Gateway Reclamation project. This alternative effectively increases velocities by
diverting low flows via the placement of berms in the flood control channel thereby keeping sediment
suspended through the entirety of Denton Creek. Table 1 shows the total conceptual level cost estimates
for each alternative.
Table 1: Conceptual Alternative Analysis Summary Table
Alternative Alternative Description Cost1
1 Sediment Trap $ 28,200,000
2 Restore Flows to Old Denton Creek $ 9,400,000
- Dredging of Flood Control and Old Denton Creek Channels $ 37,400,000
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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Location of Proposed Alternatives
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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I. INTRODUCTION
A. PURPOSE
Based on historical observations such as recent studies and field observations of Denton Creek during the
past decade, segments throughout the creek have undergone significant erosion and sedimentation
raising issues for both citizens and governing bodies located near the creek. Sedimentation within the
flood control channel of the Denton County Levee Improvement District No. 1 (DCLID-1) has raised flood
risk concerns causing higher Base Flood Elevations (BFE) which result in reduced freeboard for the DCLID-
1 levees and other developed areas on fill. Downstream of the DCLID-1, in the City of Coppell, stream bank
erosion along the creek has impacted several residential homes which are at risk for additional loss of
property. The City has also raised concern about erosion along the creek between Denton Tap Road and
State Highway 121. The purpose of this study was to assess the existing conditions of Denton Creek and
to develop a channel improvement plan aimed at reducing sedimentation and flood risk within the DCLID-
1 portion of Denton Creek. Halff Associates, Inc. (Halff) was also separately contracted by the City of
Coppell to perform an assessment along Denton Creek within the city limits to address areas of significant
erosion. The approach and methodology used for the existing conditions evaluation was maintained
between these two studies. However, alternatives developed for the City of Coppell study were not
incorporated or evaluated in conjunction with any purposed alternatives for the DCLID-1 study. A copy of
this report can be provided to the DCLID-1 upon approval by the City of Coppell.
B. STUDY AREA
Denton Creek is a tributary to the Elm Fork Trinity River. The upper portion of Denton Creek, above the
Grapevine Lake Dam, originates near Bowie, Texas. The lower portion, downstream of the Grapevine Lake
dam to the confluence with the Elm Fork Trinity River is located in the cities of Grapevine, Carrollton and
Coppell. At the Grapevine Lake dam, the watersheds total drainage area is approximately 695 square
miles. Releases from Grapevine Lake into lower Denton Creek are controlled by the United States Army
Corps of Engineers (USACE) up to the emergency spillway elevation of 560 feet. Above this elevation,
releases from Grapevine Lake are uncontrolled. The total contributing area of the lower Denton Creek
watershed is 25.42 square miles. This study is focused on the lower portion of Denton Creek and all
references within the report to Denton Creek herein refer to Lower Denton Creek. A project location map
is shown in Appendix A, Exhibit 1 as well as below in Figure 1.
Denton Creek is approximately 11.25 miles in length and originates at the spillway of Grapevine Lake,
flowing generally east and south to its confluence with the Elm Fork Trinity River. The DCLID-1 segment
of Denton Creek extends from Denton Tap Road to approximately 4,700 feet downstream of MacArthur
Boulevard. The DCLID-1 levee begins approximately 3,200 feet downstream of Denton Tap Road and
extends to its termination near the IH-35E/SH 121 intersection. In 1986 the flood control channel and
levee was constructed within the DCLID-1 portion to provide additional flood conveyance and protection.
The existing Denton Creek (Old Denton Creek) within this section remains and intersects the flood control
channel at several locations between Denton Tap Road and the downstream limits of DCLID-1. The 1986
Gateway Reclamation project originally designed the flood control channel to convey the higher flows. As
part of the Plan of Reclamation for the project, inline weirs were constructed within the flood control
channel to convey low flows down the Old Denton Creek channel and not the flood control channel.
However, due to sedimentation within parts of the Old Denton Creek channel very little flow is conveyed
down those reaches. A majority of the low flow is conveyed down the flood control channel portion. As
a result concerns over BFE’s through the DCLID-1 portion have been raised due to reduced flood capacity.
The limits of this study extend from SH 121 to Denton Creek’s confluence with the Elm Fork Trinity River.
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Denton Creek’s watershed is considered to be almost fully-developed below Lake Grapevine, therefore,
fully developed discharges were used for this study.
This study is based on the most recent technical data available for Denton Creek. The study determined
updated fully developed conditions peak flood flows and water surface elevations. The current effective
flood mapping for Denton Creek is located on FEMA FIRM panels 48113C0135K and 48113C0155K for
Dallas County, Texas effective date July 4, 2014, and panel 48121C0705G for Denton County, Texas
effective date April 18, 2011. There are nine (9) structures crossing Denton Creek in the study area
including Grapevine Mills Parkway, Lakeside Parkway, State Highway 121, Denton Tap Road, MacArthur
Boulevard, two pedestrian bridges, and two sanitary sewer crossings. Figure 1 shows the project location
and limits.
Figure 1: Project Location
C. STUDY OBJECTIVES
Specific objectives of the Denton Creek Drainage Study for the DCLID-1 include:
• Perform a geomorphological evaluation along the creek to assess stream conditions
• Update existing hydrologic models to determine discharges for the 1-,2-,5-,10-,25-,50-,100-, and
500-year storm events based on current hydrologic data and future land use
• Develop detailed one-dimensional (1D) and two-dimensional (2D) hydraulic modeling for
existing and proposed conditions
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• Formulate alternatives and recommend a master plan of conceptual level improvements to
mitigate sedimentation within the flood control channel, provide reduced flood risks and meet
FEMA levee freeboard requirements for certification
The Alternative Analysis focused on improvements within public Right of Way (R.O.W.)/easements that
would result in stable channel conditions. Alternatives on or within private property were not considered.
Several options were evaluated to provide multiple benefits such as deposition reduction and reduced
flood risk to the surrounding areas while avoiding negative impacts downstream. The alternatives
considered include the construction of a sediment trap to contain the deposition within a specified area
for easier removal and the construction of six (6) berms located within the flood control channel to divert
low flows to the Old Denton Creek channel.
D. FLOODING HISTORY
The maximum known flood for lower Denton Creek occurred in May of 1908, according to local reports
from residents. No specific data for this event exists along Denton Creek, however an estimated discharge
of 145,000 cubic feet per second (cfs) was recorded for the Elm Fork Trinity River at Sandy Lake Road. In
April of 1942 extensive flooding was recorded throughout the upper Trinity watershed with a measured
discharged of 90,700 cfs for the Elm Fork Trinity River at Sandy Lake Road. Since that time, the
construction of three major flood control reservoirs have drastically reduced flood risk for Lower Denton
Creek and the Elm Fork Trinity River: Grapevine Lake was constructed in 1952. Lake Lewisville was
constructed in 1954 and Lake Ray Roberts was constructed in 1975. In September of 1964 a storm event
approaching the magnitude of the 100-year intensity at the time in the City of Coppell resulted in a
discharge of 33,000 cfs for the Elm Fork Trinity River at Sandy Lake Road. This flow was primarily from the
uncontrolled areas below Lewisville Lake and Grapevine Lake. Prolonged heavy rainfall in May of 1989
caused both Lake Lewisville and Lake Grapevine to record peak elevations above the crest of their
uncontrolled spillways. This caused an uncontrolled release over the Grapevine Lake spillway down
Denton Creek and resulted in flooding along Denton Creek, Cottonwood Branch, and the Elm Fork Trinity
River. This event, coupled with increased development within the City of Coppell, led to the commission
of the City-Wide Storm Water Management Study completed by Halff for Coppell in January 1991. In May
and June of 1990, record rainfall caused the closure of Sandy Lake Road and units in the Wellington Place
Apartment complex on MacArthur Boulevard to flood. This flood was estimated by the USACE to be in the
range of a 25 to 50-year frequency storm event. The most recent flooding occurred in May and June of
2015. On May 29th rain gages at Grapevine Lake and Lewisville Lake recorded 4.17 and 4.1 inches of rainfall
respectively. Rainfall for June 17th and 18th measured 1.27 and 1.51 inches at Grapevine Lake and 2.32
inches on June 18th at Lewisville Lake. The 2015 rainfall caused flooding in Andrew Brown Park and the
Wellington Place Apartments in the City of Coppell.
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Denton County Levee Improvement District No. 1
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II. WATERSHED DESCRIPTION
A. DATA SEARCH AND COLLECTION
Methods
Halff collected pertinent data for the Denton Creek study from a variety of sources, including visual
observations, all of which was necessary to conduct the study. The data collected included recorded flood
complaints, digital spatial data, effective, and best available hydrologic and hydraulic models.
Coordination with the United States Army Corps of Engineers (USACE) was necessary for documentation
of previous hydrologic and hydraulic studies conducted on Denton Creek. The information collected from
the City of Coppell was used to provide guidance during the model development process and alternatives
analysis.
Data Sources
Digital spatial data was collected from the City of Coppell and other entities and used in analyzing existing
conditions. The existing hydrologic and hydraulic models were obtained from the USACE. This data,
provided in ERSI ArcGIS format, included stream centerlines, street centerlines, storm drain layout, 2014
aerial imagery, 2009 terrain surface data, soils data, existing land use data, zoning maps, and parcel data.
Table 2.1 below provides a list of the spatial data collected, the provider, and the date received.
Table 2.1: Summary of ArcGIS Data
Data Description Received From Date Received
Storm Drains Storm Drain Lines City July 2015
Street Centerlines City Streets DFIRM N/A
2014 Aerials Aerial Photography City October 2016
Topography 2009 TNRIS LiDAR Topography TNRIS October 2016
Creeks Stream Centerlines City October 2016
Parcels County Parcels City October 2016
Stream Centerlines 2009 DFIRM data DFIRM N/A
Floodplains 2009 DFIRM data DFIRM N/A
Base Flood Elevations 2009 DFIRM data DFIRM N/A
Cross Sections 2009 DFIRM data DFIRM N/A
Soils SSURGO NRCS N/A
Zoning Current City Zoning City July 2015
B. FIELD RECONNAISSANCE
Field reconnaissance along Denton Creek was performed to become familiar with the channel, hydraulic
structures, land use, vegetative cover, conditions of the floodplain, and problem areas within the
watershed. These visits included general observation of hydraulic structures as well as the surrounding
areas. Photos collected during field reconnaissance can be found in the geomorphology assessment in
Appendix B.
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C. GEOMORPHOLGY EVALUATION
Methodology
A fluvial-geomorphic assessment of Denton Creek was completed by Dr. Peter Allen and Dr. John Dunbar
of Baylor University’s Department of Geosciences, along with Dr. Jeff Arnold of the United States
Department of Agriculture (USDA) – Agriculture Research Service. The full report is provided in Appendix
B – Fluvial-Geomorphic Assessment of the Denton County Levee (DCLID No. 1) Segment of Denton
Creek. A Summary of the report as well as pertinent data is provided in the following sections. The scope
of the geomorphic assessment included the following tasks:
• Analyze the current condition of the of the channel through visual survey
• Conduct a stability analysis using empirical and analytical methods including Capacity Supply
Analysis (CSA)
• Assess stable channel configurations
• Assess sediment contribution and source of sediment in supply reach.
• Physically measure erodibility of banks through submerged jet testing
• Measure the grain size in the supply reach upstream and assess incipient motion of bed material.
This assessment utilized multiple empirical methods to calculate sediment balance of the creek as well as
recommended stable channel design. Pertinent hydrologic and hydraulic data was provided by Halff for
use in this evaluation.
Stream Condition Assessment
A stream condition assessment was conducted from the Grapevine Lake Dam to the downstream limits
of the DCLID-1. This assessment included obtaining channel measurements and documenting locations of
erosion/scour. Soil samples were also obtained to determine grain size distribution and erodibility of the
bed material. The creek bed material is primarily fine sand which is characterized as highly mobile at low
flow depths. A majority of the transported sediment is suspended at a depth of less than six feet. Hydraulic
information such as flowrate, velocity, shear, water surface elevations (WSEL), depth and stream power
was provided by Halff to Dr. Allen and his Team for the determination of the bankfull discharge on Denton
Creek. Bankfull discharge is defined as the dominant channel forming flow for a stream or river. For
Denton Creek, the bankfull discharge was found to be less than the 1-year frequency storm discharge at
approximately 1,080 to 1,740 cfs within the study reaches. Other information provided by Halff included:
1-year and 100-year frequency storm flows to assist in the evaluation of stable channel design. The flood
control channel within DCLID-1 is expected to continue to meander to achieve more stable channel
conditions and sediment is deposited. This may result in areas where the channel undercuts the levee. It
can be anticipated that Denton Creek upstream of Denton Tap past SH 121 will continue to degrade over
many years transporting more sediment towards DLCID-1. Based on the findings from the geomorphology
evaluation, the releases form Grapevine Lake are the dominant control on downstream channel
morphology and ultimate control in the downstream channel stability calculations.
Identified Areas of Concern
Based on the results of the stream condition assessment, the sediment supply reach for Denton Creek is
located approximately 5,500 feet upstream of State Highway 121 to Denton Tap Road, which consists
mostly of fine grained sands. Due to the downcutting and widening of the channel, sediment is being
transported and deposited within the DCLID-1. Current degradation patterns are attributed to the past
excavation, shortening of channel length, and flattening of channel slope near the upper portion of the
DCLID-1 during the construction of the levee from 1986-1987. This caused an imbalance in overall stream
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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equilibrium resulting in the degradation of Denton Creek upstream of Denton Tap Road fand the
deposition of eroded material within DCLID-1 in order to regain that equilibrium. Jet testing reveals that
the fine sand is highly erodible and travels with high occurrence flow events that are three feet or less in
depth. Due to the frequency of these high occurrence flow events, the sand fills the DCLID-1 flood control
channel at an approximate rate of 1.6 feet per year. Field observations revealed that the Old Denton Creek
channel at the downstream limit of the DCLID-1 currently contains two to six feet of sediment deposition.
Figure 2.1 below shows the surveyed flowlines of the flood control channel and Old Denton Creek
compared to the original 1986 Gateway Reclamation flood control channel.
Figure 2.1: Channel Profile Comparison
It was also observed at this location that Denton Creek is attempting to breach its right overbank in order
to cut a new path towards Cottonwood Branch. The Old Denton Creek channel meander adjacent to
MacArthur Boulevard does not contain much deposition as approximately 135,000 cubic yards of
sediment was removed in 2002. Results of the Capacity Supply Analysis (CSA), which assumes an infinite
supply of sediment, indicate that it is possible for 174,104 tons per year of bed material to be transported
to the DCLID-1. If degradation and widening continue it is possible for the supply to continue for a
minimum of 35 years. In 2002 approximately 135,000 cubic yards or 182,000 tons of sediment was
removed from 14 years of accumulation. This is approximately 13,000 tons per year settling within the
DCLID-1. Therefore approximately 161,104 tons is transported downstream to the Elm Fork of the Trinity
River. Figure 2.1 shows the sediment budget for DCLID-1 based on the results from the CSA.
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Denton County Levee Improvement District No. 1
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Figure 2.2: Annual Sediment Budget for DCLID-1
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Recommendations
To determine stable channel design parameters the Capacity/Supply Ratio Method (CSR) was utilized. This
method balances the sediment transport capacity of a design reach with the sediment supply of an
upstream reach over the entire flow duration curve rather than for a single discharge. This method has
been used to determine channel modifications that promote sediment balance within the creek to achieve
long-term channel stability. The governing equation used for this method is provided below:
/
A CSR of one (1) denotes an equilibrium for the channel while less than one (1) indicates degradation and
more than one means aggradation of sediments is likely. Using this approach for the Denton Creek study
reach indicates a stable channel geometry design for Denton Creek would require a top width of
approximately 69 feet and a channel slope of 0.00045 ft/ft. Exact dimensions for channel geometry used
for design may vary based on topography, horizontal/vertical limitations, and the need to maintain
positive drainage. The recommendations provided in the geomorphology evaluation are primarily focused
on providing a stable channel condition to help mitigate the adverse effects of erosion and sedimentation
along Denton Creek. Its purpose is to not address specific erosion concerns along the creek, but rather
provide recommended channel geometry for global stability.
D. SURVEY
Detailed channel surveys were completed by Halff Associates, Inc. in October 2016. Field survey cross
sections were measured every 300 feet along the main reach of Denton Creek from State Highway 121 to
Denton Tap Road and from the end of DCLID-1 to the confluence with the Elm Fork Trinity River. The old
Denton Creek channel that meanders through DCLID-1 was surveyed every 100 feet. The DCLID-1 flood
control channel was surveyed every 200 feet. Sonar technology was used within DCLID-1 to complete
surveying the flood control channel due to extended discharge releases from Grapevine Lake resulting in
flows too high for conventional survey methods. All of the survey was necessary to provide detailed data
for the channel and locate areas of deposition along the flood control channel. The datum used was North
American Datum 1983 (NAD 83), and the projected coordinate system used was State Plane Texas North
Central FIPS (4202). The North American Vertical Datum 1988 (NAVD 88) was used.
The topographic survey information for the cross sections included information about the channel bank
locations, toe and top of slope, and channel flow line information. This channel survey was spliced into
the existing hydraulic model cross section data in order to update the existing geometry. Using ArcGIS
version 10.2.2, two separate terrain models were created based upon the survey data and sonar data.
These terrain models were then merged together with 2009 Texas Natural Resources Information System
(TNRIS) Light Detection and Ranging (LiDAR) to create the overall terrain used for modeling purposes. Two
structures were surveyed; the weir locations in the flood control channel of the DCLID-1 segment of
Denton Creek and a sanitary sewer crossing in the lower reach at cross section 4378.
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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III. HYDROLOGY
The purpose of the hydrologic study is to estimate peak flood discharge rates and hydrographs for a range
of frequencies at defined points along Denton Creek for use in the hydraulic study. Detailed hydrologic
models were created utilizing the existing land use conditions. For existing conditions, the 1-, 2-, 5-, 10-,
25-, 50-, 100-, and 500-year events were analyzed. Halff utilized the hydrologic models from the USACE
Corridor Development Certificate (CDC) Denton Creek Hydrologic and Hydraulic Model Update dated May
2013. Halff revised these models to reflect current terrain and storm sewer data obtained from the cities
of Coppell and Lewisville. The revised hydrologic data included updates to drainage areas, lag times, and
percent impervious. The watershed is considered to be fully-developed.
A. METHODOLOGY
A hydrologic model was created for the approximately 25.42 sq. mile watershed using HEC-HMS version
3.5. For rainfall loss estimation, the model uses the Initial Constant Loss method. The Modified-Puls
routing method was used where the necessary hydraulic model was available and lag methods were used
where appropriate throughout the rest of the model. The methodology and approach used in the CDC
study was generally keep consistent and utilized for this study. Where methodology differs when
applicable, is in the subsequent sections of this report.
Modeling parameters were developed using updated topographic data 2009 LiDAR, Natural Resources
Conservation Service (NRCS) Soil Survey Geographic database, City of Coppell and Lewisville storm sewer
data and fully developed land-use conditions. As part of the modeling process, basin delineation and
percent impervious information, lag times, and routing reach information were all included based on
standard engineering practices. Drainage areas provided by USACE were further revised to reflect current
conditions within the watershed including storm sewer and updated topography. This information was
geo-referenced and imported into the HMS model.
Rainfall Data
The National Weather Service (NWS) “Technical Paper 40 (TP40)” manual was used to determine rainfall
depth-duration data for the 1-, 2-, 5-, 10-, 25-, 50-, 100- and 500-year events. This is kept consistent with
2013 USACE CDC study for Denton Creek as well as the Elm Fork Trinity River. The data was used to
develop a series of 24-hour rainfall hyetographs with 1-minute intensity duration. Rainfall precipitation
data is provided below in Table 3.1.
Table 3.1: Precipitation for 1- to 500-year Rainfall Events
Time
Precipitation (IN)
1-YR 2-YR 5-YR 10-YR 25-YR 50-YR 100-YR 500-YR
5 Min 0.42 0.46 0.53 0.58 0.65 0.71 0.77 1.13
15 Min 0.88 1.04 1.22 1.36 1.56 1.71 1.87 2.49
1 Hour 1.51 1.87 2.34 2.67 3.15 3.52 3.89 4.75
2 Hours 1.83 2.25 2.93 3.43 4.03 4.54 5.03 6.17
3 Hours 2.00 2.48 3.27 3.88 4.55 5.13 5.70 7.01
6 Hours 2.32 2.97 3.92 4.66 5.48 6.19 6.91 8.57
12 Hours 2.67 3.44 4.66 5.53 6.47 7.33 8.24 10.36
1 Day 3.09 3.99 5.38 6.41 7.53 8.54 9.54 11.86
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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Drainage Basin Delineation
The watershed area for Denton Creek was determined to be approximately 25.42 square miles (sq. mi).
The original drainage area delineation was completed in August 2006 as part of the USACE’s update of the
CDC model for Denton Creek. The CDC model delineation was based on topographic data, where available,
and USGS quad maps. Drainage area divides were located at hydraulic structures and at any point where
a substantial change in flow occurs along the reach. For this study, the drainage area delineation
developed by the USACE were revised by Halff using 2009 TNRIS LiDAR information and taking into
account streets, storm sewer and observed drainage patterns. HEC-HMS model junctions were placed at
any point where there is a substantial change in flow to define flow breaks along the reach. There are 30
total drainage sub-areas which contribute to Denton Creek ranging from 0.01 to 6.11 sq. mi. with an
average of 0.88 sq. mi. Table 3.2 shows the USACE and Halff revised drainage area comparison. A map
of the drainage basins is located in Appendix A, Exhibit 2 and flow change locations are provided in Exhibit
3.
Table 3.2: Drainage Area Comparison
USACE
Drainage Area
Halff
Drainage Area
Drainage Area
USACE
(sq. mi.)
Halff
(sq. mi.)
Difference
(sq mi)
Difference
(%)
SUB 1 DCLID_0010 0.2 0.28 0.08 41%
SUB 2 DCLID_0020 1.15 1.29 0.14 12%
SUB 3 DCLID_0030 0.16 0.08 -0.08 -50%
SUB 4 DCLID_0040 0.81 0.81 0.00 0%
SUB 5 DCLID_0050 0.02 0.02 0.00 16%
SUB 6 DCLID_0060 1.31 1.22 -0.09 -7%
- DCLID_0070* - 1.02 - -
SUB 8 DCLID_0080 0.77 0.50 -0.27 -35%
- DCLID_0090* - 0.08 - -
SUB 9 DCLID_0100 0.1 0.16 0.06 57%
SUB 11 DCLID_0110 0.02 0.01 -0.01 -41%
SUB 12 DCLID_0120 2.98 3.02 0.04 1%
SUB 13 DCLID_0130 0.12 0.13 0.01 7%
SUB 14 DCLID_0140 0.05 0.05 0.00 -9%
SUB 15 DCLID_0150 0.6 0.93 0.33 55%
SUB 16 DCLID_0160 0.25 0.25 0.00 0%
SUB 17 DCLID_0170 0.6 0.34 -0.26 -44%
SUB 18 DCLID_0180 0.09 0.10 0.01 11%
SUB 19 DCLID_0190 0.32 0.22 -0.10 -30%
SUB 20 DCLID_0200 0.56 0.62 0.06 12%
SUB 21 DCLID_0210 0.03 0.04 0.01 41%
SUB 23 DCLID_0230 0.72 0.76 0.04 6%
SUB 24 DCLID_0240 0.69 0.40 -0.29 -42%
SUB 25 DCLID_0250 0.14 0.42 0.28 200%
SUB 26 DCLID_0260 6.33 6.11 -0.22 -3%
SUB 28 DCLID_0270 0.51 0.42 -0.09 -17%
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Denton County Levee Improvement District No. 1
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USACE
Drainage Area
Halff
Drainage Area
Drainage Area
USACE
(sq. mi.)
Halff
(sq. mi.)
Difference
(sq mi)
Difference
(%)
SUB 27 DCLID_0280 1.29 1.34 0.05 4%
SUB 29 DCLID_0290 1.76 1.68 -0.08 -5%
SUB 30 DCLID_0300 3.19 3.12 -0.07 -2%
Cumulative 24.77 25.42 0.65 3%
*New drainage area as a result of further delineation of USACE drainage areas
Drainage Area Parameters
Hydrologic parameters such as drainage area, time of concentration, percent urbanization, and percent
impervious were computed for this study. Parameter calculations for revised existing conditions were
computed for drainage areas in the Denton Creek watershed, and are shown in Appendix F. Soils and fully
developed land use exhibits can be found in Appendix A, Figures 4 and 5, respectively.
In order to determine a percent impervious value for each drainage area, the revised existing conditions
hydrologic models used the zoning districts provided by the municipalities. City zoning and aerials were
used to determine a percent impervious and percent urban for each drainage area. The methodology to
use percent impervious and urbanization for each landuse and were kept consistent with the CDC model,
which was based on the year 2055. This data was obtained from the North Central Texas Council of
Governments (NCTCOG) ultimate land use conditions (fully developed) for the purposes of the CDC study.
Based upon drainage area redelineation, the total percent impervious was re-calculated for each drainage
area using ArcGIS to develop a composite impervious value for use in HMS. Table 3.3 provided below
shows the percent impervious and percent urbanization values used for this study.
Table 3.3: Land Use
Description
Percent
Impervious
(%)
Percent
Urbanization
(%)
Single Family 41 80
Multi-family 70 95
Mobile Homes 20 40
Group quarters 60 70
Commercial 95 95
Office 90 90
Retail 95 95
Institution 40 50
Hotel/motel 95 95
Institutional/semi-public 40 50
Education 40 50
Industrial 90 95
Transport 15 30
Roadway 35 80
Utilities 60 70
Airports 20 40
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Denton County Levee Improvement District No. 1
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Description
Percent
Impervious
(%)
Percent
Urbanization
(%)
Runway 100 100
Railroad 15 30
Communication 75 95
Parks/recreation 6 10
Parks 6 10
Under construction 15 20
Cemeteries 6 10
Flood Control 0 0
Vacant 0 0
Vacant 0 0
Residential acreage 25 30
Ranch land 0 0
Timberland 0 0
Farmland 3 5
Parking 95 95
Water 100 100
Water 100 100
Small water bodies 100 100
Transportation 35 80
The initial and constant loss method was used for loss rate estimation in this study. This method was used
for to remain consistent with the USACE 2013 CDC report. The values used are shown in Table 3.4. A
percent impervious and urbanization value was determined using ArcGIS based on the zoning for each
area. The percent impervious represents the percentage of the drainage area that is covered by
impervious material and is hydraulically connected to the basins network. The percent urbanization is the
percentage of the local area that has been developed and/or improved with channelization and/or a storm
collection network. A composite percent impervious and urbanization was then calculated for each
drainage area.
Table 3.4: Initial and Constant Loss Parameters
Storm
Frequency
(yr)
Initial Loss
(in)
Constant
Loss
(in/hr)
1 1.5 0.2
2 1.5 0.2
5 1.3 0.16
10 1.12 0.14
25 0.95 0.12
50 0.84 0.1
100 0.75 0.07
500 0.5 0.05
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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Lag times and peaking coefficients are input parameters for the Snyder Unit Hydrograph method in HEC-
HMS and were calculated using the standard methodology. Snyder’s method was selected for consistency
with the USACE 2013 CDC report. Snyder Unit Hydrograph takes into consideration the length, length from
basin centroid, and slope. The flow path from the most hydrologic point of the basin to the outlet is the
length. Using the basin centroid location, the flow path from this point perpendicular to the original length
to the outlet is calculated. The slope is based upon the elevations at 85% and 10% on the total length from
the outlet. These parameters were calculated using ArcGIS. Percent clay and sand were calculated using
soils data from the National Resource Conservation Service (NRCS) Soil Survey Geographic (SSURGO)
database. Table 3.5 shows the Halff revised and USACE drainage area parameters comparison. The
differences reflect the revision based on updated topography and storm sewer.
Table 3.5: Drainage Area Parameter Comparison
USACE
Drainage Area
Halff
Drainage Area
Percent Impervious (%) Lag Time (hr)
USACE Halff Difference USACE Halff Difference
SUB 1 DCLID_0010 40 6.7 -33.3 0.24 0.39 0.15
SUB 2 DCLID_0020 23.5 60.3 36.8 0.53 0.57 0.04
SUB 3 DCLID_0030 41.88 39.9 -1.98 0.26 0.12 -0.14
SUB 4 DCLID_0040 66.66 38.7 -27.96 0.42 0.79 0.37
SUB 5 DCLID_0050 67.03 67.3 0.27 0.1 0.1 0
SUB 6 DCLID_0060 70.41 70.1 -0.31 0.48 0.78 0.3
- DCLID_0070 - 71.6 - - 0.58 -
SUB 8 DCLID_0080 86.91 81.2 -5.71 0.33 0.4 0.07
- DCLID_0090 - 87.6 - - 0.17 -
SUB 9 DCLID_0100 79.94 75.2 -4.74 0.16 0.13 -0.03
SUB 11 DCLID_0110 19.37 7.9 -11.47 0.19 0.36 0.17
SUB 12 DCLID_0120 40.73 43 2.27 0.88 1.2 0.32
SUB 13 DCLID_0130 20.05 80.9 60.85 0.2 0.2 0
SUB 14 DCLID_0140 15.61 26.2 10.59 0.14 0.15 0.01
SUB 15 DCLID_0150 19.41 68.5 49.09 0.38 0.45 0.07
SUB 16 DCLID_0160 73.08 55.3 -17.78 0.2 0.31 0.11
SUB 17 DCLID_0170 9.97 85 75.03 0.47 0.4 -0.07
SUB 18 DCLID_0180 86.21 45.5 -40.71 0.18 0.1 -0.08
SUB 19 DCLID_0190 48.15 60.2 12.05 0.22 0.34 0.12
SUB 20 DCLID_0200 59.96 77.5 17.54 0.36 0.44 0.08
SUB 21 DCLID_0210 26.06 23 -3.06 0.1 0.1 0
SUB 23 DCLID_0230 71.93 68.5 -3.43 0.44 0.71 0.27
SUB 24 DCLID_0240 36.88 37.2 0.32 0.28 0.33 0.05
SUB 25 DCLID_0250 39.95 59.5 19.55 0.26 0.36 0.1
SUB 26 DCLID_0260 50.82 67.9 17.08 1.75 2.05 0.3
SUB 28 DCLID_0270 23.67 47.4 23.73 0.38 0.37 -0.01
SUB 27 DCLID_0280 39.68 45.3 5.62 0.55 0.35 -0.2
SUB 29 DCLID_0290 46.38 64.8 18.42 0.24 0.59 0.35
SUB 30 DCLID_0300 33.59 31 -2.59 1.55 2.48 0.93
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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Channel Routing
Two channel routing methodologies were used in this study: Modified-Puls and Lag Time. Lag Times were
used in the most downstream reach where the DCLID-1 sump outfall discharges into Denton Creek until
the confluence with the Elm Fork Trinity River. The lag time routing method was chosen due to
complexities at the Elm Fork confluence. Modified-Puls was used as the routing method for all other
reaches within the watershed.
Those reaches that were routed using Modified-Puls used the hydraulic model (HEC-RAS) to develop
storage discharge relationships for each reach. The development of the hydraulic model will be discussed
in detail in Section IV of this report. A range of discharge values were used in the steady state hydraulic
model to develop storage-discharge curves for each routing reach. The resulting storage-discharge curves
were input back into the HMS model for use in the Modified-Puls routing. The lateral weirs in the HEC-
RAS model, which will be discussed in Section IV of the report, were not optimized for the routing runs.
This process was iterated until discharge values converged; these storage-discharge curves were used in
the final routing. Lag routing was used in the downstream reaches of the watershed and set to 60 minutes
based on the existing CDC report.
Modified-Puls routing also requires a determination of the number of steps, or subreaches. The intent is
to set the number of steps such that the travel time through each subreach is equal to the timestep, in
this case 1-minute. The step calculation was accomplished using the equation shown below, where ! is
the total routing reach length and " is the average wave speed.
#
∆
The number of sub-reaches was calculated based on the 1-minute time step and average wave speed, in
this case the average channel velocity, was taken from the RAS model for each range of sections in the
routing reach. The average velocity was recalculated at each iteration to ensure consistency between the
storage-discharge relationships and the subreaches.
Reservoir Routing
There is one reservoir modeled in the Denton Creek HMS model. The DCLID-1 sump is located near the
downstream limits of the DCLID-1 to the north of the levee and outfalls into the flood control channel.
Due to the pumping operations of the pond a rating curve was used based on the CDC model. The initial
elevation was set at 436.0 ft. The Elevation-Discharge curve was the same as used in of the CDC model.
B. RESULTS AND CONCUSIONS
Summary of Results
The hydrologic analysis for Denton Creek was modeled using HEC-HMS version 3.5. Table 3.6 displays the
peak discharges for the existing 1-, 2-, 5-, 10-, 25-, 50-, 100- and 500-year events at several key locations
throughout the watershed. Detailed tables with peak discharges for each of the drainage areas, junctions,
routing reaches, etc. are provided in Appendix D of this report. The hydrologic modeling is based on fully
developed land use conditions. The 100- and both 500-year USACE discharge of 13,000, 36,200 and 55,500
cfs, respectively, are the calculated discharges that would be flowing over the emergency spillway plus
releases out of Grapevine Lake during these events. These discharges were calculated by the USACE as
part of the original CDC model for Denton Creek. The 13,000 and 36,200 cfs are effective FEMA discharges
for these events and were adopted by FEMA since the completion of Grapevine Lake in 1952. However
the 55,500 cfs is the new 500-year discharge developed by the USACE for the 2013 Denton Creek CDC
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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which has not been adopted by FEMA. These discharge were used until the HMS discharges became
greater than these USACE discharges. Thus, these 100- and 500-year USACE discharges were modeled.
Table 3.6: HEC-HMS Discharge Summary
HEC-HMS
Element
Drainage
Area
(sq.
mile)
1-Year
Storm
Event
2-Year
Storm
Event
5-Year
Storm
Event
10-Year
Storm
Event
25-Year
Storm
Event
50-Year
Storm
Event
100-Year
Storm
Event
Old 500-
Year
Storm
Event
New 500-
Year
Storm
Event
DCLID_J0020 1.57 2,200 3,200 4,300 4,900 5,800 6,500 13,000* 36,200* 55,500*
DCLID_J0030 1.64 2,200 3,200 4,300 4,900 5,800 6,500 13,000* 36,200* 55,500*
DCLID_J0040 2.45 2,200 3,200 4,300 4,900 5,800 6,500 13,000* 36,200* 55,500*
DCLID_J0050 2.48 2,200 3,200 4,300 4,900 5,600 6,300 13,000* 36,200* 55,500*
DCLID_J0060 3.70 3,200 4,600 6,200 7,100 8,100 9,100 13,000* 36,200* 55,500*
DCLID_J0070 4.72 3,500 5,000 6,000 6,800 7,900 8,300 13,000* 36,200* 55,500*
DCLID_J0080 5.22 3,600 5,200 6,300 7,000 8,100 8,500 13,000* 36,200* 55,500*
DCLID_J0090 5.30 3,600 5,100 6,200 7,000 8,000 8,500 13,000* 36,200* 55,500*
DCLID_J0100 5.46 3,600 5,000 6,200 6,800 7,900 8,400 13,000* 36,200* 55,500*
DCLID_J0110 5.47 3,500 5,000 6,000 6,600 7,600 8,200 13,000* 36,200* 55,500*
DCLID_J0120 8.49 4,400 6,400 8,200 9,200 10,000 10,800 13,000* 36,200* 55,500*
DCLID_J0130 8.62 4,400 6,400 8,200 9,200 10,000 10,800 13,000* 36,200* 55,500*
DCLID_J0140 8.67 4,400 6,300 8,200 9,200 10,000 10,800 13,000* 36,200* 55,500*
DCLID_J0150 9.59 4,500 6,400 8,500 9,700 10,700 11,400 13,000* 36,200* 55,500*
DCLID_J0160 9.84 4,400 6,300 8,400 9,600 10,600 11,400 13,000* 36,200* 55,500*
DCLID_J0170 10.18 4,400 6,300 8,500 9,700 10,800 11,500 13,000* 36,200* 55,500*
DCLID_J0180 10.28 4,400 6,300 8,500 9,800 10,800 11,600 13,000* 36,200* 55,500*
DCLID_J0190 10.50 4,400 6,300 8,500 9,700 10,800 11,600 13,000* 36,200* 55,500*
DCLID_J0200 11.13 4,400 6,300 8,600 9,900 11,000 11,800 13,000* 36,200* 55,500*
DCLID_J0210 11.17 4,400 6,300 8,600 9,900 10,900 11,800 13,000* 36,200* 55,500*
DCLID_J0230 11.93 4,500 6,300 8,700 10,100 11,200 12,100 13,000* 36,200* 55,500*
DCLID_J0240 12.33 4,400 6,300 8,700 10,100 11,200 12,100 13,100 36,200* 55,500*
DCLID_J0250 12.75 4,400 6,300 8,700 10,100 11,200 12,200 13,200 36,200* 55,500*
DCLID_J0260 18.86 5,800 8,100 11,900 14,400 16,500 18,100 20,200 36,200* 55,500*
DCLID_J0270 19.28 5,800 8,100 11,900 14,400 16,600 18,200 20,300 36,200* 55,500*
DCLID_J0280 20.62 5,800 8,100 11,900 14,500 16,800 18,500 20,600 36,200* 55,500*
DCLID_J0290 22.30 5,700 8,400 12,500 15,300 17,500 19,400 21,400 36,200* 55,500*
DCLID_JOutlet 25.42 5,800 8,700 12,900 16,100 18,500 20,600 22,700 36,200* 55,500*
* The 100-, old 500-, and new 500-Year discharges are the calculated discharges by the USACE for releases out of
Grapevine Lake combined with flow over the emergency spillway during these storm events
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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Comparison with Effective Discharges
The 100-year discharge developed as part of this study was compared to FEMA and USACE effective 100-
year discharge along Denton Creek. The FEMA discharges are from the 2014 effective FIS discharges for
Dallas County. The USACE discharges are from the 2013 CDC model. Table 3.7 compares the Halff revised
existing, USACE, and FEMA FIS 100-year discharge, where FIS discharges could be compared.
Table 3.7: 100-Year Discharge Summary
Location Description River
Station
100-Year Discharges
FEMA USACE Halff
(cfs) (cfs) (cfs)
17892 Approximate Beginning of Levee
Approximately 3,300 feet
downstream of MacArthur Boulevard 18826 20,600 22,000 20,300
MacArthur Boulevard
24519 Approximate End of Levee
Approximately 3,769 feet
downstream of Denton Tap Road 25499 21,300 21,000 20,200
Approximately 2,500 feet
downstream of Denton Tap Road 26688 21,300 21,000 13,100
Approximately 1,000 feet
downstream of Denton Tap Road 28217 21,300 13,500 13,000
Denton Tap Road
Halff revised existing discharges were slightly different than FEMA FIS effective discharges for Dallas
County. When compared with USACE discharges, Halff revised existing discharges are lower than the CDC
model. This is due to updated terrain and storm sewer configuration which were taken into consideration.
These differences reflect revisions to existing drainage areas and the resulting changes to the other
hydrologic parameters.
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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IV. HYDRAULICS
The hydraulic analysis included the development of a detailed 1D steady, 1D/2D unsteady, and 2D
unsteady state hydraulic models for approximately 11.25 miles of Denton Creek. The 1D steady state
model was developed to better compare hydraulic results with the effective FEMA and CDC hydraulic
models which were both computing using steady state flows. It was utilized to account for releases from
Grapevine Lake. The 1D/2D unsteady model was developed to evaluate the effects of the time of inflow
hydrographs and attenuation of the flood wave. This model also includes a portion of the Elm Fork Trinity
River as a 2D storage area to accurately model flow interaction between Denton Creek and the Elm Fork
Trinity. The 2D unsteady model was developed to better evaluate velocity distribution through the creek
as well flow interaction between the DCLID-1 flood control channel and Old Denton Creek. Peak flows
computed from the detailed hydrologic model were input into the hydraulic model and water surface
elevations were computed for the 1-, 2-, 5-, 10-, 25-, 50-, 100-, and 500- year flood frequencies within the
1D steady and unsteady model only. The 2D model only uses frequencies up to the 10-year event. The 1D
steady state model revised existing (fully developed land use) floodplain can be seen in Appendix A, Figure
6.
A. 1D STEADY STATE MODEL DEVELOPMENT
The 1D steady-state hydraulic model was developed using HEC-RAS (Version 5.0.3). Cross section
geometry was determined using a combination of 2009 TNRIS LiDAR and survey data. The criteria used in
the Denton Creek hydraulic analysis is in accordance with the general FEMA, USACE modeling criteria,
and standard engineering practices. The 1D steady model was also used to model the USACE 100- and
500-year discharges, which included releases out of Grapevine Lake. After the steady state model was
developed, the model was converted to a 1D/2D unsteady state hydraulic model in order to better model
the backwater effects from the Elm Fork Trinity River and the effects of flow interaction between the old
channel and flood control within DCLID-1. The 1D/2D unsteady flow model was also used for a more
accurate comparison to the 2D unsteady model discussed in later sections of this report.
Cross Sections
Stream cross sections were positioned along Denton Creek to define the geometry of the hydraulic model.
They were laid out generally perpendicular to the direction of flow and spaced generally in the same
locations as survey data and USACE cross section locations.
A Triangulated Irregular Network (TIN) was created utilizing mass points and break lines from 2010 LiDAR
data. Using HEC-GeoRAS, cross section data was extracted from the TIN and imported into HEC-RAS for
evaluation and filtering. Survey data was added into the HEC-RAS model where available. Cross sections
32331 through 36181 include the Westhaven Residential development geometry in the left overbank. The
current construction in Andrew Brown Park are not reflected in the geometry. The locations of the
hydraulic cross-sections are displayed on the floodplain work maps presented in Appendix A, Exhibit 6.
Stream Reach Layout
The HEC-RAS model includes a total of four (4) distinct reaches. The reaches include the following:
• Denton Creek Below DCLID-1 – Extends approximately 18,000 feet from the DCLID No. 1 sump
outfall to the confluence at Elm Fork Trinity River
• DCLID-1 Denton Creek Flood Control Channel – Extends approximately 11,100 feet from Denton
Tap Road to the DCLID-1 sump outfall
• Denton Creek above DCLID-1 – Extends approximately 7,200 feet from State Highway 121 to
Denton Tap Road
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Denton County Levee Improvement District No. 1
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• Denton Creek below Grapevine Lake – Extends approximately 21,200 feet from State Highway
121 to the emergency spillway of Grapevine Lake
Manning’s Roughness Coefficients
Channel roughness coefficients (Manning’s “n”) were assigned to channels and overbank cross sections
based on actual physical condition using information from field inspections of floodplain areas. A
horizontal variation in n-values was used across the channel instead of composite n-values. Manning’s
roughness coefficients for the channels ranged from 0.045 through 0.055 and overbank roughness
coefficients ranged from 0.025 through 0.12 for Denton Creek. Manning’s n-value breaks were placed at
the bank locations, places where the overbank n-value changed, and also at locations where there was a
noticeable shift in the grades. In general, all n-values were kept consistent with the USACE model unless
engineering judgment from field visits warranted changing them.
Ineffective Areas
Ineffective flow areas were set on some of the culvert cross-sections to transition flow in the area of the
bridge crossings. This approach followed the standard practice as outlined in the HEC-RAS Hydraulic
Reference Manual. Most structures are configured such that the approach channels are roughly the same
width as the culvert or bridge opening. Ineffective flow areas were placed on cross sections throughout
the model to represent areas of the cross-section that do not convey flood flows, or where water could
possibly be stored. Ineffective areas were used mainly at ponds and parks in development areas.
Levees
Levees were used throughout the model to represent the high ground downstream of Denton Tap Road
and DCLID-1 levee which runs along the left overbank of the Denton Creek flood control channel. The
DCLID-1 Levee begins approximately 3,200 feet downstream of Denton Tap Road and terminates near the
intersection of IH-35E and SH 121.
Lateral Structures
A lateral structure was used to model the high ground along Gun Club Road. This allows flow to leave the
Denton Creek System into the Elm Fork Trinity River floodplain. The lateral structure was maintained
consistent with the CDC hydraulics model.
Bridges and Culverts
As previously mentioned, there are a total of nine hydraulic structures along the stream reaches. No
bridges, except for the sanitary sewer crossing at river station 4282, were surveyed. The bridge data from
the USACE CDC model was used in the 1D models. Contraction and expansion coefficients were set at a
value of 0.3 for contraction and 0.5 for expansion for the cross sections upstream and downstream of the
structures. Table 4.1 provides a summary of the various hydraulic structures.
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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Table 4.1: Hydraulic Structures
River Station Description Structure Type
4282 Sanitary Sewer Crossing Bridge
22146 MacArthur Boulevard Bridge
23825 Pedestrian Bridge Bridge
29267 Denton Tap Road Bridge
33100 Sanitary Sewer Crossing Bridge
34593 Pedestrian Bridge Bridge
36570 State Highway 121 Bridge
46076 Lakeside Parkway Bridge
50441 Grapevine Mills Parkway Bridge
B. 1D/2D UNSTEADY STATE MODEL DEVELOPMENT
Model Development
The 1D steady state model was converted to a 1D/2D unsteady state model in order to better model
backwater effects from the Elm Fork Trinity River and comparison to the 2D unsteady model results for
verification. This model was used to analyze potential impacts of the alternatives for the 100-year
frequency event. All hydraulic data and parameters in the 1D/2D unsteady state model was maintained
with 1D steady state model with some exceptions:
• The most upstream reach of Denton Creek that flows from the emergency spillway through
Grapevine Recreational Area Golf Course was removed from the geometry data. This was because
this portion of Denton Creek was well beyond the study area and scope of this project and did not
add any benefit to the purpose of this model.
• Ineffective areas representing ponds were changed to permanent. This is standard practice within
HEC-RAS unsteady models to improve model stability.
• A 2D mesh area was created to represent the Elm Fork Trinity River floodplain and connected to
the 1D river reach by two lateral weir connections. This allows flow to spill out of Denton Creek
into the Elm Fork floodplain, model backwater effects within the Elm Fork floodplain, and
accounts for storage ponds located near the Elm Fork.
Unsteady Flow Data
For the 1D reach within the unsteady model, inflow hydrographs were used from the Denton Creek HMS
model. Only basin runoff hydrographs were input to allow the unsteady model to route the inflow
hydrographs during simulation runs. Uniform lateral inflow hydrographs were selected as the inflow
boundary conditions for the model based on storm sewer outfall locations along the stream. The
exceptions were for Cottonwood Creek tributary and DCLID-1 sump outfall which were modeled as lateral
inflow hydrographs. Normal depth was used for the downstream boundary condition. The initial flow
condition for the model was set at 70 cfs due to normal low flow in Denton Creek ranges from 60-80 cfs
and to provide greater model stability. The boundary conditions for the 2D flow area connection for the
Elm Fork were modeled as normal depth values based on the slope within that reach.
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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Results
The 1D/2D unsteady existing conditions model was compared with both FEMA and USACE water surface
elevations. FEMA water surface elevations are obtained from the FEMA effective model, DFRIM BFEs, and
the Letter of Map Revision (LOMR) for the Westhaven Residential Development – Denton Creek prepared
by Kimley-Horn and Associates, Inc. in 2013 between cross section 32479 and 35888, which used FIS
discharges. Table 4.2 shows this study’s existing conditions and FEMA water surface elevations
comparison. Existing conditions were also compared with USACE water surface at the major road crossing
along Denton Creek shown in Table 4.3. Study water surface elevations are from the 1D/2D unsteady state
model, which does not take into consideration releases out of Grapevine Lake. Differences between
USACE and FEMA can be attributed to updated discharges, terrain, and survey. Revised existing conditions
water surface elevations were higher than BFEs along Denton Creek. These results also showed that levee
certification could be an issue with the current FEMA effective 500-year discharge of 36,200 cfs. Based off
the results from dredging of the flood control channel and the old channel in the alternative analysis,
which is discussed in detail in the following section of this report, the sedimentation within the flood
control channel has a major impact in these higher water surface elevations. Also, if the new CDC 500-
year discharge of 55,500 cfs becomes adopted by FEMA the DCLID-1 would no longer comply with the
level of protection outlined in the Plan of Reclamation. Table 4.4 shows the comparison for 100-year
water surface elevations between the 1-D steady and unsteady state models. Differences in study water
surface elevation results are because the 1D steady state model simulates water surface profiles using
peak flows only and the 1D/2D unsteady state model generates water surface elevations based upon time
varying flows. Due to this, typically unsteady flow water surface results are generally higher than steady
state results as is seen in the comparison. Adding the inflow hydrograph from the Elm Fork Trinity River
CDC model for the river also attributed to higher water surface elevations.
Table 4.2: FEMA Water Surface Elevation Comparison
Cross Section 100-Year WSEL (ft)
FEMA Halff Difference
17892 451.00 453.52 2.52
18335 452.00 453.53 1.53
18646 453.00 453.58 0.58
20397 453.30 454.27 0.97
21059 453.00 454.45 1.45
MacArthur Boulevard
22211 454.00 455.32 1.32
23506 454.00 456.01 2.01
24748 454.67 457.98 3.31
25168 455.30 458.76 3.46
25927 456.00 459.18 3.18
27603 457.77 460.02 2.25
28791 458.92 460.27 1.35
29206 458.86 460.22 1.36
Denton Tap Road
30531 460.17 460.56 0.39
32479 464.54 464.63 0.09
34218 465.28 465.28 0.00
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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Cross Section
100-Year WSEL (ft)
FEMA Halff Difference
35888 466.03 466.03 0.00
State Highway 121
Table 4.3: USACE Water Surface Elevation Comparison
Location 100-Year WSEL (ft)
USACE Halff Difference
MacArthur Boulevard 455.85 454.45 1.40
Denton Tap Road 458.58 460.22 -1.64
State Highway 121 465.70 466.03 -0.33
Table 4.4: 1-D Steady vs Unsteady Comparison
100-Year WSEL Comparison (ft)
Cross
Section
1-D
Steady
1-D
Unsteady
Difference
(Unsteady
– Steady)
Approximate End of Levee (Along Denton
Creek)
17892 452.83 453.52 0.69
17991 452.84 453.53 0.69
18114 452.9 453.52 0.62
18223 452.9 453.53 0.63
18335 452.89 453.53 0.64
18479 452.89 453.54 0.65
18592 452.9 453.56 0.66
18646 452.92 453.58 0.66
18826 453.02 453.64 0.62
19071 453.08 453.69 0.61
19223 453.08 453.73 0.65
19421 453 453.78 0.78
19614 453.29 453.94 0.65
19742 453.38 454 0.62
19807 453.41 454.03 0.62
20012 453.5 454.1 0.6
20224 453.57 454.12 0.55
20314 453.63 454.15 0.52
20397 453.79 454.27 0.48
20579 454.05 454.42 0.37
20616 454.06 454.42 0.36
20728 454.1 454.46 0.36
20873 454.12 454.46 0.34
100-Year WSEL Comparison (ft)
Cross
Section
1-D
Steady
1-D
Unsteady
Difference
(Unsteady
– Steady)
20944 454.15 454.47 0.32
21059 454.17 454.45 0.28
21169 454.31 454.54 0.23
21275 454.42 454.64 0.22
21354 454.45 454.73 0.28
21416 454.48 454.75 0.27
21558 454.62 454.83 0.21
21611 454.65 454.88 0.23
21798 454.8 454.97 0.17
21822 454.8 454.97 0.17
22080 454.98 455.05 0.07
MacArthur Boulevard
22211 455.32 455.32 0
22424 455.56 455.48 -0.08
22616 455.74 455.59 -0.15
22795 455.87 455.67 -0.2
22997 456.1 455.82 -0.28
23063 456.16 455.89 -0.27
23198 456.14 455.86 -0.28
23229 456.1 455.77 -0.33
23413 456.19 455.81 -0.38
23506 456.48 456.01 -0.47
23628 456.7 456.14 -0.56
23802 457.52 456.42 -1.1
Pedestrian Bridge
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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100-Year WSEL Comparison (ft)
Cross
Section
1-D
Steady
1-D
Unsteady
Difference
(Unsteady
– Steady)
23868 457.55 456.25 -1.3
24058 457.55 456.3 -1.25
24099 457.55 456.58 -0.97
24198 457.56 456.9 -0.66
24264 457.05 457.02 -0.03
24519 457.88 457.6 -0.28
24748 457.52 457.98 0.46
24947 457.63 458.09 0.46
25168 458.69 458.76 0.07
25356 458.7 459.03 0.33
25499 458.71 458.98 0.27
25558 458.71 459.07 0.36
25760 458.35 459.07 0.72
26087 458.89 459.37 0.48
26383 459.48 459.85 0.37
26688 459.48 459.9 0.42
26970 459.49 459.9 0.41
27041 459.5 459.91 0.41
27145 459.52 459.94 0.42
27672 459.57 460.02 0.45
27892 459.49 460.07 0.58
28217 459.7 460.18 0.48
28380 459.81 460.24 0.43
29050 459.9 460.27 0.37
29206 459.92 460.22 0.3
Denton Tap Road
29331 460.22 460.45 0.23
29530 460.85 460.63 -0.22
30063 460.91 460.66 -0.25
30366 460.94 460.67 -0.27
30424 460.94 460.67 -0.27
100-Year WSEL Comparison (ft)
Cross
Section
1-D
Steady
1-D
Unsteady
Difference
(Unsteady
– Steady)
30531 460.96 460.56 -0.4
30779 461.22 460.96 -0.26
31216 461.51 461.16 -0.35
31611 461.59 461.21 -0.38
31797 462.15 461.28 -0.87
31949 462.03 461.03 -1
32105 461.97 464.22 2.25
32231 462.53 464.5 1.97
32586 462.82 464.67 1.85
32897 463.88 464.98 1.1
33087 464.29 465.08 0.79
Sanitary Sewer Crossing
33108 464.31 465.1 0.79
33400 464.43 465.13 0.7
33696 464.44 465.18 0.74
33852 464.5 465.21 0.7
34064 464.74 465.29 0.54
34218 464.72 465.28 0.56
34458 464.85 465.34 0.49
34585 465.02 465.4 0.38
Pedestrian Bridge
34638 465.1 465.37 0.27
34676 465.42 465.39 -0.03
35090 465.7 465.62 -0.08
35504 465.84 465.93 0.09
35681 465.95 465.89 -0.06
35888 465.96 466.03 0.07
36181 466.24 466.26 0.02
36345 466.58 466.43 -0.15
State Highway 121
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Denton County Levee Improvement District No. 1
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C. 2D MODEL DEVELOPMENT
A 2D unsteady flow model using HEC-RAS v5.03 was developed to model the channel forming (bankfull)
discharge, 1-, 2-, 5-, and 10-year events from downstream of State Highway 121 to the Sandy Lake Road
crossing with the Elm Fork Trinity. The purpose of the 2D simulation was to evaluate the velocity patterns
within the channel and flow interactions between the DCLID-1 flood control channel and the old Denton
Creek channel. The 2D model was also used to evaluate how the existing velocity patterns are impacted
per each alternative. Computational stability and volume balance were evaluated throughout the process
to ensure accurate results.
Model Development
A 2D mesh with a 20 foot grid cell size was created throughout the study area using a combination of 2009
LiDAR and survey topographic data. The limits of the mesh extend from State Highway 121 to Sandy Lake
Road. Breaklines were placed along locations of grade changes, channel centerlines, channel banks and
toes to better align grid cell faces with the direction of flow. This enforces an elevation at the faces of the
cells so that the water surface elevation must be greater than the breaklines in order to flow into the next
cell. After the mesh was defined, a terrain, inflow hydrographs, Manning’s n-value polygon, and boundary
conditions were added.
Terrain Modification
The terrain used in the 2D analysis was based on a combination of 2009 LiDAR and survey data. To
generate an overall terrain that encompasses these two sources, a TIN was created from surveyed data
points within the channel and spliced into the 2009 LiDAR. This creates the overall terrain within the mesh
that reflects the detailed survey data within the channel bank limits and the LiDAR to define the overbank
geometry.
Manning’s n-value
Using ArcGIS, a Manning’s n-value polygon was created based on landuse data and cover type. The
polygon contains the different land use and n-values within the mesh area. The n-values were maintained
consistent with the 1D model and range from open space to heavy tree cover. One variation between the
1D and 2D model n-values is areas where buildings and structures are located. In the 2D model building
locations were assigned a high n-value (0.3) to account for flow conditions in the presence of the structure.
Streets and roads within these areas were assigned a lower n-value (0.02). This approach provides greater
detail in model results when flow occurs in these areas than does the composite values typically used in
the 1D model.
Boundary Conditions
The boundary conditions used within the 2D model were based on the inflow hydrographs and normal
depth. Similar to the 1D unsteady model, the inflow hydrographs allow flow to enter the mesh at specified
locations and normal depth allows flow to leave the mesh if water surface elevations exceed the mesh
boundary elevations. Inflow hydrographs were obtained from the Denton Creek HEC-HMS model and are
consistent with the 1D unsteady model inflow hydrographs. Normal depth values were set with the slope
within that reach. Inflow hydrographs were placed at along the boundaries of the 2D mesh at locations
where flow enters the channels.
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Denton County Levee Improvement District No. 1
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Simulation Parameters
A three second time step was selected as the computational time interval to satisfy the Courant Equation.
The Courant Equation, shown below, takes into consideration the velocity of the flood wave (or average
channel velocity), computational time-step, and average cell size. The Courant number normally is set to
one (1). Therefore, the Courant Equation was solved for the time step used in the simulation which yielded
a recommended time step of three seconds.
% ∗ ’(
’) * 1.0 . max 3.0
Model Validation
The validation of the 1D/2D unsteady model and 2D unsteady model was determined using the May 2015
storm event gage data only. No high water marks were captured or surveyed as part of this event. There
are two USGS stream gages within the study area. One gage is located at the downstream face of State
Highway 121 (SH 121) along Denton Creek and the other is at the Carrollton Dam just downstream of
Sandy Lake Road along the Elm Fork Trinity River. Table 4.5 shows the results from the May 2015 event
model simulations. The 2D model was able to reproduce the gage data at the Carrollton Dam (the 1D/2D
unsteady model does not extend to the Carrollton Dam). Reproduction of gage date at SH 121 was not
successful in either the 1D/2D unsteady or the 2D unsteady model. The differences between the gage
data and model water surface elevations at SH 121 is thought to be because the gage datum may not
have been calibrated or was out of its original location during the event. Survey data shows a flowline
elevation of 444.59 feet at the downstream end of State Highway 121 whereas the gage datum near this
location is 439.11 feet. This is a 5.48 feet difference in elevation between flowlines, which may be the
cause for the differences in water surface elevations at this location. The measured discharge at this
location was also much lower than the revised model discharge at this location. The measured discharge
at the gage was closer to the 1-year frequency storm discharges calculated as part of this study. However,
after investigating the rainfall data during this event, the precipitation depths indicate that this event was
closer to the 10-year frequency storm event which is consistent with reported values for this event.
Therefore, recalibration of this gage by the USGS maybe needed. Additionally, the Wellington Place
Apartments reported flooding to the City of Carrollton during the same event. The models were able to
reproduce flooding at this location for this flood event. Based on the reproduction of results at the
Wellington Place Apartments and the 2D model reproducing water surface elevations within 0.2 feet of
the USGS gage station at the Carrollton Dam for the May/June 2015 flood event, the model is considered
validated.
Table 4.5: May 2015 Storm Event Calibration
Gage Location
Gage
Flowrate
(cfs)
Halff
Flowrate
(cfs)
Gage
WSEL
(ft)
1D
WSEL1
(ft)
2D
WSEL
(ft)
Carrollton Dam 26,600 32,404 444.51 N/A1 444.34
SH 121 3,300 4,597 458.64 461.08 463.70
1The 1D model does not extend to the Carrollton Dam gage
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Results
The 2D model output was evaluated using HEC-RAS version 5.03 to identify locations along the stream
where deposition velocities occur. Additionally, locations where velocities were erosive (5 fps or higher)
were also identified as areas of probable erosion. Information on flow patterns derived from utilizing the
particle tracer feature in RAS Mapper was generated in the 2D model for the interaction between the
flood control channel and old channel within DCLID-1 as well as with the Elm Fork Trinity River. In these
cases the 2D modeling allows the underlying terrain to determine flow patterns at locations where spill
out of the main channel occurs. This is often a limitation of 1D modeling where flow takes an alternative
path that does not follow the direction of the main channel.
Based on the findings of the geomorphology evaluation, the bed material for Denton Creek upstream of
DCLID-1 to State Highway 121 is primarily fine sand which can be transported easily even at low flows.
The 2D model results show several locations along the creek where channel velocities are above maximum
permissible velocities based on the Integrated Stormwater Management (iSWM) Technical Manual
Hydraulic Section for Open Channel Design provided below in Table 4.6. The iSWM Technical Manual was
developed and is maintained by NCTCOG. This area is primarily located upstream of Denton Tap Road
which is consistent with the observations in degrading channel conditions provided during the
geomorphology evaluation. There are also several locations along the creek where channel velocities are
lower than 2 fps where deposition can occur. These areas are primarily located near MacArthur Boulevard
where the flood control channel widens and most of the sediment deposition is observed. Existing 2D
velocity maps can be found in Appendix A, Exhibit 7.
Table 4.6: iSWM Allowable Velocities for Natural Channels
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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Figure 4.1, 4.2 and 4.3 below show the 2-year existing velocity results along an approximately 8,000 foot
stretch of Denton Creek located upstream of Denton Tap Road. Within this area, it can be seen that there
are velocities upwards of 6 feet per second (fps). Based on the results of the geomorphological evaluation,
these high velocities easily erode the fine grained sand within this section of Denton Creek as this section
was identified as part of the sediment supply reach for Denton Creek. Eroded material through this reach
is transported further downstream where it is deposited within the flood control channel of the DCLID-1.
Figure 4.1: 2-year Existing Velocity Map (River Station 36500 to 34000)
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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Figure 4.2: 2-year Existing Velocity Map (River Station 35000 to 31500)
Figure 4.3: 2-year Existing Velocity Map (River Station 31500 to 28500)
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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Figure 4.4 below shows the 2-year existing velocity results along an approximately 1,500 foot stretch of
the upstream limits of DCLID-1 flood control channel located just downstream of Denton Tap Road. Within
this area, it can be seen that at the confluence of Cottonwood Branch there are velocities upwards of 6
feet per second (fps) with a maximum of 9 fps. Denton Tap Road is the approximate downstream limit of
the sediment supply reach within Denton Creek. In the Denton Creek Drainage Study for the City of
Coppell, a grade control structure is proposed below Denton Tap Road in order to prevent further down
cutting of Denton Creek upstream and to reduce the amount of sediment transported to DCLID-1. As per
the findings of the geomorphological report, this is the area where Denton Creek is trying to cut through
towards Cottonwood Branch. The proposed grade control structure at this location would aid in
preventing this. Erosion along the toe of the levee immediately downstream of the weir in the flood
control channel was also observed that includes three existing storm sewer outfalls. Currently, the eroded
toe has been temporarily protected using rock riprap as shown in Figure 4.5. As part of the 1986 Gateway
Reclamation project’s original design, an inline weir was constructed within the flood control channel near
river station 28500 to force low flows into the Old Denton Creek channel. However, due to disposition at
the weir and in the old channel, a majority of the low flows instead travel through the flood control
channel as shown in Figure 4.6.
Figure 4.4: 2-year Existing Velocity Map (River Station 29500 to 28000)
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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Figure 4.5: Eroded Levee Toe Downstream of Cottonwood Branch Confluence
Figure 4.6: Old Denton Creek Deposition (Station 28500)
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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Figures 4.7 and 4.8 below shows the 2-year existing velocity results along an approximately 1,500 foot
stretch of the DCLID-1 flood control channel located at MacArthur Boulevard. Beginning near river station
23000 the DCLID-1 flood control channel begins to widen to approximate channel bottom width of 140
feet. The flood control channel reaches a maximum width of approximately 220 feet 1,200 feet
downstream of MacArthur Road. As a result, velocities within the flood control channel begin to decrease
within these sections to a minimum of 1.73 fps. These low velocities allow the sediment to deposit within
the flood control channel which can be seen in Figure 4.9. It can also be seen at river station 22500 that
the flowline of the flood control channel has begun to cut into the toe of the levee which may could result
in a slope failure if not addressed. Discussed in the Development of Alternatives section is the proposal
to armor and regrade this section of the levee to realign the flowline back towards the center of the
channel.
Figure 4.7: 2-year Existing Velocity Map (River Station 23000 to 20000)
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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Figure 4.8: 2-year Existing Velocity Map (River Station 20000 to 17500)
Figure 4.9: Flood Control Channel Sediment Deposit
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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V. DEVELOPMENT OF ALTERNATIVES
The project scope of study calls for the development of two alternatives with the following objectives:
• Address the sedimentation issues (erosion and deposition) and
• Reducing flood risk by increasing freeboard for the DCLID-1 levee.
Alternatives to reduce or control the 13,000 tons per year of sediment deposition within the DCLID-1 flood
control channel were formulated based on several factors including stream characteristics, velocities,
freeboard, and BFE. Alternatives were evaluated for erosion and sedimentation for the 2-year frequency
storm velocities and 100-year frequency storm water surface elevations for levee freeboard. The two
alternatives analyzed were 1) a sediment trap installed in the downstream portion of DCLID-1 and 2)
installation of berms at upstream intersection locations with the Old Denton Creek channel to force low
flows into the Old Denton Creek channel. Both alternatives include dredging of the flood control and Old
Denton Creek channel, reestablishment of the toe of the levee upstream of MacArthur Boulevard, and
repair of erosion at the upstream weir in the flood control channel. These items have been included in the
cost estimates in Appendix C along with the proposed alternatives. It should be noted that these
alternatives were modeled as stand-alone projects and did not include any City of Coppell alternatives
recommended in the previously mentioned City of Coppell study.
A. ALTERNATIVES ANALYSIS
1. Alternative 1- Sediment Trap
Based on survey data obtained as part of this study, a majority of sedimentation occurs near the
downstream limits of the DCLID-1 where the flood control channel is widest and flows are generally
slower. Alternative 1 involves the construction of a sediment trap within the lower reach of the DCLID-1
flood control channel. This proposed trapezoidal, concrete lined basin located within the channel would
allow sediment to settle and collect within the trap. This would provide a specified area for sediment to
settle for ease of removal. Dredging portions of the flood control channel and Old Denton Creek per the
stable channel design geometry provided in the geomorphology evaluation is included in this alternative
to maintain sediment suspension until it reaches the sediment trap.
Conceptual Design
The design of the sediment trap was based upon the In-Channel Coarse Sediment Trap Best Management
Practice technical paper by Henry R. Hudson of Environmental Management Associates Ltd. (2002) and
the Design of a Smart Sand Trap Construction as a Part of an Interregional Environmental Study by R.
Verhoeven, et. al. from the University of Gent (1996). The trap would be approximately 2,000 feet long,
165 feet wide, 4:1 side slopes and five (5) feet below the existing channel bed elevation and located within
the downstream reach of the flood control channel between river stations 17892 to 20012. Due to the
relatively straight alignment of the flood control channel, concentration of sediment and the position of
Old Denton Creek, constructing a sediment trap within this section of Denton Creek would provide the
optimal configuration for sediment collection. Low velocities within the sediment trap allow sediment to
settle within the limits of the trap and do not progress downstream. Based on the geomorphology
evaluation, approximately 13,000 tons per year of sediment is deposited within the DCLID-1. At this rate,
the sediment trap would be required to be excavated every 7 years. Should the grade control structure
downstream of Denton Tap Road be built as part of the recommendation provided to the City of Coppell,
downcutting upstream of Denton Tap Road will decrease transporting less sediment into DCLID-1 and
therefore sediment removal would be less frequent. This would also result in a lower O&M costs than is
outlined in the costs estimates in Appendix C. During excavation, Old Denton Creek can be utilized as a
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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diversion for ease of operation. An example of a sediment trap configuration similar to the one proposed
in this study is provided below in Figure 5.1.
Figure 5.1: Proposed Sediment Trap Configuration
Model Results
This alternative was evaluated using the 1D steady and 2D unsteady flow hydraulic HEC-RAS v5.03 models
to determine the potential impacts to water surface elevations (WSEL) and velocities. The 2-year
frequency storm velocity mapping for this alternative is provided in Appendix A, Exhibit 9. Velocities
within the sediment trap lowered slightly as a result of the increased width and depth to a minimum of
1.2 fps. Combined with dredging these low velocities promote further sedimentation within this area only.
Velocities downstream of the DCLID-1 within the City of Coppell generally remain unchanged if not
lowered slightly. Table 5.1 shows the 100-year water surface elevation comparison for the proposed
sediment trap. The proposed sediment trap causes no negative impacts upstream along Denton Creek.
However, there are slight rises at the sediment trap and downstream. These are due to the increased
storage area provided by the volume of the sediment trap causing velocities to decrease. The water
surface elevation increases downstream of the proposed sediment trap are also due to shifts in
hydrograph peaks. The maximum water surface elevation rise is 0.05 feet at river station 17410 to 17991.
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
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Table 5.1: Alternative 1 Water Surface Elevation Comparison
Cross
Section
100-Year WSEL (ft)
Difference
(ft)
Revised
Existing Proposed
16702 452.01 452.05 0.04
16956 452.03 452.07 0.04
17197 452.02 452.06 0.04
17410 452.49 452.54 0.05
17649 452.7 452.75 0.05
17892 452.83 452.88 0.05
17991 452.84 452.89 0.05
18114 452.9 452.94 0.04
18223 452.9 452.94 0.04
18335 452.89 452.93 0.04
18479 452.89 452.92 0.03
18592 452.9 452.93 0.03
18646 452.92 452.94 0.02
18826 453.02 453 -0.02
19071 453.08 453.04 -0.04
19223 453.08 453.04 -0.04
19421 453 452.97 -0.03
19614 453.29 453.17 -0.12
19742 453.38 453.21 -0.17
19807 453.41 453.23 -0.18
20012 453.5 453.25 -0.25
20224 453.57 453.25 -0.32
20314 453.63 453.3 -0.33
20397 453.79 453.41 -0.38
20579 454.05 453.61 -0.44
20616 454.06 453.62 -0.44
Advantages
i. Sediment deposition is confined to a specific area for ease of removal
ii. More cost effective option than dredging the entire flood control channel on a frequent
basis
iii. Provides increased flood storage
iv. Less Environmental impacts during sediment removal
v. Helps to reduce flood risk and achieve 100-year FEMA levee freeboard requirements of
3-feet along the levee and 4-feet at bridges for certification.
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
38
Disadvantages
i. Does not address source of sediment
ii. Requires environmental permitting during construction
iii. Sediment will be required to be removed on a consistent basis requiring increased
operating and maintenance (O&M) cost (estimated at every 7 years)
iv. Effectiveness and need is reduced if grade control structure at downstream of Denton
Tap Road is constructed as recommended the City of Coppell drainage study. If
constructed, the frequency of clean out could be less than every 7 years.
v. BFE’s are not reduced back to effective FEMA elevations
vi. Should the new USACE 500-year discharge of 55,500 cfs be adopted by FEMA the levee
will be overtopped violating the terms set in the Plan of Reclamation adopted in 1986
2. Alternative 2- Restore Flows to Old Denton Creek
The second alternative evaluated was to construct six (6) berms in the DCLID-1 flood control channel at
the junctions with the Old Denton Creek channel. The objective of this alternative is to force the low flows
back into the old Denton Creek channel as originally designed in the 1986 Gateway Reclamation project.
This should keep the sediment suspended through the entirety of the Denton Creek. Diverting the low
flows to the Old Denton Creek Channel would thereby increase velocities and prevent the sediment from
depositing. The flood control channel is therefore used for higher flood events where velocities are
generally high and sedimentation is less likely to occur. Per the recommendation of the geomorphological
evaluation, the old channel will need to follow the recommended stable channel design outlined in the
Fluvial-Geomorphic Assessment of the Denton County Levee (DCLID No. 1) Segment of Denton Creek
provided in the Appendix B. Dredging of portions of the flood control channel and Old Denton Creek is
included in this alternative.
This alternative is contingent upon four factors:
1) The flood control channel and Old Denton Creek channel will need to be dredged. This will remove
any sediment that has been deposited since the last dredging project.
2) Per the recommendation of the geomorphological evaluation, the old channel at MacArthur
Boulevard area would not need to be altered in any way. This portion of the channel is in a stable
condition and alternating it could have adverse impacts.
3) Since sediment is transported at a depth of less than six feet as per the geomorphology evaluation
the berms constructed in the flood control channel shall have a minimum height of six feet to
force sediment through Old Denton Creek where velocities are greater and sediment remains
suspended.
4) Berms are to be constructed with a 4:1 front slope and 20:1 back slope. The berms shall be
armored with rock rip rap
Model Results
The simulation for this alternative in the 2D model showed more water flowing through the old channel
with higher, nonerosive, velocities. This shows that at lower frequency events the berms are working as
intended by forcing the water into Old Denton Creek and keeping the sediment from depositing in the
flood control channel. Table 5.2 shows the existing versus proposed 100-year water surface elevations in
the DCLID-1 section of Denton Creek. There are slight rises downstream of DCLID-1 due to shifting in
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
39
hydrograph peaks with a maximum rise of 0.05 feet at cross section 17646 and 17410. This alternative
results in lower water surface elevations upstream of DCLID-1.
Table 5.2: Alternative 2 Water Surface Elevations Comparison
Cross Section 100-Year WSEL (ft) Difference (ft) Existing Proposed
17197 452.02 452.06 0.04
17410 452.49 452.54 0.05
17649 452.7 452.75 0.05
17892 Approximate Beginning of Levee (Along Denton
Creek)
19223 453.08 453.07 -0.01
22146 MacArthur Boulevard
23229 456.1 455.61 -0.49
26383 459.48 459.25 -0.23
29206 459.92 459.68 -0.24
29267 Denton Tap Road
31949 462.03 461.82 -0.21
Advantages
i. Effectively increases velocities to transport sediment through Denton Creek
ii. Utilizes existing old channel
iii. Reduces frequency of dredging required
iv. Helps to reduce flood risk and achieve 100-year FEMA levee freeboard requirements of
3-feet along the levee and 4-feet at bridges for certification.
Disadvantages
i. Requires environmental permitting during construction
ii. Does not address source of sediment
iii. BFE’s are not reduced back to effective FEMA elevations
iv. Should the new USACE 500-year discharge of 55,500 cfs be adopted by FEMA the levee
will be overtopped violating the terms set in the Plan of Reclamation adopted 1985
3. Desilt Flood Control Channel and Old Denton Creek
In order to meet BFE and levee freeboard requirements, the flood control channel and portions of Old
Denton Creek are required to be dredged to remove sediment deposits and restore flood capacity.
Dredged channel geometry was designed using the recommendations for the stable channel design
parameters outlined in the geomorphological evaluation. Limits of dredging within the flood control
channel extends from approximately 700 feet downstream of DCLID-1 to 2,500 upstream of MacArthur
Boulevard. Limits of the Old Denton Creek channel extends from river station 17700 to 21000 and 24100
to 28500. Both of the dredged channels were modeled in conjunction with Alternatives 1 and 2. Dredging
alone was not modeled or provided as a standalone alternative. Estimated cost for dredging an additional
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
40
3 times over an estimated 35-year period is provided in Appendix C. Limits of the proposed dredging is
provided in Appendix A, Exhibit 8.
4. Alternative Summary Comparison
A comparison summary of the water surface elevations and resulting levee freeboard for the proposed
alternatives is shown in Tables 5.3 through 5.6. Each alternative includes dredging of the flood control
channel and Old Denton Creek. FEMA effective results were included in the comparison. This comparison
was based on the 1-D steady state results. FEMA effective 500- (36,200 cfs), and CDC 500-year (55,500
cfs) water surface elevations are included as is levee freeboard for each flood profile. The current 2012
FEMA effective top of levee elevation were used for the freeboard comparison. Tables 5.3 and 5.4
compare the 100- and 500-year FEMA effective, Halff revised existing, Alternative 1, and Alternative 2
water surface elevations with the 2012 FEMA top of levee elevations. Tables 5.5 and 5.6 compare the
100- and 500-year CDC, Halff revised existing, Alternative 1, and Alternative 2 water surface elevations
with the 2012 FEMA top of levee elevations. This was done to show the scenario if the new CDC 500-year
discharge of 55,500 cfs were to become effective. It should be noted that the new CDC 500-year discharge
is not contained within the levee and at several locations overtops by several feet regardless of selected
alternative. Therefore, should this discharge be adopted by FEMA as effective, modifications may be
required to the levee to contain and meet the freeboard requirements outlined in the Plan of Reclamation.
Table 5.3: FEMA vs Halff 100 Year Comparison
River Station Discharge Top of Levee 100 Year Water Surface Elevation Freeboard³
FEMA Halff FEMA¹ Halff 1985² 2012¹ FEMA¹ Rev Ex Alt 1 Alt 2 FEMA¹ Rev Ex Alt 1 Alt 2
(cfs) (cfs) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft)
- 17892 Approximate Beginning of Levee (Along Denton Creek)
19647 18335 20600 20600 458 457.46 453.11 452.89 452.93 452.93 4.35 4.57 4.53 4.53
19770 18592 20600 20600 458 457.36 453.13 452.9 452.93 452.93 4.23 4.46 4.43 4.43
20025 18826 20600 20300 458 457.19 453.14 453.02 453 453.02 4.05 4.17 4.19 4.17
20980 19421 20600 20300 458.2 457.44 453.17 453 452.97 452.99 4.27 4.44 4.47 4.45
21260 19742 20600 20300 458.4 457.71 453.28 453.38 453.21 453.28 4.43 4.33 4.50 4.43
21635 20314 20600 20300 458.5 457.61 453.27 453.63 453.3 453.4 4.34 3.98 4.31 4.21
22370 21059 20600 20300 459.7 458.76 453.49 454.17 453.6 453.69 5.27 4.59 5.16 5.07
23800 21798 20600 20300 460.4 459.81 453.85 454.8 454.42 454.5 5.96 5.01 5.39 5.31
- 22146 MacArthur Boulevard
24700 22616 20600 20300 460.7 460.72 454.16 455.74 455.26 455.33 6.56 4.98 5.46 5.39
25530 23229 20600 20300 461 461.35 454.24 456.1 455.55 455.61 7.11 5.25 5.80 5.74
26830 24519 21300 20300 463 462.68 455.28 457.88 457.28 457.33 7.40 4.8 5.40 5.35
- 24550 Approximate End of Levee
¹Current Effective FEMA Model (2012) Top of Levee
²Design Height of Levee from 1986 Gateway Reclamation Project
³Compared to Effective FEMA Top of Levee
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
41
Table 5.4: FEMA vs Halff 500-Year Comparison
River Station Discharge Top of Levee 500 Year Water Surface Elevation Freeboard³
FEMA Halff
FEMA¹ Halff 1985² 2012¹ FEMA¹ Rev Ex Alt 1 Alt 2 FEMA¹ Rev Ex Alt 1 Alt 2
(cfs) (cfs) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft)
- 17892 Approximate Beginning of Levee (Along Denton Creek)
19647 18335 36200 36200 458 457.46 454.51 455.04 455.02 455.02 2.95 2.42 2.44 2.44
19770 18592 36200 36200 458 457.36 454.53 455.07 455.04 455.05 2.83 2.29 2.32 2.31
20025 18826 36200 36200 458 457.19 454.55 455.13 455.08 455.1 2.64 2.06 2.11 2.09
20980 19421 36200 36200 458.2 457.44 454.6 455.08 455.01 455.02 2.84 2.36 2.43 2.42
21260 19742 36200 36200 458.4 457.71 454.85 455.61 455.39 455.46 2.86 2.1 2.32 2.25
21635 20314 36200 36200 458.5 457.61 454.82 456.01 455.52 455.64 2.79 1.6 2.09 1.97
22370 21059 36200 36200 459.7 458.76 455.35 457.01 456.11 456.22 3.41 1.75 2.65 2.54
23800 21798 36200 36200 460.4 459.81 456.4 458.09 457.57 457.65 3.41 1.72 2.24 2.16
- 22146 MacArthur Boulevard
24700 22616 36200 36200 460.7 460.72 456.67 460.48 459.74 459.8 4.05 0.24 0.98 0.92
25530 23229 36200 36200 461 461.35 456.5 460.71 459.96 460.02 4.85 0.64 1.39 1.33
26830 24519 36200 36200 463 462.68 458.6 462.61 461.57 461.61 4.08 0.07 1.11 1.07
- 24550 Approximate End of Levee
¹Current Effective FEMA Model (2012) Top of Levee
²Design Height of Levee from 1986 Gateway Reclamation Project
³Compared to Effective FEMA Top of Levee
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
42
Table 5.5: USACE vs Halff 100-Year Comparison
River Station Discharge Top of Levee 100 Year Water Surface Elevation Freeboard³
USACE Halff
USACE Halff 1985¹ 2012² USACE Rev Ex Alt 1 Alt 2 USACE Rev Ex Alt 1 Alt 2
(cfs) (cfs) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft)
17892 17892 Approximate Beginning of Levee (Along Denton Creek)
18335 18335 22200 20600 458 457.46 453.19 452.89 452.93 452.93 4.27 4.57 4.53 4.53
18592 18592 22000 20600 458 457.36 453.23 452.9 452.93 452.93 4.13 4.46 4.43 4.43
18826 18826 22000 20300 458 457.19 453.25 453.02 453 453.02 3.94 4.17 4.19 4.17
19421 19421 21000 20300 458.2 457.44 453.33 453 452.97 452.99 4.11 4.44 4.47 4.45
19742 19742 21000 20300 458.4 457.71 453.57 453.38 453.21 453.28 4.14 4.33 4.50 4.43
20314 20314 21000 20300 458.5 457.61 453.74 453.63 453.3 453.4 3.87 3.98 4.31 4.21
21059 21059 21000 20300 459.7 458.76 454.4 454.17 453.6 453.69 4.36 4.59 5.16 5.07
21798 21798 21000 20300 460.4 459.81 455.27 454.8 454.42 454.5 4.54 5.01 5.39 5.31
22145 22146 MacArthur Boulevard
- 22616 - 20300 460.7 460.72 - 455.74 455.26 455.33 - 4.98 5.46 5.39
23229 23229 21000 20300 461 461.35 456.45 456.1 455.55 455.61 4.90 5.25 5.80 5.74
24519 24519 21000 20300 463 462.68 457.9 457.88 457.28 457.33 4.78 4.8 5.40 5.35
- 24550 Approximate End of Levee
¹Design Height of Levee from 1986 Gateway Reclamation Project
²Current Effective FEMA Model (2012) Top of Levee
³Compared to Effective FEMA Top of Levee
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
43
Table 5.6: USACE vs Halff 500-Year Comparison
River Station Discharge Top of Levee 500 Year Water Surface Elevation Freeboard³
USACE Halff
USACE Halff 1985¹ 2012² USACE Rev Ex Alt 1 Alt 2 USACE Rev Ex Alt 1 Alt 2
(cfs) (cfs) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft)
17892 17892 Approximate Beginning of Levee (Along Denton Creek)
18335 18335 55,500 55,500 458 457.46 456.32 456.88 456.87 456.87 1.14 0.58 0.59 0.59
18592 18592 55,500 55,500 458 457.36 456.37 456.92 456.9 456.9 0.99 0.44 0.46 0.46
18826 18826 55,500 55,500 458 457.19 456.42 456.98 456.94 456.95 0.77 0.21 0.25 0.24
19421 19421 55,500 55,500 458.2 457.44 456.32 456.8 456.75 456.75 1.12 0.64 0.69 0.69
19742 19742 55,500 55,500 458.4 457.71 457.14 457.61 457.35 457.44 0.57 0.1 0.36 0.27
20314 20314 55,500 55,500 458.5 457.61 457.55 458.12 457.5 457.67 0.06 -0.51 0.11 -0.06
21059 21059 55,500 55,500 459.7 458.76 459.45 459.64 458.49 458.64 -0.69 -0.88 0.27 0.12
21798 21798 55,500 55,500 460.4 459.81 461.51 461.27 460.69 460.78 -1.70 -1.46 -0.88 -0.97
22145 22146 MacArthur Boulevard
- 22616 - 55,500 460.7 460.72 - 462.92 462.39 462.44 - -2.2 -1.67 -1.72
23229 23229 55,500 55,500 461 461.35 464.57 463.1 462.56 462.61 -3.22 -1.75 -1.21 -1.26
24519 24519 55,500 55,500 463 462.68 467.18 466.2 465.22 465.26 -4.50 -3.52 -2.54 -2.58
- 24550 Approximate End of Levee
¹Design Height of Levee from 1986 Gateway Reclamation Project
²Current Effective FEMA Model (2012) Top of Levee
³Compared to Effective FEMA Top of Levee
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
44
5. No Action Option
Per the findings of the geomorphology evaluation, continued degradation of Denton Creek upstream of
Denton Tap Road is expected resulting in more sediment transported through and deposited in the DCLID-
1 section of Denton Creek. It is estimated that over a minimum of 35 years of similar deposition rates, an
additional 455,886 tons of sedimentation could be expected within DCLID-1. Therefore, if no action is
taken (this includes the grade control structure not being built near Denton Tap Road), the flood control
channel will continue to fill with sediment further reducing the flood capacity of Denton Creek, increasing
flood risk and ultimately resulting in the loss of levee certification.
B. COST ESTIMATES
In order to evaluate the alternatives on an economic basis, Halff performed conceptual level cost
estimates for the alternatives. The components included in the alternatives evaluated were itemized and
estimated unit costs determined based on the Texas Department of Transportation (TxDOT) Average Unit
Low Bid Prices for Dallas County. All alternatives and cost estimates include dredging of the flood control
channel and Old Denton Creek, the repair of the eroded slope along the flood control channel downstream
of Denton Tap Road, and the armoring of the toe of the flood control channel upstream of MacArthur
Boulevard. A construction contingency allowance (40% of the estimated construction cost) and a
professional design and construction phase services fee (15% of estimated construction cost) were added
to determine the total estimated project cost. All cost are based on 2017 US dollars. Table 5.7 provides a
summary of cost estimates of the evaluated alternatives. The itemized cost estimates for each alternative
can be found in Appendix C.
Table 5.7: Summary of Cost Estimates
Alternative Alternative Description Cost1
1 Sediment Trap $ 28,200,0002
2 Restore Flows to Old Denton Creek $ 9,400,000
- Dredging of Flood Control and Old Denton Creek Channels $ 37,400,0002
1. Includes 40% Construction Contingency, 15% Engineering Fee
2. Includes cost of future dredgings for 35-year period
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
45
VI. CONCLUSIONS
The Denton Creek Drainage Study was commissioned by the Denton County Levee Improvement District
No. 1 (DCLID-1) to develop alternatives for flood risk reduction focusing on sedimentation within the reach
of Denton Creek controlled by the DCLID-1. Since the construction of the flood control channel as part of
the 1986 Gateway Reclamation project, deposition of eroded material originating upstream of the DCLID-
1 has been observed raising concern over flood capacity and levee certification. A portion of the Old
Denton Creek channel near MacArthur Road was previously dredged in 2002. With the aid of Dr. Peter
Allen and Dr. John Dunbar of Baylor University along with Dr. Jeff Arnold of USDA, a geomorphology
evaluation was conducted to determine the source of sedimentation and provide stable channel design
recommendations. Two (2) conceptual level structural alternatives were developed and evaluated
including the construction of a sediment trap and the construction of berms within the flood control
channel to divert low flows to Old Denton Creek as originally designed in the 1986 Gateway Reclamation
project. While Alternative 1 provides a convenient location for deposition and removal and lowers water
surface elevations through the DCLID-1, it does not address the source of sedimentation. Alternative 2
effectively increases velocities by restoring flows to Old Denton Creek thereby keeping sediment
suspended and reducing the risk of deposition. Dredging alone does not address the sediment source and
would be required on a frequent basis for a minimum of 35-years as the stream reaches an equilibrium.
Therefore, Alternative 2 is recommended for the DCLID-1 controlled portion of Denton Creek.
Construction of a grade control structure downstream of Denton Tap Road as recommended to the City
of Coppell per Denton Creek Drainage Study for the City of Coppell will prevent further downcutting along
Denton Creek upstream of Denton Tap Road thereby reducing the sediment supply to the DCLID-1. If no
alternative is implemented further sedimentation can be expected within the flood control channel for at
least the next 35 years. This sedimentation will result in reduced levee freeboard and potential loss of
levee certification with FEMA. Additional operating and maintenance cost associated with keeping the
channel dredged could also be expected.
Denton Creek Drainage Study
Denton County Levee Improvement District No. 1
46
VII. REFERENCES
1. US Army Corps of Engineers. HEC-RAS River Analysis System, 2D Modeling User’s Manual.
February, 2016.
2. City of Dallas, iSWM Criteria Manual for Site Development and Construction. 2010.
3. United States Department of Agriculture. Flow Changing Techniques- Technical Supplement 14H.
August, 2007.
4. Colorado Floodplain and Stormwater Criteria Manual. Chapter 13 Hydraulic Analysis and Design
Section 6 Drop Structures. September, 2008.
5. Hudson, H.R. In-Channel Coarse Sediment Trap, Environmental Management Associates, LTD.
July, 2002
6. R. Verhoeven, M. Huygens, L. Van Poucke, J.V. Witter, H. Hakvoort, Design of A Smart Sand Trap
Construction as a Part of Interregional Environmental Study, University of Gent, 1996
APPENDIX A: FIGURES
MAC ARTHUR BLVDFREEPORT PKWYBELT LINE RDDENTON TAP RDLAKES I DE P KW Y
NORTHWEST HIG HWAY
BELT LINE RD
"B 2499
"B1171
"B 3040
LUNA RDOLD DENTON RD"B 2281
SAMRAYBU R N TO LLW AYDallas CountyDenton County
Tarrant County
Tarrant CountyDallas CountyDenton County
Flower Mound
Southlake
Irving
Dallas
Farmers Branch
Carrollton
Lewisville
Coppell
Denton Creek
Elm Fork TrinityCottonwoodBranch
GrapevineLake
DFW AIRPORT
Study Stream
Non-Study Stream
DCLID-1* Levee
Major Road
Local Road
County Boundary
Political Boundary
Grapevine Lake
Project Area
*Denton County Levee Improvement District No. 1
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ExhibitDenton Creek
´Exhibit 1Denton Creek Drainage StudyProject
Project Area MapTitle
Watershed
0 2,500 5,000
Scale in Feet1 inch = 5,000 feet
?d
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Aerial Imagery from 2015 Woolpert
KEY TO FEATURES
MAC ARTHUR BLVDFREEPORT PKWYBELT LINE RDDENTON TAP RDLAKES I DE P KW Y
NORTHWEST HIG HWAY
BELT LINE RD
"B 2499
"B1171
"B 3040
LUNA RDOLD DENTON RD"B 2281
SAMRAYBU R N TO LLW AYDCLID_0260
DCLID_0300
DCLID_0120
DCLID_0290
DCLID_0280
DCLID_0020
DCLID_0060
DCLID_0150
DCLID_0230
DCLID_0070
DCLID_0040
DCLID_0200
DCLID_0080
DCLID_0270
DCLID_0250
DCLID_0240
DCLID_0170
DCLID_0010
DCLID_0160
DCLID_0190
DCLID_0100
DCLID_0130
DCLID_0180
DCLID_0090
DCLID_0030
DCLID_0140
DCLID_0210
DCLID_0050
DCLID_0110
Dallas CountyDenton County
Tarrant County
Tarrant CountyDallas CountyDenton County
Flower Mound
Southlake
Irving
Dallas
Carrollton
Lewisville
Coppell
Denton Creek
Elm Fork TrinityCottonwoodBranch
GrapevineLake
DFW AIRPORT
Study Stream
Non-Study Stream
DCLID-1* Levee
Major Road
Local Road
County Boundary
Political Boundary
Drainage Area
Grapevine Lake
Project Area
*Denton County Levee Improvement District No. 1
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ExhibitDenton Creek
´Exhibit 2Denton Creek Drainage StudyProject
Drainage Area MapTitle
Watershed
0 2,500 5,000
Scale in Feet1 inch = 5,000 feet
?d
%&c(
Aerial Imagery from 2015 Woolpert
DCLID_0110 0.01DCLID_0050 0.02DCLID_0210 0.04DCLID_0140 0.05DCLID_0030 0.08DCLID_0090 0.08DCLID_0180 0.1DCLID_0130 0.13DCLID_0100 0.16DCLID_0190 0.22DCLID_0160 0.25DCLID_0010 0.28DCLID_0170 0.34DCLID_0240 0.40DCLID_0250 0.42DCLID_0270 0.42DCLID_0080 0.5DCLID_0200 0.62DCLID_0230 0.76DCLID_0040 0.81DCLID_0150 0.93DCLID_0070 1.02DCLID_0060 1.22DCLID_0020 1.29DCLID_0280 1.34DCLID_0290 1.68DCLID_0120 3.02DCLID_0300 3.12DCLID_0260 6.11
Area (mi²)Drainage Area
KEY TO FEATURES
FREEPORT PKWYBELT LINE RDDENTON TAP RDLAKES I DE P KW Y
NORTHWEST HIG HWAY
BELT LINE RD
"B 2499
"B1171
"B 3040
LUNA RDOLD DENTON RD"B 2281
SAMRAYBU R N TO LLW AYDCLID_0260
DCLID_0300
DCLID_0120
DCLID_0290
DCLID_0280
DCLID_0020
DCLID_0060
DCLID_0150
DCLID_0230
DCLID_0070
DCLID_0040
DCLID_0200
DCLID_0080
DCLID_0270
DCLID_0250
DCLID_0240
DCLID_0170
DCLID_0010
DCLID_0160
DCLID_0190
DCLID_0100
DCLID_0130
DCLID_0180
DCLID_0090
DCLID_0030
DCLID_0140
DCLID_0210
DCLID_0050
DCLID_0110
DCLID_J0040
DCLID_J0060
DCLID_J0080
DCLID_J0090
DCLID_J0100
DCLID_J0120
DCLID_J0170
DCLID_J0290DCLID_J0280DCLID_J0270DCLID_J0260
DCLID_J0240
DCLID_J0230
DCLID_J0180
DCLID_J0130
DCLID_J0150 DCLID_J0120
Outfall
Denton Creek
Elm Fork Trinity
CottonwoodBranch
GrapevineLake
DFW AIRPORT
Study Stream
Non-Study Stream
DCLID-1* Levee
Major Road
Local Road
Drainage Area
Grapevine Lake
Project Area
Flow Change Location
*Denton County Levee Improvement District No. 1
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ExhibitDenton Creek
´Exhibit 3Denton Creek Drainage StudyProject
Flow Change Locations MapTitle
Watershed
0 2,500 5,000
Scale in Feet1 inch = 5,000 feet
?d
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Aerial Imagery from 2015 Woolpert
** Discharge controlled by releases from Grapevine LakeDCLID_J0040 2.45 13,000**DCLID_J0060 3.7 13,000**DCLID_J0080 5.22 13,000**DCLID_J0090 5.3 13,000**DCLID_J0100 5.46 13,000**DCLID_J0120 8.49 13,000**DCLID_J0130 8.62 13,000**DCLID_J0150 9.59 13,000**DCLID_J0170 10.18 13,000**DCLID_J0180 10.28 13,000**DCLID_J0200 11.13 13,000**DCLID_J0230 11.93 13,100DCLID_J0240 12.33 13,100DCLID_J0260 18.86 13,200DCLID_J0270 19.28 20,800DCLID_J0280 20.62 20,900DCLID_J0290 22.3 21,200Outfall25.42 23,000
Cumulative Are a (mi²)HMS Node 100 -Year Discharge (cfs)
KEY TO FEATURES
Denton Creek
Elm Fork TrinityCottonwoodBranch
GrapevineLake
DFW AIRPORT
Study Stream
Non-Study Stream
DCLID-1* Levee
Major Road
Local Road
County Boundary
Political Boundary
Drainage Area
Grapevine Lake
Denton Creek Hydrologic Soils
Soil Group A
Soil Group B
Soil Group C
Soil Group D
*Denton County Levee Improvement District No. 1
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´Exhibit 4Denton Creek Drainage StudyProject
Hydrologic Soils MapTitle
Watershed
0 2,500 5,000
Scale in Feet1 inch = 5,000 feet
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Aerial Imagery from 2015 Woolpert
KEY TO FEATURES
Denton Creek
Elm Fork TrinityCottonwoodBranch
GrapevineLake
DFW AIRPORT
Study Stream
Non-Study Stream
DCLID-1* Levee
Major Road
Local Road
County Boundary
Political Boundary
Drainage Area
Grapevine Lake
*Denton County Levee Improvement District No. 1
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´Exhibit 5Denton Creek Drainage StudyProject
Land Use MapTitle
Watershed
0 2,500 5,000
Scale in Feet1 inch = 5,000 feet
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Denton Creek Land Use (Fully Developed)AirportCemeteriesCommercialCommunicationEducationFarmlandFlood controlGroup quartersHotel/motelIndustrialInstitutional/semi-publicMobile homeMulti-familyOffice
ParkingParks/recreationRailroadRanch landResidential acreageRetailRoadwayRunwaySingle familySmall water bodiesTimberlandTransportationUnder constructionUtilitiesVacantWater
Aerial Imagery from 2015 Woolpert
KEY TO FEATURES
Denton Creek
CottonwoodBranch
Coppell
Dallas
Irving
CarrolltonLewisville
Panel 01 of 05
FREEPORT PKWYDENTON TAP RDMAC ARTHUR BLVDBELT LINE RD
Panel 02 of 05
Panel 03 of 05
Panel 04 of 05
Panel 05 of 05
Denton County
Dallas County
SANDY LAKE RD SAM RAYBURN TOLLWAYST. Anne Catholic Parish
Coppell City Hall
Coppell MiddleSchool North Denton CreekElementary School
Vista Ridge Athletic Complex
Lakeside Elementary School
DallasGun Club
*Denton County Levee Improvement District No. 1
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ExhibitDenton CreekExhibit 6Index MapDenton Creek Drainage StudyProject
Hydraulic Work MapTitle
Watershed
Study Stream
Non-Study Stream
DCLID-1* Levee
Major Road
Local Road
Panel Extent
County Boundary
Political Boundary
Effective FEMA 100 Year Zone Type
A
AE
FLOODWAY
X
X With Reduced Risk Due to Levee
0 1,000 2,000
Scale in Feet
1 inch = 2,000 feet ´
Aerial Imagery from 2015 Woolpert
KEY TO FEATURES
33696337663385236345321053223131949340643509034141346763421834892352783397035215344583458534638 334003332633580324793550433087 3310832586331643568135888357703618136036328973161131660A C E R D
CANYON DR
GIFFORD DRMADISON STLAYTON DR
COPPERSTONE TRL
AVALON LN
GRAYWOOD LN PEDMORE DRWESTMINSTER WAY
LOXLEY DR
AUBURN WAYWESTMINSTER CTFAIRLANDS CIRCANEMOUNT LNCOMPTON CTCLIFTON CT
MARTEL CTB L A C K F I E L D D R
GIFFORD CT
SH EF FIE LD C THAMPT
ON DRCROMWELL CTJOSHUA LN
BUTTONWOOD DRBANKERS COTTAGE LNHARDWICK CT
GRAYWOOD CTPA RKW A YSAM RAYBURN TOLLWAY
DentonCreek
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470460
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Study Stream
Non-Study Stream
Cross Section
Index Contour*
Intermediate Contour*
Major Road
Local Road
Political Boundary
100 Year Revised Existing (FullyDeveloped) Conditions
Effective FEMA 100 Year
*Contours generated from 2009 TNRIS LiDAR and 2016 Halff Survey Data.ExhibitDenton Creek
´
Denton Creek Drainage StudyProject
Hydraulic Work MapTitle
Watershed
0 200 400
Scale in Feet
1 inch = 400 feet
Exhibit 6Panel 1 of 5Aerial Imagery from 2015 Woolpert
KEY TO FEATURES
27892295302724827041269702760326621271452729826828 2668827672281222745628217287912858628380285103210532231319493179729331292062905028891300633025730366 304243077930531311053121631376316113166029817DENTON TAPNATCHES TRCE
LY N D S IE D R
MARTEL LN
COWBOY DRMADISON STLEVEE PLWAVE
R
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FLIN TSH IR E W A YBANKERS COTTAGE LNRU STIC M EA D O W W AYPARKWAY
NATCHES TRCE
SAM RAYBURN TOLLWAY
Cop p ell Mi dd l e School North Denton Creek Elementary School
Andrew Brown ParkDentonCreek
CottonwoodBranchatDenton
460
450
440
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6
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Study Stream
Non-Study Stream
Cross Section
Index Contour*
Intermediate Contour*
Major Road
Local Road
Political Boundary
100 Year Revised Existing (FullyDeveloped) Conditions
Effective FEMA 100 Year
*Contours generated from 2009 TNRIS LiDAR and 2016 Halff Survey Data.ExhibitDenton Creek
´
Denton Creek Drainage StudyProject
Hydraulic Work MapTitle
Watershed
0 200 400
Scale in Feet
1 inch = 400 feet
Exhibit 6Panel 2 of 5Aerial Imagery from 2015 Woolpert
KEY TO FEATURES
227952261622424232292341323506220802221121798
236282182225168253562724827041 2161125499269702760326621271452729826828 266882767223802255582745625760259272608726194249472474823868263832451924099
24058
242642155824198
2299723063
23198
MOORELODGE RDSAMUEL BLVDPHI
LL
I
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PA R KV IE W P L
ALEX DR
DUNCAN DR
CRIBBS DR
KYLE DR PARKWOOD
L
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MEADOWOOD LN
JOHNSON DR
HARWELL STPLUMLEE PL
THOM PSON DR
STI
LL
FOREST DRWILLINGHAM PLHARRISON DR
COATS ST
GLEN LAKES DR
MICHELLE PL
C
R
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T
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CLAYTON CIRBENT TREE CTPRESTWICK CTS
P
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CLEAR HAVEN DRENCLAVES CTKAILEY WAYC
R
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CT
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QUIET VALLEY DRPARKWAYSAM RAYBURN TOLLWAYO l dDen t o nCreek
DentonCreekAndrew Brown Park 4504404604 7 0
460
460450450
4704704 6 0
4604404704604
7
0
4 5 0470 4604604 6 047045045046 0
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466466
4 6 2438472456 4 4 8
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5
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456
Study
Non-Study
DCLID-1*
Cross Section
Index Contour**
Intermediate Contour**
Major Road
Local Road
Political Boundary
100 Year Revised Existing (FullyDeveloped) Conditions
Effective FEMA 100 Year
**Contours generated from 2009 TNRIS LiDAR and 2016 Halff Survey Data.ExhibitDenton Creek
´
Denton Creek Drainage StudyProject
Hydraulic Work MapTitle
Watershed
0 200 400
Scale in Feet
1 inch = 400 feet
Exhibit 6Panel 3 of 5Aerial Imagery from 2015 Woolpert*Denton County Levee Improvement District No. 1
KEY TO FEATURES
1799118114178921822318335227952261622997
23063
2242423198
23229184792341318592235062208022211176491864621798
2362821822216112380224748238682451924099
24058
242642155824198
2141620616205792039720314 20224 2001218826192231942119742
2135421169207282105920944190712087321275 1980719614DE FOREST RD
FO REST HILL D R
CRIBBS DR LAKEVIEW DRSTRATFORD LNLAKE PARK DR CASTLE CREEK DRINGLENOOK CTCAMBRIDGE MANOR LNCH ES HIR E DRRAINTREE CIR DEFOREST CTGLEN LAKES DR
E PENINSULA DR
BENT TREE CTPRESTWICK CTW PENINSULADR
K I N G S C A N Y O N C T
V
I
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L
AGE
GR
E
E
N DR
NORTHSHORECTMAC ARTHUR BLVDLAKE VISTA DRSAM R A Y B U R N TO LLW A Y
Ho r izo n Heal th Co rpo rati on
O l dDen t o nCreek
Old
DentonCreekDentonCreek450
440
460470440
440
4 5 0
440450450450
4 6 0
450
450
460
460 460460 470450450
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4 3 8
452
452
4 5 4
Study
Non-Study
DCLID-1*
Cross Section
Index Contour**
Intermediate Contour**
Major Road
Local Road
Political Boundary
100 Year Revised Existing (FullyDeveloped) Conditions
Effective FEMA 100 Year
**Contours generated from 2009 TNRIS LiDAR and 2016 Halff Survey Data.ExhibitDenton Creek
´
Denton Creek Drainage StudyProject
Hydraulic Work MapTitle
Watershed
0 200 400
Scale in Feet
1 inch = 400 feet
Exhibit 6Panel 4 of 5Aerial Imagery from 2015 Woolpert*Denton County Levee Improvement District No. 1
KEY TO FEATURES
179911811417892182231833518479
1364613307139421413713768185921442517649186461297014819147061497315050
1 5 2 3 8 17410126541255115359
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1 7 1 9 7
16956190711 6 5 0 1
1 6 7 0 2
1 6 2 9 41980719614
120461182113144
DE FOREST RD LAKE VISTA DRA
LLE
N R
D
LAKEVIEW DR
CASTLE CREEK DR
WOODLAKE DR
ASHFORD DR
A
N
D
O
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CH ES HIR E DR
WARREN CT
BEAU DRST JAMESCH ALF ON T P L DEFOREST CTPARKERDRN
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DOVER CTVi st a R id ge Ath l et i c Co m p lex
Dallas Gun Club
Dallas Gun Club
Ho r izo n Health Co rpo ration
Old
DentonCreek
D e ntonCreek Tim berCre ek
44045 0
460
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440
450
4
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Study
Non-Study
DCLID-1*
Cross Section
Index Contour**
Intermediate Contour**
Major Road
Local Road
Political Boundary
100 Year Revised Existing (FullyDeveloped) Conditions
Effective FEMA 100 Year
**Contours generated from 2009 TNRIS LiDAR and 2016 Halff Survey Data.ExhibitDenton Creek
´
Denton Creek Drainage StudyProject
Hydraulic Work MapTitle
Watershed
0 200 400
Scale in Feet
1 inch = 400 feet
Exhibit 6Panel 5 of 5Aerial Imagery from 2015 Woolpert*Denton County Levee Improvement District No. 1
KEY TO FEATURES
Denton Creek
CottonwoodBranch
Coppell
Dallas
Irving
CarrolltonLewisville
Panel 01 of 05
FREEPORT PKWYDENTON TAP RDMAC ARTHUR BLVDBELT LINE RD
Panel 02 of 05
Panel 03 of 05
Panel 04 of 05
Panel 05 of 05
Denton County
Dallas County
SANDY LAKE RD SAM RAYBURN TOLLWAYST. Anne Catholic Parish
DallasGun Club
Coppell City Hall
Coppell MiddleSchool North Denton CreekElementary School
Vista Ridge Athletic Complex
Lakeside Elementary School
*Denton County Levee Improvement District No. 1
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?m
ExhibitDenton CreekExhibit 7Index MapDenton Creek Drainage StudyProject
Revised Existing 2-Year Velocity Distribution Map
Title
Watershed
0 1,000 2,000
Scale in Feet
1 inch = 2,000 feet ´
Aerial Imagery from 2015 Woolpert
KEY TO FEATURES
Study Stream
Non-Study Stream
DCLID-1* Levee
Major Road
Local Road
Panel Extent
County Boundary
Political Boundary
Revised Existing 2-Year Velocity (ft/s)
5.5 - 6.0
6.0 +
0.0 - 1.0
1.0 - 2.0
2.0 - 3.0
3.0 - 3.5
3.5- 4.0
4.0 - 4.5
4.5 - 5.0
5.0 - 5.5
A C E R D
CANYON DR
GIFFORD DRMADISON STLAYTON DR
COPPERSTONE TRL
AVALON LN
GRAYWOOD LN PEDMORE DRWESTMINSTER WAY
LOXLEY DR
AUBURN WAYWESTMINSTER CTFAIRLANDS CIRCANEMOUNT LNCOMPTON CTCLIFTON CT
MARTEL CTB L A C K F I E L D D R
GIFFORD CT
SH EF FIE LD C THAMPT
ON DRCROMWELL CTJOSHUA LN
BUTTONWOOD DRBANKERS COTTAGE LNHARDWICK CT
GRAYWOOD CTPA RKW A YSAM RAYBURN TOLLWAY
37000
36500
36000
35500
35000 3450034000
3350033000
32500
32000
DentonCreek
?m
ExhibitDenton Creek
´
Denton Creek Drainage StudyProject
Revised Existing 2-YearVelocity Distribution Map
Title
Watershed
0 200 400
Scale in Feet
1 inch = 400 feet
Exhibit 7Panel 1 of 5Aerial Imagery from 2015 Woolpert
KEY TO FEATURES
Study Stream
Non-Study Stream
River Station1000
Major Road
Local Road
Revised Existing 2-Year Velocity (ft/s)
5.5 - 6.0
6.0 +
0.0 - 1.0
1.0 - 2.0
2.0 - 3.0
3.0 - 3.5
3.5- 4.0
4.0 - 4.5
4.5 - 5.0
5.0 - 5.5
DENTON TAPNATCHES TRCE
LY N D S IE D R
MARTEL LN
COWBOY DRMADISON STLEVEE PLWAVE
R
L
Y
L
NPLAZA BLVDCOPPERSTONE TRL
AVALON LN
C H E S T N U TLNAUBURN WAYM I L A N S T
N HEARTZ RDS
P
R
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G
H
IL
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ENCLAVES CTKAILEY WAYCANEMOUNT LNCROSS TIM BERS TRL
P
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MARTEL CTBRUSHY CREEK TRLS
TONEMEADE WAYC
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D
T
R
E
E C
T
FLIN TSH IR E W A YBANKERS COTTAGE LNRU STIC M EA D O W W AYPARKWAY
NATCHES TRCE
SAM RAYBURN TOLLWAY
Cop p ell Mi dd l e School North Denton Creek Elementary School
Andrew Brown Park
31500 3100030500
30000
29500 290002850028 0 0 0
2 7 5 0 0
2 7 0 0 0
2 6 5 0 032000DentonCreek
CottonwoodBranchatDentonExhibitDenton Creek
´
Denton Creek Drainage StudyProject
Revised Existing 2-YearVelocity Distribution Map
Title
Watershed
0 200 400
Scale in Feet
1 inch = 400 feet
Exhibit 7Panel 2 of 5Aerial Imagery from 2015 Woolpert
KEY TO FEATURES
Study Stream
Non-Study Stream
River Station1000
Major Road
Local Road
Revised Existing 2-Year Velocity (ft/s)
5.5 - 6.0
6.0 +
0.0 - 1.0
1.0 - 2.0
2.0 - 3.0
3.0 - 3.5
3.5- 4.0
4.0 - 4.5
4.5 - 5.0
5.0 - 5.5
MOORELODGE RDSAMUEL BLVDPHI
LL
I
PS DRW ATERVIEW DRHOOD D RLYNDSIE D R
PA R KV IE W P L
ALEX DR
DUNCAN DR
CRIBBS DR
KYLE DR PARKWOOD
L
NROCKCREST DRLAKE PARK DR
MEADOWOOD LN
JOHNSON DR
HARWELL STPLUMLEE PL
THOM PSON DR
STI
LL
FOREST DRWILLINGHAM PLHARRISON DR
COATS ST
GLEN LAKES DR
MICHELLE PL
C
R
E
S
T
WOOD DR
CLAYTON CIRBENT TREE CTPRESTWICK CTS
P
R
I
N
G
H
IL
L
D
R
CLEAR HAVEN DRENCLAVES CTKAILEY WAYC
R
E
S
T
HAVE
N
R
DP A R K L N
P
A
R
K
H
I
G
H
L
A
N
D
S
D
R WI
L
L
OW RI
DGE
CT
BRANT DRMORNING MISTNORTHSHORECT
HOOD CT
QUIET VALLEY DRPARKWAYSAM RAYBURN TOLLWAY2 6 0 0 0 25500250002450024000235002 7 0 0 0
2 6 5 0 0
O l dDen t o nCreek
Andrew Brown Park DentonCreekExhibitDenton Creek
´
Denton Creek Drainage StudyProject
Revised Existing 2-YearVelocity Distribution Map
Title
Watershed
0 200 400
Scale in Feet
1 inch = 400 feet
Exhibit 7Panel 3 of 5*Denton County Levee Improvement District No. 1Aerial Imagery from 2015 Woolpert
KEY TO FEATURES
DCLID-1* LeveeRiver Station1000
Study Stream
Non-Study Stream
Major Road
Local Road
Revised Existing 2-Year Velocity (ft/s)
5.5 - 6.0
6.0 +
0.0 - 1.0
1.0 - 2.0
2.0 - 3.0
3.0 - 3.5
3.5- 4.0
4.0 - 4.5
4.5 - 5.0
5.0 - 5.5
DE FOREST RD
FO REST HILL D R
CRIBBS DR LAKEVIEW DRSTRATFORD LNLAKE PARK DR CASTLE CREEK DRINGLENOOK CTCAMBRIDGE MANOR LNCH ES HIR E DRRAINTREE CIR DEFOREST CTGLEN LAKES DR
E PENINSULA DR
BENT TREE CTPRESTWICK CTW PENINSULADR
K I N G S C A N Y O N C T
V
I
L
L
AGE
GR
E
E
N DR
NORTHSHORECTMAC ARTHUR BLVDLAKE VISTA DRSAM R A Y B U R N TO LLW A Y
Ho r izo n Heal th Co rpo rati on
230002 2 5 0 0
22000 2 1 5 0 0 2 1 0 0 0 2 0 5 0 0 20000
19500
19000
235002450024000O l dDen t o nCreek
Old
DentonCreekDentonCreek
ExhibitDenton Creek
´
Denton Creek Drainage StudyProject
Revised Existing 2-YearVelocity Distribution Map
Title
Watershed
0 200 400
Scale in Feet
1 inch = 400 feet
Exhibit 7Panel 4 of 5*Denton County Levee Improvement District No. 1Aerial Imagery from 2015 Woolpert
KEY TO FEATURES
DCLID-1* LeveeRiver Station1000
Study Stream
Non-Study Stream
Major Road
Local Road
Revised Existing 2-Year Velocity (ft/s)
5.5 - 6.0
6.0 +
0.0 - 1.0
1.0 - 2.0
2.0 - 3.0
3.0 - 3.5
3.5- 4.0
4.0 - 4.5
4.5 - 5.0
5.0 - 5.5
DE FOREST RD LAKE VISTA DRA
LLE
N R
D
LAKEVIEW DR
CASTLE CREEK DR
WOODLAKE DR
ASHFORD DR
A
N
D
O
V
E
R L
N
CH ES HIR E DR
WARREN CT
BEAU DRST JAMESCH ALF ON T P L DEFOREST CTPARKERDRN
O
T
TIN
G
H
A
M
D
R
DOVER CTVi st a R id ge Ath l et i c Co m p lex
Dallas Gun Club
Dallas Gun Club
Ho r izo n Health Co rpo ration
18500
18000
1750
0
170001650016000
1 5 5 0 0
15000
14500
14000
Old
DentonCreek
D e ntonCreek Tim berCre ek
BRENTWOOD DR
ExhibitDenton Creek
´
Denton Creek Drainage StudyProject
Revised Existing 2-YearVelocity Distribution Map
Title
Watershed
0 200 400
Scale in Feet
1 inch = 400 feet
Exhibit 7Panel 5 of 5*Denton County Levee Improvement District No. 1Aerial Imagery from 2015 Woolpert
KEY TO FEATURES
DCLID-1* LeveeRiver Station1000
Study Stream
Non-Study Stream
Major Road
Local Road
Revised Existing 2-Year Velocity (ft/s)
5.5 - 6.0
6.0 +
0.0 - 1.0
1.0 - 2.0
2.0 - 3.0
3.0 - 3.5
3.5- 4.0
4.0 - 4.5
4.5 - 5.0
5.0 - 5.5
Denton Creek
Coppell
Carrollton
Lewisville
Panel 01 of 03
DENTON TAP RDPanel 02 of 03
Denton County
Dallas County
SANDY LAKE RD
Panel 03 of 03
MAC ARTHUR BLVD%&c(
CottonwoodBranch SAM RAYBURN TOLLWAYST. Anne Catholic Parish
DallasGun Club
DallasGun Club
Coppell City Hall
Coppell MiddleSchool North
Denton CreekElementary School
Vista Ridge Athletic Complex
Lakeside Elementary School
*Denton County Levee Improvement District No. 1
KEY TO FEATURES
ExhibitDenton CreekExhibit 8Index MapDenton Creek Drainage StudyProject
Dredging Limits MapTitle
Watershed
Study Stream
Non-Study Stream
DCLID-1* Levee
Major Road
Local Road
Dredging Limit
Panel Extent
County Boundary
Political Boundary
0 600 1,200
Scale in Feet
1 inch = 1,200 feet ´
Aerial Imagery from 2015 Woolpert
30000
29500 290002850028 0 0 0
2 7 5 0 0
2 7 0 0 0
2 6 5 0 0
2 6 0 0 0 25500250002 7 0 0 0
2 6 5 0 0
DENTON TAPLODGE RDNATCHES TRCE
W ATERVIEW DRLY N D S IE D R
PA R KV IE W P L
ALEX DRLEVEE PLKYLE DRPLAZA BLVDROCKCREST DRMEADOWOOD LN
C H E S T N U T L N
WILLINGHAM PLM I L A N S T
N HEARTZ RDC
R
E
S
T
WOOD DR
S
P
R
I
N
G
H
IL
L
D
R
ENCLAVES CTKAILEY WAYCROSS TIM BERS TRL
C
R
E
S
T
HAVE
N
R
DP
A
R
K
H
I
G
H
L
A
N
D
S
D
R WI
L
L
OW RI
DGE
CT
BRUSHY CREEK TRLS
TONEMEADE WAYC
R
O
O
K
E
D
T
R
E
E C
TFLORENCE WAYFLIN TSH IR E W A Y
BRANT DRMORNINGMISTRU STIC M EA D O W W AYQUIET VALLEY DRPARKWAY
NATCHES TRCE
PARKWAYSAM R A YB U R N TO LLW A YCop p ell Mi dd l e School North Denton Creek Elementary School
Andrew Brown Park
Denton Creek
C o tto n w o o d B ra n c h Flo o d C o n tro l C h a n n e lO l d D e n tonCree k C hannelExisting Gabion Weir
Repair Slope Failure
Existing Gabion Weir CoppellLewisville4 5 0
4 6 0
4 4 0
4 7 0480
490
4
7
0
460
470
4 6 0
4604504504704704
5
0
450460450
4 7 0
4704
6
0
440
460450480
450470470
4404 6 0
4 7 0 4 7 0
460
460
450460460460460 4504 5 0
4 5 0 47046045 04504504604 6 0
460
440460460 460470450470
454
4 5 2 448444
4 4 6
442
4 5 6 4584 6 2
4644 6 6468
438436
472
474
4 7 6478482
484
486
434488
4 5 8
452458454
462456
466
4
5
4
438 454438
468
4 6 4
4624624664644624564 4 6
4
6
2
4 3 8
4544524
6
6
464466458
4 5 8 456
452
456468
456
466468 472472452
462 448464468
4 4 8
4 5 8
456
4
5
6
4624564684624644 6 2
4 4 8 468466436468444462
448466 472462
462456452
4
6
8
46 4
4
6
8
4
5
4
4 5 8466
4664624 6 4
448
452 442468464
458454
452452
4 6 8
45 6
462
466
4 6 2
45846 4
456
464
466464466
466474
466468464458458
4
6
6 4724 5 2
466446438
4
6
6
4664
6
4 4484 7 2
4 6 4
46 2
4544 3 8 438464
468472452 464466 452462 466434
4
7
2
44 8
4 6 8
4644624644 5 6
448454452
458454
488
4644624 6 4
4544644 5 4
466 4624 6 2456 454458
466
4544544 5 4
466448
464 446454
4
7
2
466454462
4 6 6
4644544
5
2 466462 47245845
4
4 5 8
464466458
4 6 2
4 5 2
468
466472
4 4 2
4 6 2
4624 5 6
4664584584 6 4 474468
464456 464466
4524 6 6
466
464
4 6 4
4564584624 3 8
454**Contours generated from 2009 TNRIS LiDAR and 2016 Halff Survey Data.
KEY TO FEATURES
ExhibitDenton Creek
´
Denton Creek Drainage StudyProject
Dredging MapTitle
Watershed
0 200 400
Scale in Feet
1 inch = 400 feet
Exhibit 8Panel 1 of 3Aerial Imagery from 2015 Woolpert*Denton County Levee Improvement District No. 1
River Station1000
Dredging Limit
Study Stream
Non-Study Stream
DCLID-1* Levee
Index Contour**Intermediate Contour**Major Road
Local Road
Political BoundaryExisting Gabion Weir
255002500024000230002 2 5 0 0
22000 2 1 5 0 0 2 1 0 0 0 2 0 5 0 0 20000
235002450024000DE FOREST RD
W ATERVIEW DRFO REST HILL D R
STRATFORD LNROCKCREST DRLAKE PARK DR CASTLE CREEK DRINGLENOOK CTBE
L
L
A VI
S
T
A DR
CAMBRIDGE MANOR LNCH ES HIR E DRRAINTREE CIR
GLEN LAKES DR
E PENINSULA DR
C
R
E
S
T
WOOD DR BE
NT
T
RE
E
C
T
PRESTWICK CTC
R
E
S
T
HAVE
N
R
DW PENINSULA DR
K I N G S C A N Y O N C T
N O R T H S H O R E C TMAC ARTHUR BLVDLAKE VISTA DRHIGHLAND DRS A M R A Y B U R N T O L L W A Y
Ho r izo n Heal th Co rpo rati on
O l dDen t o nCreekCh
a
n
n
elFloodControlChannelExisting Gabion Weir
ProposedChannel Armoring
LewisvilleCoppell
440 450
4604704 6 0440 4 4 0
460450
4
6
0
470440
450
460
4 5 0
4 6 0
450
450
4 5 0
450450
4504 5 0
450
450460450450450460438 442 444 446
448
452454
456458
4624644 6 6
468 472
4
7
4
446
454452452
4 5 2
456442
4 6 6
4 3 8
458 446452
4 5 2454
464452
452454456458
4
5
6452
472458
4484
5
8
4584544 4 8
438
4 6 4
452454456
4 4 4
454
462
454448
4 6 2
448
456458458
4524584 6 4
442442
4524544 5 2
454456446452
4 4 8
456
4
4
4 456454
4544 5 6
454446448
4524
3
8
4 5 8 456448454
448
438
4524624524 5 8 456452444
458446454
448456454452
442
4 5 8
456448438
45
2
4484584 4 8
456
4 3 8
4 4 8
4
5
8 454444
462458452452452
456456442
4 7 2 472454462456
458 4564524484564544524424524564544564544 5 2452
458
448
4544564564 5 8
444
452
454
4 5 8
458452458
4 4 8
452
4524 4 8
458
452
446456**Contours generated from 2009 TNRIS LiDAR and 2016 Halff Survey Data.
KEY TO FEATURES
ExhibitDenton Creek
´
Denton Creek Drainage StudyProject
Dredging MapTitle
Watershed
0 200 400
Scale in Feet
1 inch = 400 feet
Exhibit 8Panel 2 of 3Aerial Imagery from 2015 Woolpert*Denton County Levee Improvement District No. 1
River Station1000
Dredging Limit
Study Stream
Non-Study Stream
DCLID-1* Levee
Index Contour**Intermediate Contour**Major Road
Local Road
Political BoundaryExisting Gabion Weir
2 0 5 0 0 20000
19000
18500
18000
1750
0
170001650016000
1 5 5 0 0
15000
14500
DE FOREST RD LAKE VISTA DRA
LLE
N R
D
LAKEVIEW DRSTRATFORD LNCASTLE CREEK DRLAKE FOREST DRWOODLAKE DR
A
N
D
O
V
E
R
L
NCAMBRIDGE MANOR LNCH ES HIR E DR
BEAU DRST JAMESCH ALF ON T P L DEFOREST CTPARKERDRN
O
T
TIN
G
H
A
M
D
R
K I N G S C A N Y O N C T
DOVER CTVi st a R id ge Ath l et i c Co m p lex
Dallas Gun Club
Dallas Gun Club
Ho r izo n Health Co rpo ration
Old
DentonCreekChannel
DentonCreekFloodControl Channel
TimberCreek
19500
C a rro llto n
C o p p e llLewisville
Carrollton
LewisvilleCoppell
LewisvilleCarrollton440
45 0
460
430470440
440
470440
450
450
440
450
450
450450
450
440450
460
4 3 0
440
450450440450
450
4 5 0
450450
450
4 5 0
448446
444
442438
452454
456
436
4344324584624644
6
6468472
4
7
4
446438
452
448446
47245645 2
4 4 8
444448452
45 6444446
442442
45
2
438446
442442
4 4 4
444
4 5 8
444444
4 5 4446 444444448 446454442
448
456
44 6
452454458454448
442452
452
444446452452 438
442
44
2
436
452
4 5 6
4 3 8 4584
54
446442
432 44444
4
444458
444442
444 444454
436446
4 5 4
448
438
442
4464464 4 8
442456446456 442448444
4564 5 2
454444
456452
4
4
8438444
438436
448
452
436
454446438 4464 4 6454 4464
5
6 4544 5 6
4
4
2448448442442
452
4484544464
5
6
454
45
6436444438454 448446446 444452454
4424
4
2
44 8
448462 458
4 5 8
448452 4424484424 4 8
4
5
4 448454
4
5
6
4384464484
5
4
454
448
4424 4 2
456
446452
454
456
456 438456456448 438
4 5 6
442456444446 444448444
454 4444
4
6
456 444442
4 4 6
4564424524 4 8 436442
472
**Contours generated from 2009 TNRIS LiDAR and 2016 Halff Survey Data.
KEY TO FEATURES
ExhibitDenton Creek
´
Denton Creek Drainage StudyProject
Dredging MapTitle
Watershed
0 200 400
Scale in Feet
1 inch = 400 feet
Exhibit 8Panel 3 of 3Aerial Imagery from 2015 Woolpert*Denton County Levee Improvement District No. 1
River Station1000
Dredging Limit
Study Stream
Non-Study Stream
DCLID-1* Levee
Index Contour**Intermediate Contour**Major Road
Local Road
Political BoundaryExisting Gabion Weir
2 1 0 0 0 2 0 5 0 0 20000
19000
18500
18000
1750
0
170001650016000
1 5 5 0 0
15000
DE FOREST RD LAKE VISTA DRA
LLE
N R
D
LAKEVIEW DRSTRATFORD LNCASTLE CREEK DRLAKE FOREST DRINGLENOOK CTA
N
D
O
V
E
R
L
NCAMBRIDGE MANOR LNCH ES HIR E DR
BEAU DRST JAMESRAINTREE CIR
CH ALF ON T P L DEFOREST CTPRESTWICK CTN
O
T
TIN
G
H
A
M
D
R
RAINTREE DRK I N G S C A N Y O N C T
DOVER CTN O R T H S H O R E C T
Vi st a R id ge Ath l et i c Co m p lex
Ho r izo n Health Co rpo ration
Old
DentonCreekChannel
DentonCreekLewisville
Coppell LewisvilleCarrolltonCoppell
Carrollton
F l o o d C o n t r o l C h a n n e l 19000
2 1 5 0 0
Dallas Gun Club
ExhibitDenton Creek
´
Denton Creek Drainage StudyProject
Alternative 1Sediment Trap
Title
Watershed
0 200 400
Scale in Feet
1 inch = 400 feet
Exhibit 9Aerial Imagery from 2015 Woolpert*Denton County Levee Improvement District No. 1
KEY TO FEATURES
Local Road
Proposed Sediment Trap
Political Boundary
Study Stream
Non-Study Stream
Major Road
DCLID-1* LeveeRiver Station1000
Proposed 2-Year Velocity (ft/s)
5.5 - 6.0
6.0 +
0.0 - 1.0
1.0 - 2.0
2.0 - 3.0
3.0 - 3.5
3.5- 4.0
4.0 - 4.5
4.5 - 5.0
5.0 - 5.5
Denton Creek
Coppell
Carrollton
Lewisville
Panel 01 of 03
DENTON TAP RDPanel 02 of 03
Denton County
Dallas County
SANDY LAKE RD
Panel 03 of 03
MAC ARTHUR BLVDBerm 1
Berm 2
Berm 3 Berm 4 Berm 5 Berm 6
CottonwoodBranch
%&c(SAM RAYBURN TOLLWAYST. Anne Catholic Parish
DallasGun Club
DallasGun Club
Coppell City Hall
Coppell MiddleSchool North
Denton CreekElementary School
Andrew Brown Park
Vista Ridge Athletic Complex
Lakeside Elementary School
*Denton County Levee Improvement District No. 1
KEY TO FEATURES
ExhibitDenton CreekExhibit 10Index MapDenton Creek Drainage StudyProject
Alternative 2Old Denton Creek Diversion
Title
Watershed
Study Stream
Non-Study Stream
DCLID-1* Levee
Proposed Berm Location
Major Road
Local Road
Panel Extent
County Boundary
Political Boundary
0 600 1,200
Scale in Feet
1 inch = 1,200 feet ´
Aerial Imagery from 2015 Woolpert
Proposed 2-Year Velocity (ft/s)
5.5 - 6.0
6.0 +
0.0 - 1.0
1.0 - 2.0
2.0 - 3.0
3.0 - 3.5
3.5- 4.0
4.0 - 4.5
4.5 - 5.0
5.0 - 5.5
30000
29500 290002850028 0 0 0
2 7 5 0 0
2 7 0 0 0
2 6 5 0 0
2 6 0 0 0 25500250002 7 0 0 0
2 6 5 0 0
DENTON TAPLODGE RDNATCHES TRCE
W ATERVIEW DRLY N D S IE D R
PA R KV IE W P L
ALEX DRLEVEE PLKYLE DRPLAZA BLVDROCKCREST DRMEADOWOOD LN
C H E S T N U T L N
WILLINGHAM PLM I L A N S T
N HEARTZ RDC
R
E
S
T
WOOD DR
S
P
R
I
N
G
H
IL
L
D
R
ENCLAVES CTKAILEY WAYCROSS TIM BERS TRL
C
R
E
S
T
HAVE
N
R
DP
A
R
K
H
I
G
H
L
A
N
D
S
D
R WI
L
L
OW RI
DGE
CT
BRUSHY CREEK TRLS
TONEMEADE WAYC
R
O
O
K
E
D
T
R
E
E C
TFLORENCE WAYFLIN TSH IR E W A Y
BRANT DRMORNINGMISTRU STIC M EA D O W W AYQUIET VALLEY DRPARKWAY
NATCHES TRCE
PARKWAYSAM R A YB U R N TO LLW A YCop p ell Mi dd l e School North Denton Creek Elementary School
Andrew Brown Park
Denton Creek
C o tto n w o o d B ra n c h Flo o d C o n tro l C h a n n e lO l d D e n tonCree k C hannelExisting Gabion Weir
Repair Slope Failure
Existing Gabion Weir CoppellLewisvilleBerm 2
Berm 1
KEY TO FEATURES
ExhibitDenton Creek
´
Denton Creek Drainage StudyProject
Title
Watershed
0 200 400
Scale in Feet
1 inch = 400 feet
Exhibit 10Panel 1 of 3Aerial Imagery from 2015 Woolpert*Denton County Levee Improvement District No. 1
Alternative 2Old Denton Creek Diversion
Study Stream
Proposed Berm Location
19500
River Station1000
Major Road
Local Road
Political BoundaryExisting Gabion Weir
DCLID-1* Levee
Non-Study Stream
Proposed 2-Year Velocity (ft/s)
5.5 - 6.0
6.0 +
0.0 - 1.0
1.0 - 2.0
2.0 - 3.0
3.0 - 3.5
3.5- 4.0
4.0 - 4.5
4.5 - 5.0
5.0 - 5.5
255002500024000230002 2 5 0 0
22000 2 1 5 0 0 2 1 0 0 0 2 0 5 0 0 20000
235002450024000DE FOREST RD
W ATERVIEW DRFO REST HILL D R
STRATFORD LNROCKCREST DRLAKE PARK DR CASTLE CREEK DRINGLENOOK CTBE
L
L
A VI
S
T
A DR
CAMBRIDGE MANOR LNCH ES HIR E DRRAINTREE CIR
GLEN LAKES DR
E PENINSULA DR
C
R
E
S
T
WOOD DR BE
NT
T
RE
E
C
T
PRESTWICK CTC
R
E
S
T
HAVE
N
R
DW PENINSULA DR
K I N G S C A N Y O N C T
N O R T H S H O R E C TMAC ARTHUR BLVDLAKE VISTA DRHIGHLAND DRS A M R A Y B U R N T O L L W A Y
Ho r izo n Heal th Co rpo rati on
O l dDen t o nCreekCh
a
n
n
elFloodControlChannelExisting Gabion Weir
ProposedChannel Armoring
Berm 3
?m
Berm 4
Berm 5
Berm 2
LewisvilleCoppell
KEY TO FEATURES
ExhibitDenton Creek
´
Denton Creek Drainage StudyProject
Title
Watershed
0 200 400
Scale in Feet
1 inch = 400 feet
Exhibit 10Panel 2 of 3Aerial Imagery from 2015 Woolpert*Denton County Levee Improvement District No. 1
Alternative 2Old Denton Creek Diversion
Study Stream
Proposed Berm Location
19500
River Station1000
Major Road
Local Road
Political BoundaryExisting Gabion Weir
DCLID-1* Levee
Non-Study Stream
Proposed 2-Year Velocity (ft/s)
5.5 - 6.0
6.0 +
0.0 - 1.0
1.0 - 2.0
2.0 - 3.0
3.0 - 3.5
3.5- 4.0
4.0 - 4.5
4.5 - 5.0
5.0 - 5.5
2 0 5 0 0 20000
19000
18500
18000
1750
0
170001650016000
1 5 5 0 0
15000
14500
DE FOREST RD LAKE VISTA DRA
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LAKEVIEW DRSTRATFORD LNCASTLE CREEK DRLAKE FOREST DRWOODLAKE DR
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NCAMBRIDGE MANOR LNCH ES HIR E DR
BEAU DRST JAMESCH ALF ON T P L DEFOREST CTPARKERDRN
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D
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K I N G S C A N Y O N C T
DOVER CTVi st a R id ge Ath l et i c Co m p lex
Dallas Gun Club
Dallas Gun Club
Ho r izo n Health Co rpo ration
Old
DentonCreekChannel
DentonCreekFloodControl Channel
TimberCreek
Berm 5
Berm 6
C a rro llto n
C o p p e llLewisville
Carrollton
LewisvilleCoppell
LewisvilleCarrolltonKEY TO FEATURES
ExhibitDenton Creek
´
Denton Creek Drainage StudyProject
Title
Watershed
0 200 400
Scale in Feet
1 inch = 400 feet
Exhibit 10Panel 3 of 3Aerial Imagery from 2015 Woolpert*Denton County Levee Improvement District No. 1
Alternative 2Old Denton Creek Diversion
Study Stream
Proposed Berm Location
19500
River Station1000
Major Road
Local Road
Political BoundaryExisting Gabion Weir
DCLID-1* Levee
Non-Study Stream
Proposed 2-Year Velocity (ft/s)
5.5 - 6.0
6.0 +
0.0 - 1.0
1.0 - 2.0
2.0 - 3.0
3.0 - 3.5
3.5- 4.0
4.0 - 4.5
4.5 - 5.0
5.0 - 5.5
APPENDIX B: FLUVIAL-GEOMORPHIC ASSESSMENT OF THE DE NTON COUNTY LEVEE (DCLID
NO. 1) SEGEMENT OF DENTON CREEK
Fluvial-Geomorphic Assessment
of the Denton County Levee
(DCLID No. 1) Segment of
Denton Creek
Report for Halff Associates, Inc. October 2017
Peter M. Allen, PhD, PG
John Dunbar PhD, PG
2
Fluvial-Geomorphic Assessment of the
Denton County Levee (DCLID No. 1)
Segment of Denton Creek
3
SECTION 1-INTRODUCTION
1.1 STUDY LOCATION
1.2 STUDY OBJECTIVES
1.3 STABILITY CONCEPTS
1.4 STUDY APPLICATIONS
1.5 STUDY SOURCES
1.6 LIMITATIONS AND ASSUMPTIONS
SECTION 2-STUDY AREA DESCRIPTION
2.1 GEOLOGY
2.2 SOILS
2.3 CLIMATE
SECTION 3-HYDROLOGIC DATA
3.1 FLOW DURATION ANALYSIS
3.2 FLOOD FREQUENCY
SECTION 4-FIELD DATA
4.1 FIELD DATA COLLECTION: SCOUR
4.2 GRAIN SIZE AND SAND MOVEMENT
4
4.3 CHANNEL ERODIBILITY AND FIELD EXAMPLES
4.3.1 Jet Testing and Channel Erodibility
4.3.2 Channel Erosion Sequence: Field
4.3.3 Spillway Erosion
4.4 GEOMORPHIC EVALUATION REACHES
SECTION 5-HISTORICAL CHANNEL CHANGE
5.1 UPSTREAM SUPPLY REACH
SECTION 6-CHANNEL STABILITY AND CAPACITY ANALYSIS
6.1 EMPIRICAL METHODS
6.1.1 Soar and Thorne (2002)
6.1.2 Parker Regressions
6.1.3 USACE Charts
6.2 SAM
6.3 EQUILIBRIUM SLOPE
6.4 CAPACITY SUPPLY ANALYSIS
6.5 PLANFORM ANALYSIS
SECTION 7-CONCLUSIONS
5
Fluvial-Geomorphic Assessment
of the Denton County Levee
(DCLID No. 1) Segment of
Denton Creek
SECTION 1 -INTRODUCTION
This report identifies and evaluates fluvial geomorphic processes in the
project area which can affect long term design and stability calculations
for the Levee District (DCLID No. 1.).
1.1 STUDY LOCATION
The study portion of Denton Creek extends from Grapevine Dam
downstream through the DCLID No.1. Denton Creek has a drainage area
at the dam of 695 square miles. Grapevine Dam, impounded in 1952,
has a conservation pool elevation of 535 feet, and an emergency
spillway crest of 560 feet. The dam exerts significant control on the
6
flow into the levee district. A USGS flow gage, 08055000 is located just
upstream of the Levee District and about 4.1 miles downstream of
Grapevine Dam Figure 2. The contributing drainage area at the gage is
705 square miles. The period of record is 1947 to 1991 and 2003 to the
current year, Figure 1.
Figure 1 Period of record flow for USGS 08055000.
Denton Creek was surveyed visually from below Grapevine Dam
through the Levee District to River station 42000.
7
Figure 2. Illustrates the general area of study.
Figure 3 Land Use Changes in Denton Creek Basin (NCTCOG, 2011)
In order to assess the impact of the hydrology on the flow into the
Levee District, land use change needs to be addressed. The above map
8
illustrates the changes in urbanization upstream of Grapevine Dam
Figure 3. Similarly, urbanization below the dam and above the Levee
District must be taken into account. These changes are shown in time
series photographs below (Figures 4-6). The photographs show the
large increase in predominantly commercial/warehouse and residential
land uses filling in the vacant land below the dam and above the Levee
District.
Figure 4. Photograph of Study Area 2001
9
Figure 5. Photograph of Study Area 2007
Figure 6. Photograph of Study Area 2016
10
1.2 STUDY OBJECTIVES
Rivers are dynamic with major drivers being discharge and sediment.
Adjustments to these inputs are vertical changes (river slope/ or cutting
and or filling the channel) and lateral changes (planform-sinuosity
changes or changes in width and/or meander pattern). The changes are
modulated through the river’s physical and biological (riparian
vegetation) attributes. Rivers can be classified on a simple basis as
either “Alluvial” or, “Threshold” channels. Alluvial channels are able to
adjust rapidly both vertically and horizontally to changes in discharge
and sediment inputs. Threshold channels (bedrock controlled) are
typically slower to respond to changes in inputs. Biological controls of
riparian vegetation can exert large control on lateral changes in alluvial
rivers such as Denton Creek.
There are many methods to assess the potential impacts of changes of
flow and sediment input on rivers, but they essentially fall into three
categories, Figure 7.
Figure 7. Methods of River Stability Analysis (Stroth, 2017)
11
The most common methods are the analog and empirical methods. The
analog method places reliance on emulation of a reference reach to
formulate a design. While there are studies of river effects below main
stem dams, there are no suitable stable analog areas to compare with
the study area, so this method was not considered other than through
literature review of effects of mainstem dams on rivers. The empirical
approach is limited to the data sets upon which the equations were
derived. These methods were used in this study to establish upper and
lower boundary conditions for comparison of model outputs.
The alternative approach, used here is the analytical approach or
process based approach. One application of this approach is the SAM
method created by Copeland et al., (1994) and described by Thomas, et
al. (2002) and incorporated in the HEC models (hydrology and hydraulic
models of the USACE). SAM is an integrated system of programs
developed through the Flood Reduction and Stream Restoration
Research Program to aid engineers in analysis associated with
designing, operating, and maintaining flood control channels and
stream restoration projects. This method relies on calculating the
sediment balance using a single dominant discharge and sediment size
gradation to assess channel dimensions and equilibrium slope. The
problems with this method, since it just uses one flow or the “dominant
discharge”, is that the methodology can result in unstable channel
designs since other influential flows can affect sediment transport.
Stroth (2017) improved this approach, based on work by Soar and
Thorne (2001), where he balances the total sediment delivered from
and upstream “Supply Reach” through a “Design Reach” across the
entire flow duration curve rather than one single discharge. In addition,
12
the method incorporates overbank flow into the analysis. Therefore,
Stroth’s method was used in this study.
The objectives in this study are:
1. Analyze the current condition of the DCLID No. 1 channel through
visual survey of channel conditions.
2. Assess what a stable channel configuration would be for the channel
in DCLID No 1. based on conducting a stability analysis using
empirical and analytical methods including Capacity Supply Analysis
(CSA) of the study area to include:
a. Assess sediment contribution and source of sediment in
supply reach.
b. Physically measure erodibilty of banks in DCLID No.1
through submerged jet testing.
c. Measure the grain size in the supply reach and Levee
District and assess incipient motion of bed material
d. Assess the impact of future urbanization on the CSA.
3. Coordinate findings with Halff Associates, Inc. in terms of potential
solutions to sedimentation problems within the DCLID No. 1, given
the flood flow requirements.
1.3 STABILITY CONCEPTS
The concept of stability needs to be defined in terms of the time frame
involved. In the case of natural rivers, stability must include allowances
for the river’s tendency to erode its banks, meander, and adjusts its
geometry in response to changes in watershed land use and climate
over long periods of time. When a river is in equilibrium with inputs of
sediment and discharge and bank vegetation, it develops a channel
planform and slope that tends to fluctuate around some observable
13
mean (eg. it will still move laterally) until some change in the driving
variables (land use, fire, climate etc.) which can result in some new
equilibrium, (different channel width, depth, and slope).
For urban settings, the time frame is accelerated due to rapid changes
in land use and up and downstream channel modifications (roads,
bridges, pipelines, dams). Therefore, the concepts of stability must be
restated.
Lateral Stability:
This defines the limits of expected lateral movements of the river for
the project. It will address the factors which control lateral stability and
project how far the river channel may move horizontally.
Vertical Stability:
Vertical stability is defined by the point at which the slope of the
stream, given the input of sediment and discharge, will tend to remain
stable or will not degrade (downcut) or aggrade (fill). Assessment of
vertical stability typically compares existing channel slope to the
projected “equilibrium slope” or “stable” slope.
The channel assessment procedure used in this report is shown in,
Figure 8. The inputs to the method are the flow duration curve (FDC)
from upstream of the DCLID No. 1, and assessment of the impacts of
future urbanization on the FDC using the SWAT Watershed Model (Soil
Water Assessment Tool). This procedure takes into account the
following:
• The assessment of the amount of sediment coming into the Levee
district from the upstream “Supply Reach”,
• the size, mobility, and rate of movement of the bed material in
the Supply Reach and the Levee District,
14
• and the predicted stable channel configuration of the channel in
the District to carry the sediment through the reach downstream.
Figure 8. Study Design for Assessing the Levee District
1.4 STUDY APPLICATIONS
This study is a supplement to the Hydraulic Assessment of the Levee
District being performed by Halff Associates, Inc. This study will give the
conditions under which stable channels, which carry sediment through
the Levee District, can be designed. The Halff Associates, Inc. study will
assess if the “stable channel and slope configurations” will allow for the
DCLID No. 1 to convey the design floods mandated by FEMA and the
USACE.
15
1.5 DATA SOURCES
The data for the flow analysis comes from gages operated by the USGS
and modeling performed using the SWAT Model. The field data was
obtained by the authors. There was no sediment transport data for the
project area (below Grapevine Dam) and hence, this was modeled using
empirical methods, and the Copeland (1994) and CSA methods.
1.6 LIMITATIONS AND ASSUMPTIONS
Ideally sediment data would be based on historical gaged sediment
load which could then be used to assess the actual input to the reach
which along with the gaged flow data would be the inputs for assessing
the stable design of the Levee Channel. Since no sediment data were
available, the channel was visually inspected in the field from the main
outlet and emergency spillway of Grapevine Lake to the upstream limit
of DCLID No.1. The same reach was inspected in historical photographs
on Google Earth. These inspections indicate that most of the sediment
reaching the Levee District is derived by bank and bed erosion between
the upstream limit of the Levee District and Highway 121. In the
analysis of future conditions within the Levee District, the assumption is
made that the sand supply furnished to the Levee District from these
sources will continue until the upstream channel is in equilibrium with
the changes in channel slope made within the Levee District during its
construction. This analysis is based on the assumption that no changes
will occur below the Levee District in terms of the channel
configuration, channelization, and/or modifications of the floodplain
conditions.
16
It is assumed that the sand supply furnished to the Levee District will
continue until the upstream channel is in equilibrium with the complex
flow regime derived from the dam, and rapid urbanization of the area
below the dam and above the Levee District. The sand supply furnished
to the Levee District will continue until the upstream channel is in
equilibrium with changes made to the channel slope within the Levee
District during its construction.
Since flow calculations are based on the Flow Duration Curve, and this
is subject to reservoir management practices by the USACE, any change
in reservoir management will have to be taken into consideration and
the output of the models used in this report recalibrated.
Finally, the equations and methods utilized in this study rely on past
studies of streams that have not been impacted through the combined
effects of dams, channelization, changing land use in the basin, and
levee containment of the floodplain. Therefore, the use of numerous
overlapping methods have been used to assess the potential changes in
the District and a weight of evidence approach adopted.
SECTION 2 -STUDY AREA DESCRIPTION
The DCLID No. 1 channel runs from Denton Tap (RM 28586) to RM
42000. Due to excavation and channelization (cutting off previous
meanders within the old Denton Creek Channel), within DCLID No. 1,
the channel slope changed from 0.0006 ft/ft to 0.00013 ft/ft. Normally
one would expect the channel slope to increase with channelization,
but in this case, it was substantially reduced.
17
The old channel, prior to channelization, is estimated to have a length
of 13,390ft from measurements of USGS topography maps; the existing
DCLID No. 1. channel length is approximately 10,741 ft. Assuming an
initial drop in elevation between the two stations of 8ft (443.55-435.46
elev. From Halff Associates, Inc.,2017), the change in slope would have
been from 0.0006 ft/ft (natural condition) to 0.00075ft/ft (channelized).
However, based on comparison of surveys (Halff Associates, Inc., 2017),
it appears that the elevation in the upper portion of the DCLID No.1
was reduced by excavation by 6.7 feet (443.55 to 436.86 elev., Halff
Associates, 2017). This resulted in a reduction in the elevation over the
entire reach to 1.4ft. (436.86-435.46 ft.; not 8ft). Therefore, the
resultant slope in the DCLID No.1 was reduced to 0.00013 ft/ft. (or 1.4
ft./ 10,741ft.).
The channel within DCLID No.1 has been dredged owing to
sedimentation (fine sand) within the excavated channel area which
effectively lowered conveyance of design floods. According to Halff
Associates, Inc. (2016), dredging of about 135,000 yards first took place
about 12 years after initial construction. Since this dredging event, the
channel has again deposited about 1-4 feet of sand in the excavated
bottom and reformed a small alluvial channel in the upstream to lower
third of DCLID No.1, Figure 9.
18
Figure 9. Channel formed since dredging above MacArther Rd. RM
36000
2.1 GEOLOGY
The bedrock of the upstream Supply Reach and the Levee District is
mapped as the Gulf Series Woodbine Formation and overlying Eagle
Ford Shale, Figure 10. These formations dip to the southeast at
approximately 100 feet per mile (Marr, 1986). It appears as if most of
the study area is underlain by the upper portion of the Woodbine
formation. The upper member of the Woodbine consists of 80-100 feet
of thin bedded fine- grained sandstone and sandy clay named the
Lewisville Member (Leggat, 1957; Dodge, 1952). Dodge (1952) divides
19
this member into an upper sand of 20 feet which grades downward to a
clayey sand.
The alluvium deposited by the river in past flood events consists
predominantly of fine sands. Historically, before the dam, floodplain
sedimentation resulted in 1-12 feet of sediment being deposited along
the channel banks with a decrease in thickness away from the channel
(USDA, SCS, 1956). The velocity of the overbank flows was less than
needed to scour the deposited fine sands. It is postulated that much of
the sediment, close to the channel was derived from pre-dam
sedimentation from Denton Creek Watershed. Overburden deposits
near the Grapevine Dam spillway excavation consisted of fine to
medium grained loose to medium dense sands with varying amount of
silt and clay, Figure 11. The dam spillway was excavated into a thick
layer of reddish brown massive fine- grained sandstone underlain by
soft sandy shale and glauconitic sandstone. Owing to the lack of boring
control in the area, it is unclear where the contact with the overlying
the Eagle Ford Shale occurs.
20
Figure 10. Geologic Map of the Study Area (Bureau of Economic
Geology, Dallas Sheet, Texas)
21
Figure11. Cross section at emergency spillway of Grapevine
Lake illustrating sands and interbedded shales.
Note the upper shales, and the lenticular sandstone bodies of the
Woodbine formation (Cameron, et. al. 1986) in Figure 11. Dodge (1952)
mapped 20 feet of fine sand over the shales (shown above) and termed
it the “upper sand”. It is apparently missing in the vicinity of the borings
in Figure 11., but is assumed to outcrop within the study area below the
dam.
22
2.2 SOILS
The soils mapped in the study corridor along the channel range from
clay, in the area directly below the dam, to silty clays in the vicinity of
the DCLID No.1, Figures 12,13. These mapped units are shown in the
following figures and their general properties in the associated table.
Field reconnaissance revealed that along the river banks, the material
appeared to be predominantly fine sand which does not correspond to
the mapped soils.
Figure 12. Percent Sand: Most of the lower Levee corridor is mapped
as the Frio Silty clay (36); the upper reach is mapped as Ovan clay (53).
23
Figure 13. Plasticity Index: Most of the lower Levee Corridor (light
Green) is mapped as Frio Silty Clay with Plasticity Index of 27-35.
Upstream, the soils along the stream are mapped as Ovan clay with a
Plasticity Index of 42.
Description of USDA soil map units along study reach. (Frio Silty Clay 36
and Ovan clay 53).
24
2.3 CLIMATE
Geomorphic processes are controlled by seasonal variations in
precipitation and temperature, Figures 14-16. In the study area, the
summers are hot and muggy and the winters are cold and windy. The
temperature varies from 35 to 96 F. The warm season ranged from June
3 to September 17 with an average high above 88 F. The cool season
lasts for 3 months from November 25th to February 24th with an annual
average daily temperature below 63 F.
https://weatherspark.com/y/8159/Average-Weather-in-Denton-Texas-United-States
Figure 14. Daily average ranges in temperature.
A chance of wet days (defined as having at least .04 inches of
precipitation), varies throughout the year. The wet season lasts 6.2
months from April 16 to October 21 with a greater than a 26% chance
of a given day being a wet day. The chance of having a wet day peaks
25
on May 31st with a 38% chance. The drier season lasts from October 21
to April 16th or 5.8 months.
https://weatherspark.com/y/8159/Average-Weather-in-Denton-Texas-United-States
Figure 15. Chance of precipitation
https://weatherspark.com/y/8159/Average-Weather-in-Denton-Texas-United-States
Figure 16. Average Monthly Rainfall
26
Rain falls throughout the year in the study area. Most rain falls in the
31 days centered on May 24 with an average rainfall of 4.4 inches in
that period. The least rain falls in the 31 days centered around the first
of August with an average accumulation of 1.6 inches. The annual
precipitation in the study area averages about 31.76 inches, ranging
from a low of 17.91 to a high of 51.03 inches per year. The average
length of the growing season is about 250 days. The average humidity is
about 53%.
SECTION 3 – HYDROLOGIC DATA
3.1 FLOW DURATION ANALYSIS
Flow duration data may be obtained directly from stream monitoring
gages or they can be estimated using a hydrologic simulation model.
The former may be obtained for USGS gage sites at
waterwatch.usgs.gov (toolkit/streamgage statistics) or
streamstats.usgs.gov., (Ries III, K.G., 2007). Since sediment transport
calculations used in this analysis are based on the flow duration curve,
the curve produced for the upstream gage, USGS 08055000 was
derived from the USGS Stream Stats site, Figure 17.
27
Figure 17. Flow duration curve of the gage above the Levee District (51
years)
The FDC represents the integration of daily flows for the period of
record and as such gives the probability of average daily flows for the
period under a variety of land use changes and may not reflect the
current or future conditions of the area. To assess the future flow
duration curve, two types of analysis were undertaken. First the land
use of the basin was assessed to analyze current conditions within the
basin as well as future land use trends.
28
Next, the flow duration curve was dissected to see how historical land
use changes may have affected the flow duration curve in the past.
Finally, using the SWAT model and modeling reservoir operations, a
simulation model run was made to look at probable future effects on
the FDC for the area with complete urban build out below the dam and
an urbanization increase of 20% above the dam Figure 18.
Figure 18. Current Land Use in the Denton Creek Watershed (Mock,
2016)
29
Figure 18., illustrates the current land use trends within the Denton
Creek Watershed. As stated, modeled changes in the flow duration
based on these trends do not seem to affect the outcome of the
Capacity Supply Analysis (CSA) of the Levee District. The major caveat
here would be that if the flow release management of Grapevine were
to change, the calculations will need to be reanalyzed.
The results of analyzing subsets of flow at USGS 08055000 for periods
of 1957-1991 and 2004-2015 and future SWAT Model scenarios were
undertaken to assess the effects of the rapid land use changes in the
area above and below the dam on the flow into the Levee District.
Figure 19 illustrates that the changes in land use appear to affect the
lower flows but, only slightly. This is interpreted to be a result of (1) the
majority of the flow at the gage is derived from the dam and therefore
subject to reservoir operations, and (2) the flows generated by the
areas below the reservoir, being derived from a much smaller area,
contribute to increases in the more frequent smaller flows.
Finally, modeling was done by analyzing the reservoir with the SWAT
model in which urbanization was changed by 20% in the Denton Creek
basin and the remaining land below the reservoir was filled in with
similar urban land uses. The results were similar to the 2005-2015 flow
duration, and again supporting the dominance of the dam and reservoir
operations on downstream flow. Later analysis in this report will
analyze the relationship between future land use changes, the FDC, and
stable channel and slope configurations.
30
Figure 19. Flow duration curves derived for USGS 08055000 using two
time periods to assess the changes in land use on flow and SWAT
Modeled Future Flow.
31
3.2 FLOOD FREQUENCY
Figure 20. Flood Frequency of the Study Area based on USGS
08055000.
Stream channel widths and depths worldwide seem to be related to
flows which average around the 1.5 to 2yr frequency. This will vary
somewhat by climate regime but is used as a first order estimate of
channel dimensions when used in conjunction with Mannings equation
and appropriate roughness estimates. Recent work in the United States
relating channel dimensions based on site assessment at stream gages
reinforces this assumption (Bieger, et. al., 2016). The flow corresponding
32
to this frequency in the study area ranges from 1076 to 1742cfs., Figure
20.
SECTION 4 -FIELD DATA
4.1 FIELD DATA COLLECTION SCOUR
Movement of sand within the channel occurs in two phases. At lower
flows, sand is moved along the smaller channel and at higher flows,
sand is moved along the entire bed of the levee area. Sand movement
typically occurs as bed load and as saltation load up to heights of 5-6 ft.
above the bed.
To assess sand movement in the Levee District, scour chains were
installed as well as stage sediment samplers. Scour and fill can be
measured with chains shown in Figures 21 and 22. Chains are installed
vertically and the amount of chain above the ground surface measured
upon installation. During a flood event, there may be both scour and
fill. During scour the chain will be exposed and during fill it may be
buried. If buried, the operator will dig the chain out and assess the
depth above the chain and compare this to the chain length to detail
scour and fill. Chains were installed along the channel just upstream of
McArther Rd. bridge. Because recovery time is intensive, the chains
were left in and only recovered once. The chains were located in the
channel portion in order to assess scour and fill in this area. In general,
the chains were covered as the sand migrated down basin as shown in
the Figure 22. Later on, in the spring (June), chains were again found as
the lower flows re-scoured the channel and uncovered the chains.
While not quantitative, the progression of sand movement observed
33
illustrates that sand will move down the broader bottom between the
Levee and Old Denton Creek as a wave during higher flows, and more
frequently along the smaller channel at lower flow regimes.
The amount of suspended sediment entering the DCLID No.1 appears
to be very small. Most of the sediment entering the District is fine sand
moving as bed and saltation load. This is based on three observations.
Stage sediment samplers were installed just downstream of Denton Tap
in order to assess suspended sediment concentrations entering the
DCLID No.1. Samplers were installed at 1-3 feet above the low flow
level at the upstream weir. In three events in which flow exceeded the
heights of the samplers, no fine sediment was recorded in the samplers
e.g. the water in the stage samplers was clear. Secondly, photographs
of large historic flows show the water flowing in the Levee district to be
clear (not muddy) which supports the assumed low amount of material
in suspension. Finally, field observations of sediment up the levee
banks following high flows was typically fine sands up to a height of 5
feet or so with little or no apparent clay draping.
34
Figure 21. Scour chains and assessment of aggradation/degradation
and stage samplers used to assess suspended sediment.
35
Figure 22. Evaluation of Scour chains. The flow moved the sand over
the chains burying the chains, subsequent flows during the spring (not
shown) uncovered the chains.
36
4.2 GRAIN SIZE AND SAND MOVEMENT
The sediment coming from the upstream reach or Supply Reach is
critical in determining the size and shape of a stable channel in the
Levee District. Most of sediment coming from the Supply Reach is fine
sand. This has been determined using two methods (1) analysis of
sediment coming down Denton Creek prior to the Dam which was
recorded and (2) bed material samples from below the Dam to Denton
Tap Road and down within the Levee District.
Figure 23. Illustrates the sediment in Denton Creek before Grapevine
Dam.
37
The bed material sediments in Denton Creek prior to Dam closure on
limited sampling consisted of 6% gravel, 51% sand and 43% silt and
clay, Figure 23 and 24. It is assumed that the Dam would stop about
95% of this sediment owing to the trap efficiency of large dams. The
large quantity of sand coming down Denton Creek prior to construction
of Grapevine Lake is thought to be the source of sand seen along
Denton Creek in the field surveys. It is assumed that this sand was
deposited prior to dam closing.
A longitudinal transect was made down the supply reach from Hwy
2499 into the Levee District. Sample sites are shown in yellow on the
map (Figure 25) and grainsize was calculated using a Malvern Laser
sediment analyzer. The similarity of the bed samples is remarkable.
Figure 24. Grain size categories.
38
Figure 25. Grainsize of bed material in Supply Reach of Levee District.
D(1) refers to 10% finer; d(2) to 20% finer than etc. The numbers are
given in micrometers. For example, 176.142 micrometers = .176mm.
39
The percent finer categories have been averaged in Figure 25 and the
D50 of the sediment is 0.175 mm or fine sand, similar to pre-dam
sediment and consistent with erosion of alluvial material derived from
the Woodbine formation.
Scour and movement of bed material is often calculated using Shields
equation where:
40
Figure 26. Shields Plot of Sand in Denton Creek
Using a slope of 0.0006-0.0008 and a water depth of 3 feet, the fine
sand would be mobile according to Shields relationship (the blue line
and small red dot indicate the point of incipient motion), Figure 26. The
large red dot, well above this line, indicates the conditions cited above
and show that the sand is highly mobile (above the blue threshold line)
and subject to suspension (above the red line) in Denton Creek.
Another way to assess sand mobility is to compare the critical tractive
force to thresholds given in the literature, Figures 27 and 28. Assuming
the same water depth and slope from above, the critical tractive force
would be:
41
Slope X depth X Unit weight water = Tractive Force
(0.0006 x 3 ft. x 62.4 lbs. /ft3) = .1123lbs./ft2
Comparison of this tractive force with the results in Figures, 27 and 28
indicates the sand in the channel is highly mobile at low flow depths.
From Fischenich, C., 2001: USCE EMRRP Stability Thresholds for Stream Restoration Materials
Figure 27. Critical Tractive Force Thresholds Channel Material. For
example, the calculations show that at .112psf, material up to fine
gravel could be moved in the channel.
42
Figure 28. Lane’s Tractive Force Graph (USDA, Part 654 NEH, chapter 9)
This figure similarly indicates the low critical tractive forces for the
sand.
Figure 28, similarly shows that at .175mm, the sand is mobile as the
calculated tractive force (.112psf) is greater than the critical tractive
force shown above which ranges from .02 to .07psf.
Sand moves from the Supply Reach (upstream of Denton Tap Bridge)
into DCLID No. 1 and fills the dredged area at an average horizontal fill
rate of 1.56 feet a day, Figure 29. This is based on the following
assumptions. (1) The sand is easily entrained as shown above at less
than 1.5 yr flow frequency. (2) Time series lateral sand movement was
43
evaluated visually in the Levee District using historical photographs
from 2002 to 2013 which illustrates the relative rate of infilling of sand
into the Levee District.
The photographic survey method makes a simplifiying assumption that
the sand is moving into the excavated area as a delta with prograding-
foreset beds. It actually moves as a series of waves. The sand is
supplied from the upstream Supply Reach. While this is a simplification
of actual processes, due to water clarity and repeated photographs,
one can see the front of the sand migration in annual photographs. The
top figure indicates the sand front as it progrades downstream. An
enlarged version is shown in the lower portion of, Figure 29.
The analysis indicates that the sand is filling the excavated area at an
average horizontal rate of 1.56 feet per day which corresponds to the
approximate fill time since the last dredging event. Comparison of this
rate with mean water velocity and particle speed of 0.19mm sand
shows comparable movement (Langbein and Leopold 1968) which
reinforces this approach, Figure 30.
44
Figure 29. Analysis of rate of sand migration/filling in Levee District
45
The annual volume of sand movement was computed using two
methods; Brownlie’s Transport equation and Yang’s D50 sand equation.
Both have been found to work well to predict sand transport. The two
equations were used as the output of bed material transport equations
can often be quite different as each equation is based on a different set
of assumptions and data sets. While the Brownlie equation is used in
the SAM program as well and the Capacity Supply Analysis Program,
Yang’s equation has been shown to give good results in sand bed
channels and is used extensively by the U.S. Bureau of Reclamation.
The total daily load coming into the Levee District was derived as the
product of the Supply Reach sand discharge from the Bed Material
Equations and the probability of the flow from the Flood Frequency
evaluation, Table 1. Note, that the equations assume unlimited sand
supply and therefore would be the maximum potential transport into
the Levee District. It is assumed this is a maximum transport rate. Prior
to construction of the dam, the daily average was approximately 55% of
Figure 30. Relation of mean water velocity and mean particle velocity (.19mm sand)
(Langbein and Leopold, 1968)
46
this amount. However, in degrading/widening channels, high sediment
yields as modeled are possible and, in terms of design would be
conservative giving maximum transport amounts.
Bed Material
Equation
Tons/day
Brownlie 410.26
Yang 515.18
Average 477.49
Table 1. Bed Material Computations for Supply Reach
4.3 CHANNEL ERODIBILITY AND FIELD EXAMPLES
4.3.1 Jet Testing and Channel Erodibility
Deposited sediment in the Levee District is very erodible with a critical
tractive force averaging 4.6Pa (0.096lbs./ft2) and, an erosion rate
constant of 9.2 cm/hr/Pa (25.5 cm3/N-sec) or (14.5 ft/hr/psf) and bulk
densities varying from 84-112 pcf. This is based on the average of three
submerged jet tests on channel material shown in the figure for the
Levee District Figures 31-33.
The submerged jet test procedure (Hanson and Cook, 2004; Wahl,
2016) allows either in situ or lab analysis of cohesive soil erodibility
parameters for the excess stress equation (1) where:
47
Er=Kd x (Te-Tc) x Time (hrs.) (1)
Er=erosion in cm
Kd=cm/hr/Pa (detachment coefficient)
Te= applied shear (unit weight water x R x S) in Pa
Tc= critical shear in Pa (Pascal)
The NRCS procedure computes Te as the product of (1-Cf) x (ns/n)2
where Cf is a cover factor based on type of cover and cover density.
(ns/n)2 is the grain roughness where ns = .0156 for cohesive fine-
grained material. “n” is Manning’s roughness factor for the channel.
Both Kd and Tc are given from the test results of the submerged jet. It is
always advisable to compare the Tc with literature. The NRCS gives a
value of 3.5 Pa for clays with a slight adjustment possible for void ratio
or compaction. Tc for sand has been given in Figure 27.
48
Figure 31. Illustrates the computation of the critical tractive force and
erosion rate constant. To the right is the jet test equipment.
49
Figure 32. Location, results, and plot of Tc versus Kd for alluvium in the
Levee District. Soils plot as very erodible. The three colored circles
represent the results of the three jet tests which fall in the erodible to
highly erodible categories.
50
Figure 33. Bulk density of sediment in the Levee District channel in
association with the Jet Test. (Multiply densities gm/cm3 X 62.4 to get
pcf)
It should be noted that the jet was run under bare soil conditions. If
grass/trees are established it can increase the critical tractive force
appreciably. Past work has shown a well grassed channel can be initially
equivalent to a 2in. cobble in terms of tractive force at the inception of
flow. However, grass tends to lose its strength over time so flow
duration should be taken into account when considering the
effectiveness of grass cover to resist erosion. Hoffmans (2012) indicates
that bare sand has a critical velocity (velocity at the inception of
motion) of from 1-2 fps; adding grass would increase this to 8.2fps or
over 4 times more resistant to erosion. The jet test results indicate that
the sand is very erodible with a low critical tractive force.
4.3.2 Channel Erosion Sequence
51
Figure 34. Illustrates the progression of bank erosion and failure in the
Supply Reach.
The erosion and bank failure occur in a recognizable sequence in the
reach and the progression is shown, Figure 34.
• Prolonged flow from upstream, exacerbated by the reservoir
releases, begins eroding at the toe of the channel. This area
remains more saturated due to the capillary rise of water from
the stream upwards into the bank. The large dry strength versus
smaller wet strength of the material was observed in the field
when tested with pocket penetrometers. As in the case of fine
sands and silts, the material loses it strength rapidly upon wetting.
• Depending on the duration of the flood, the soil around the roots
begins to be eroded and the undercut lower bank begins to
steepen (Figure 34, Steps I-II)
• Once the roots of the riparian vegetation are undercut, typically
when scour exceeds the depth of the root ball (about 2-3 feet),
the trees will fall into the channel (III Figure 34)
• Downed trees can dam the river and trap other woody debris,
partially blocking the channel. This can set up turbulent eddies
that increase local bed and bank scour
• Following tree loss, the channel banks will begin to fail depending
upon % slope and shear strength by either soil flows, slumps or
cantilever or wedge failures
• Widening of the channel will continue until the channel ceases to
degrade (which increases flood height) and the tractive force
along the banks is reduced below erosive levels.
52
4.3.3 Spillway Erosion
According to the USACE REMR Technical Note HY-FC-1 (1985):
Of concern is the potential for additional sediment into the Levee
District from erosion episodes of the emergency spillway as have been
observed in the past. Field and air photographic evidence supports the
hypothesis that due to the small channel size and dense riparian buffer
53
immediately downstream of the spillway, most of the sediment from
the more recent Spillway (2015) erosion episode was deposited on the
Grapevine Recreational Area and is not thought to be a major
contributor to the Levee District, Figures 35,36. Any channel alterations
of this vegetative buffer zone could change this condition resulting in
large amounts of sediment being released into Denton Creek. Future
reservoir operations should be evaluated in terms of both the
frequency of spillway releases and status and conveyance of this
emergency channel and its potential erosive effect on the riparian
buffer.
Figure 35. Flow at 560 ft. or greater during 2015. The Emergency
Spillway in 560 Elevation.
54
Figure 36. Google photographs showing pre-flood and post flood
sediment deposition downstream of Grapevine Dam. The dense
riparian buffer caused a large portion of sediment to be contained as
floodplain deposits shown in yellow overlay.
55
4.4 GEOMORPHIC EVALUATION REACHES
Figure 37. Geomorphic trends up and downstream of the Levee
District. Sex=existing channel slope and Seq= equilibrium channel slope.
Upstream of the DCLID No. 1, the reach is degrading (downcutting) as
illustrated in Figure 37. This is due largely to downstream
channelization. Due to the lower slope within the Levee District, ( as a
56
result of excavation for the DCLID No. 1.), the channel is aggrading or
filling, Figure 37.
The upstream progression of degradation (Figure 37) typically follows a
sequence shown in Figure 38 and termed the Channel Evolution Model
(CEM). The channel will begin degrading (due to the effects of
downstream channelization Stage 2. This is followed by widening,
(when the degradation depth exceeds the stable slope height), bank
instability, scour, and loss of riparian vegetation. Stage 4 occurs when
the channel has reached its final depth and width and begins to
stabilize and create a new flood plain at this lower level. The depth is
based on the equilibrium slope (See Section 6.5). Stage 5 is continued
stabilization of the new floodplain and overbank at this new level.
Figure 38. Channel Evolution Model (CEM) (h=bank height; hc=critical
bank height, Q2 is bankfull discharge)
57
In order to assess where the sediment was coming from below the dam
in the Supply Reach, a rapid field assessment of the channel from the
Dam spillway to the Levee District was performed at access points
along the channel. These results are shown in Figures 39-61 by river
station.
Figure 39. Location of the first Field Site shown with the arrow.
58
Figure 40. The top photograph shows the location of the photographs.
below, Old Denton Creek. Sand and Silt filling the channel bottom to a
depth estimated to be 2-6 feet.
59
Figure 41. Confluence of the tributary near Denton Tap, view is toward
the north as the creek flows into the Levee District. The main channel
of the Old Denton Creek is to the right of both photos.
Figure 42. Erosion along the small tributary entering near Denton Tap.
The bed material was pea gravel on the point bars, the channel sides
were moderately to severely scoured.
60
Figure 43. Showing the Channel Evolution Model for the Reach, the
Channel is in Stage 3, degrading and widening. The Cross Section shows
Cross Section 29330 Cross Section 35473
61
the historical FEMA cross sections and the latest survey in orange
indicating degradation.
Figure 44. Potential Breach of channel just upstream of the Levee
District, Downstream of Denton Tap. The width of the left photo above
is approximately 50-60 feet, the right photo is 90-100 ft.
62
Figure 45. Log Jam approximately 2000 feet upstream of Denton Tap.
The Log jam indicates undercutting of the bank and bank erosion which
leads to tree falls. This is typical of Stage 2-3 of the Channel Evolution
Model.
63
Figure 46. Bank scour and pooled channel indicating degradation in the
reach typical Stage 3 CEM.
64
Figure 47. Second Field Location Reference (red arrow indicates the
stage of the reach in the CEM model)
65
Figure 48. Reach beginning at Hwy 121. River in Stage 2 CEM.
66
Figure 49. Photos show hardpoint at east side of bridge at the USGS
gage and the scour near the bridge piers.
67
Figure 50. Illustrates the concrete structure upstream of 121 and the
channel constriction and scour.
68
Figure 51. Third Field Location reference and CEM model stage.
69
Figure 52. Location of Chute Bar overbank area shown in yellow in top
photograph and the sewer outfall and bank scour shown in the lower
photograph.
70
Figure 53. Photos of pooled bottom indicating bottom scour, sand
deposition at 5 feet in top right photograph and bank scour in top left
photograph. This together is indicative of a degrading active channel.
71
Figure 54. Location reference for site 4.
72
Figure 55. Upstream of Hwy 121, approximately station 17200,
concrete rip-rap in narrow section of channel, no evident degradation.
Figure 56. Same location but looking upstream and possible Woodbine
sandstone flags outcropping in bank.
73
Figure 57. Location reference for site 5.
74
Figure 58. Lakeside Rd. and river at grade, no degradation but bank
scour downstream and abundant tree falls in channel.
Figure 59. View up and downstream from Lakeside bridge. River station
13000 to 14000. Scour and trees downstream and stable channel
upstream.
75
Figure 60. Location reference for site 6. Hwy 2499, River station 9000
and no degradation observed.
76
Figure 61. View up and downstream from Hwy 2499. Looking
upstream River station 22000 and downstream to River station 23400.
Bank scour observed downstream.
77
SECTION 5 -HISTORICAL CHANNEL CHANGE
5.1 UPSTREAM SUPPLY REACH
Figure 62. Summary of Supply Reach extent from field observations
from approximately River station 18000 to downstream of Denton Tap,
River station 29000.
Base on field and survey evidence, Figure 62 shows the inferred extent
of the reach supplying sand bed material to the Levee District. The sand
is derived from both lateral scour of the banks and bed consistent with
the Channel Evolution Model. Figure 63 illustrates the composite plot
of the Levee District and the upstream degradation. The FEMA 1980
channel bottom (thalweg) is shown as a dashed line. The Halff
Associates, Inc. 2017 resurvey is shown as a smaller dashed line as the
78
current depth of scour. The original channel in the Levee District is
shown by the blue lines. The green line shows where the channel was
excavated and the red line the current channel position in the Levee
District.
Figure 63. Represents composite analysis of historical cross section
data.
79
Above Denton Tap, there is no field evidence of why there is an abrupt
lack of scour just below Hwy 121 at River station 35000 eg. is it
structural (man- made) or due to more resistant sandstone flags in the
Woodbine?
Figure 64. A more detailed cross section was prepared by Halff
Associates, Inc. within the DCLID No. 1 which illustrates the temporal
changes in the Levee District as a supplement to Figure 63. (Note the
axis is reversed from the previous figure).
80
Figure 64. illustrates that when the Levee was excavated for flood flow
conveyance (gray line), the channel slope was reduced upstream of
station 23000 and increased below 23000. The channel has
subsequently reestablished grade by filling back to the original slope of
the channel through sand supplied by scouring in the Supply Reach.
SECTION 6 -CHANNEL STABILITY AND CAPACITY SUPPLY
ANALYSIS
To assess the long- term stability of a potential channel within the
Levee District, there are several methods that were used. They are: (1)
Simple empirical methods based on similar stream types, (2) SAM after
Copeland (1994), and (3) Full Spectrum Capacity Supply Analysis after
Stroth (2017). Each method represents a somewhat different approach
to establishing channel morphology. In studies like this it has been
shown that the weight of evidence approach appears to offer the most
robust explanation of potential channel change (Pemberton and Lara,
1984).
6.1 EMPIRICAL METHODS
6.1.1 Soar and Thorne (2001)
Work by Soar and Thorne (2001) gives estimates of sand bed channels
based on density of trees on the bank. Calculations based on these
equations and a bankfull discharge of 1700 cfs (48cms) gives a bankfull
81
width of w=74 feet (22.6m) with vegetation and about w=115 ft. (35m)
with no vegetation Figures 65,66.
Figure 65. Width discharge relationships for US sand bed channels with
variation in tree cover. The regressions given below in the table. (USDA
Chapter 9, Part 654 Stream Restoration Design, NEH).
Figure 66. w= aQb Relationship of Discharge to channel width in sand
streams. Soar and Thorne (2001) USACE ERDC/CHL CR-01-1
82
6.1.2 Parker Sand Channel Regression
A second method was analyzed which was based on multiple regression
of a modified dataset prepared by Parker at (www.nced.umn.edu) for
sand bed channels. The data set and regressions are shown, Figure 67.
Figure 67. Data set and regressions for sand channels adapted from
NCED data from Parker.
While a smaller data set, than compiled by Parker, the streams chosen
were for basins with similar range of characteristics as the study site.
Given the same discharge of 1700cfs (48cms) and a channel slope
of .0004 and 0.2mm sediment size, the result is a w=25m (82ft.),
d=2.06m (6.7ft) and equilibrium slope of 0.000367. Alternatively,
83
equations by Parker (2009; Figure 68) give the following similar results
for a larger dataset with w=33m (108ft.), depth d=1.65m (5.4ft) and
slope of 0.000398.
Figure 68. Equations from Parker, 2009 (Hydraulic Geometry of
Lowland Sand-Bed rivers. NCED.)
6.1.3 USACE Analytical Charts
Several investigators, shown in the USACE manual (1994) have
proposed that stable channel dimensions can be calculated analytically
based on simultaneous solution of the governing equations (discharge,
sediment transport and bed material composition as independent
variables and width depth and slope as dependent variables) Figure 69.
These methods have typically been done on sand bed channels and are
subject to the assumptions made to optimize the solutions; the
equations rely on optimizing the solution to achieve the best channel
dimensions that can move the bed material with the least steam
power. The approaches also assume alluvial channels or ones with no
boundary constraints such as vegetation and or bedrock.
84
Figure 69. USACE Extremal Plot of channel slope width, depth and
bankfull discharge (USACE EM 1110-2-1418). The red dots indicate the
plot of Denton Creek at a discharge of 1700 cfs.
85
6.2 SAM
Stable channel dimensions can be calculated with analytical methods
using programs such as the USACE SAM (Thomas, Copeland, and
McComas, 2003). This program calculates stable channel dimensions
that will pass a specified sediment load without erosion or deposition.
The approach determines the dependent variables of channel width,
depth and slope from independent variables of dominant discharge,
sediment inflow, and bed material composition by solving flow
resistance and sediment transport simultaneously, Figure 70.
86
Figure 70. Results of SAM for 1700 cfs and 500 ppm suspended
sediment concentration for reach.
Results of the Sam model indicate a bottom width of 57 feet. At a 1:1
side slope and 8 feet deep, the bottom width is 57 ft., the top width is
73 ft. (22.2m) and the slope is .000403.
6.3 EQUILIBRIUM SLOPE
In addition to methods above, Pemberton and Lara (1984) give ways to
assess limits of degradation essentially back-solving bed load transport
equations. One example is given here using the Meyer Peter Mueller
equation. (Shields equation gave similar results), Figure 71. It is felt that
87
these should be considered a worst-case degradation limit. Potential
drop indicates the potential for increased degradation from River
station 36345 (elev. 441.44) to station 28330 (elev. 432.94). This infers
a worst case of up to 8 .11 feet of continued degradation is possible.
Using the other calculations of 0.00041, degradation would still be
appreciable or 5.62 feet.
Figure 71. Results of MPM Equilibrium slope computation (USDA NEH
654).
88
6.4 CAPACITY SUPPLY ANALYSIS
The Capacity/Supply Ratio (CSR) approach is an extension of the
SAMWIN method of analytical channel design for sand channels, Figure
72. This method balances the sediment transport capacity of a design
reach with the sediment supply of an upstream reach over the entire
flow duration curve rather than a single discharge (Stroth, Bledsoe and
Nelson, 2017). The CSR Tool was employed to efficiently utilize design
techniques that can promote sediment balance in the system thereby
ensuring better long- term channel stability in restoration reaches. The
method has been tested in over 18 sand bed channels across the
United States with positive results.
Basically, as shown in Figure 72, the CSR is defined as the bed material
load transported through the river reach by a sequence of flows over an
extended period of time divided by the bed material load transported
into the reach by the same sequence of flows over the same time
period (Stroth, Bledsoe, and Nelson, 2017). A CSR greater than one
means degradation and a CSR less than one aggradation. A stream
would be in equilibrium when the CSR=1 or the channel width and
depth and slope are in equilibrium with the discharge and sediment
supply.
Three scenarios were run using the CSR Model: (1) Low urbanization
period, 1957-1991, (2) rapidly urbanizing period, 2004-2015, and (3)
projected high urbanization period (SWAT modeled FDC).
89
Figure 72. The CSR Method illustrating the balance between incoming
sediment and the capacity of the design reach to convey this sediment
without aggradation or degradation (Stroth, 2017).
90
Figure 73. Results of Capacity Supply Analysis of Levee District Channel.
The lines represent the best solution between deposition (below) the
lines) and erosion (above the lines). The optimal solution is at the
lowest point on the curve.
The results of the analysis for the CSR indicate that as the basin
urbanizes, the equilibrium shifts to the left (less width), and upward,
91
(slightly greater slope), Figure 73. The slope for the less urbanized basin
is 0.000438 and for the more urbanized basin 0.000455. The bottom
widths are 53 feet for the less urbanized basin and 47 feet for the more
urbanized basin. SWAT Model simulation of complete build out below
the dam and 20% increase in the basin increased slope to 0.000467, but
channel width remained the same. The results indicate the only minor
changes in the equilibrium channel design would have occurred in the
Levee District since its construction. The long term attenuated flow
releases from the dam are a major buffer within the system which
prevents large changes in channel morphology.
Summarizing the different methods:
• the mean channel top width is 88.7 feet with a standard deviation
of 18.7
• the channel slope is .00038 with a standard deviation of
5.667 E-05.
• Assuming a 6 ft. deep channel, the bottom width would be
approximately 53 ft. at a 3:1 side slope. (The width will be
narrower depending on vegetative control.
• Vegetation can reduce width up to 35% according to Anderson et
al. (2002) where:
92
From Anderson, Bledsoe, and Hession, (2002)
6.5 PLANFORM ANALYSIS
In order to assess what the channel within the Levee District will tend
to do given the discharge, sediment, and design width, regime
equations were used to derive potential meander dimensions for the
area based on work by Soar and Thorne (2001) and Mecklenberg (2005)
from the Ohio, DNR. Given downstream channel sinuosity of 1.3 from
average meander geometry downstream of the Levee District, and a
top width of 89ft., the meander dimensions are given in Figure 74.
93
Figure 74. Regime channel planform for a sinuosity of 1.3 and width of
89ft.
Figure 74 indicates that meanders with the basic channel dimensions of
the Levee District channel cited above, will typically be larger than the
boundaries of the Levee District with an amplitude of 407ft. This
implies that the channel within the Levee will tend to erode the
boundaries of the Levee District as it tries to obtain this approximate
planform dimension (for example just above the bridge at MacArthur
94
Blvd.). As the meanders are constrained within the Levee District
(Levees and narrower floodplain), armoring and scour protection will be
needed in areas where the channel attempts to increase the meander
amplitude and undercuts the Levee. The authors know of no way to
predict the meander pattern with such planform constraints other than
by periodic observations. Future bank protection will need to be
performed in areas where it undercuts the existing Levee. Armoring the
banks through structural or biological-soft vegetative methods can
reduce the lateral movement as is seen in the “Old Denton Creek”
channel.
SECTION 7 -CONCLUSIONS AND RECOMMENDATIONS
1. Bed material entering the Levee District is derived from the
upstream Supply Reach.
2. Spillway erosion episodes in the past have generated a lot of
sediment. It is thought that much of this sediment was deposited
in the Grapevine Recreational Area due to the downstream small
channel size and dense riparian cover.
95
3. Degradation below dams is often cited as a means for sediment
generation. While emergency spillway erosion does generate
substantial sediment as stated it appears to be deposited before
entering the Denton Creek channel. Channel downcutting below
dams does occur (Williams and Wolman, 1984; Dunn and Raines,
2001) and can generate substantial sediment. In the study reach, it
is felt that generation of sediment from degradation following dam
construction is minimal based on two points (a). no degradation
was observed downstream of the outlet works in the field survey,
at the next bridge sections, or from resurveys of the channel by
Halff Associates, Inc. and (b.) the dam was built in 1952 and as up
to 75% of the degradation occurs in the few years after dam
closure, (Williams and Wolman, 1984), it is felt that much of the
degradation should have occurred already.
4. Field surveys indicate that the Supply Reach extends upstream
past Hwy 121.The supply of sand which enters the Levee District
comes from the upstream channel of Denton Creek that is
degrading and widening. The Supply Reach follows typical trends in
degrading channels termed the Channel Evolution Model (CEM).
5. The current channel degradation is attributed to past excavation
and lowering the slope near the upper portion of the Levee District
during Levee construction around mid-1986.
6. The bed material moving into the Levee District is fine sand with a
D50 of 0.175mm. No armoring is anticipated in the reach.
7. Incipient motion and scour chain analysis demonstrates that the
sand is easily entrained with high frequency flows at depths of less
than 3 feet.
8. The channel bed material is highly erodible as indicated with
submerged jet testing. Vegetation on the deposited sand surface is
shown to be a factor in the in the scour of the sand in the channel.
96
Grass and other cover vegetation reduces the erodibility of the
sand.
9. It has been shown that after excavation of the sand in the Levee
District to enhance flood conveyance in late 2002, sand has
redeposited within the Levee District, filling the Levee District in a
downstream direction at a rate of approximately 1.6 feet per year.
10. Sand has filled the first abandoned channel of the Denton Creek
within the District to a depth of 2-6 feet. The second old channel
segment near MacArthur, remains clean with less deposition.
While some channel narrowing has occurred in this areathis
channel, (observed bank berms), flow has been maintained within
this segment. One slope failure was observed in this channel
segment of “Old Denton Creek”.
11. Historical and recent surveys of the channel in the Levee District
show that following excavation below the grade of “Old Denton
Creek”, the channel slope was reestablished at the original river
grade by deposition of sediment, indicating that this was close to
the preferred slope of the reach.
12. Capacity Supply Ratio (CSR) was performed on the Levee District
utilizing upstream Flow Duration Curves (USGS 08055000) as well as
modeled future flow using the SWAT model. The analysis gives the
equilibrium channel dimensions and channel slope to be expected
from past reservoir operations and bedload transport calculations.
13. The CSR indicated a design slope of 0.00045, top width 69 feet,
depth 6 feet, and a dominant discharge of around 1700 cfs. This was
similar to outputs of the SAM model, the regional regression
equations, and USACE charts for stable channels. Summarizing the
different methods, the mean channel top width is 88.7 feet with a
standard deviation of 18.7 and the channel slope is .00038 with a
standard deviation of 5.667 E-05. Assuming a 6 ft. deep channel,
97
the bottom width would be approximately 53 ft. at a 3:1 side slope.
(The width will be narrower depending on vegetative control.
Vegetation can reduce width up to 35% according to Anderson et
al., 2002). It has been observed that vegetation will quickly establish
within the Levee District channel beginning with grass and then
trees. While this will tend to stabilize the channel, it can have an
effect on roughness (Mannings) and will have to be considered in
future District maintenance as well as conveyance considerations.
14. The channel within the Levee District will continue to meander to
try and achieve a more stable meander pattern given the sediment
and flow regime. This may result in areas where the channel
undercuts the Levee. These areas will have to be monitored and bed
and bank protection provided to insure Levee integrity.
15. The CSR analysis indicates that the potential exists for up to 410
tons per day of bed material can be transported into the Levee
District. This is 149,650 tons per year assuming unlimited upstream
supply and 100% transport efficiency.
16. Using a combination of the CSR Analysis and the Yang equation, the
design amount of sand material entering the district is modeled as
being 477 tons/day or 174,105 tons per year.
17. The past contracted dredged amount was 135,000 cubic yards or
about 182,000 tons (at 100pcf). This represents the material
deposited over 14 years (Halff, 2017). This estimate, would amount
to 13,000 tons per year being deposited in the Levee District or an
7.5% of the maximum transport capacity (#15, above). The
remainder of the sediment predicted by the model (92.5% of the
sand bed material) is passed through the Levee District downstream.
This latter amount could be less as the bedload modeled coming
into the reach assumes 100% efficiency and unlimited supply of bed
material once the critical tractive force of the bed material is
98
exceeded; the formulas assume that there is no limit on the amount
of sand being furnished by the upstream Supply Reach.
18. It is hypothesized that since the sand is transported mainly through
bed and saltation load, that if the downstream Levee District
channel is designed to be 6ft in depth, and 69 feet wide, that much
of the material movement will be confined to the channel and
therefore, more of the material will be bypassed downstream and
less deposition will occur within the District. This channel
configuration as well as channel side slope stability and roughness
will have to be assessed with the other objectives of Flood
conveyance within the District.
Figure 75. Height of sand above bed. (USDA, NEH Section3). For
medium sand most of the action will be below 5-6 feet depth.
99
19. The final question remains as to how long will sediment be derived
from the Supply Reach as it only obtains sand from the reach below
Grapevine Dam. At the same level of efficiency (<7.5%), of total load,
assuming the Supply Reach reaches an equilibrium slope, and there
is bank erosion accordance with the CEM, up to an additional
6,078,483 tons, (which is the length of the supply reach (7430 ft),
times the ultimate increased depth within the supply reach (8 ft),
times the ultimate increase in the width of the supply reach (28 ft),
time the density of the material (100 pcf/2000 p/ton)) could be
derived from the Supply reach up to Highway 121. This would
indicate at minimum 35 year of supply of sand or at similar
depositional rates, (455,886 tons of additional sediment deposited
in DCLID No. 1). Given the past rates of dredging, this would indicate
that dredging on the scale of 2002 would need to be done about 3
more times over the next 35 years before projected sand supply is
decreased from the Supply Reach. This also assumes that the
depositional rate in the DCLID No. 1 is not changed through
vegetation growth or structural modifications of the channel.
20. It is anticipated that based on observations in the channel from
Denton Tap past Hwy 121, that the channel will continue to degrade
and widen according to the Channel Evolution Model (CEM) for
many years. Exact timing of this is related to flood flow releases by
USACE. Degradation and widening can be limited by installation of
engineered grade control.
21. It is recommended that prior to any major engineering project that
up and downstream borings be taken to obtain the depth and type
of bedrock below the channel bottom. This will help in design of any
grade control structures as well as better evaluate the potential
limits of degradation.
100
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(1994). SWAT: Soil and water assessment tool. US Department of
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Bieger, Katrin, Hendrik Rathjens, Peter M. Allen, and Jeffrey G.
Arnold, 2015. Development and Evaluation of Bankfull Hydraulic
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(JAWRA) 51(3): 842-858. DOI: 10.1111/jawr.12282
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APPENDIX C: COST ESTIMATES
Item Unit Quantity Unit Price Rounded Cost
Sediment Trap
Mobilization LS 1 $1,097,000 $1,097,000
Care of Water LS 1 $50,000 $50,000
Storm Water Pollution Prevention Plan LS 1 $296,385 $296,390
Implement Erosion Control Plan LS 1 $296,385 $296,390
Performance Bonds LS 1 $493,975 $493,980
Clearing and Grubbing AC 5 $7,500 $37,500
Seeding for Erosion Control SY 1,300 $0.53 $690
Excavation (Channel)CY 84,208 $15 $1,263,130
Erosion Control Mats SY 1,300 $15 $19,500
Concrete Class "B"CY 7,017 $500 $3,508,680
Operation and Maintenance (Dredge approximately every seven years) CY 421,040 $15 $5,000,000
Estimated Cost $12,064,000
Dredge Old Channel and Bypass Channel back to Design
Storm Water Pollution Prevention Plan LS 1 $144,629 $144,630
Care of Water LS 1 $50,000 $50,000
Implement Erosion Control Plan LS 1 $140,417 $140,420
Excavation (Channel)CY 294,670 $15 $4,420,050.00
Clearing and Grubbing (Channel)AC 10 $7,500 $75,000
Seeding - Channel SY 250,000 $0.53 $132,500
Erosion Control Mats SY 200 $15 $3,000
Estimated Cost $4,966,000
Reestablish Toe of Levee Upstream of MacArthur Boulvevard
Storm Water Pollution Prevention Plan LS 1 $10,226 $10,230
Care of Water LS 1 $30,000 $30,000
Implement Erosion Control Plan LS 1 $9,928 $9,930
24" Rock Riprap CY 2,100 $115 $241,500
Embankment CY 1,900 $25 $47,500
Geotextile (8 oz. minimum)SY 6,200 $1 $6,200
Top Soil CY 700 $5 $3,500
Seeding SY 4,200 $0.53 $2,230
Estimated Cost $352,000
Repair Erosion at Upstream Weir
Storm Water Pollution Prevention Plan LS 1 $10,850 $10,850
Care of Water LS 1 $50,000 $50,000
Implement Erosion Control Plan LS 1 $3,160 $3,160
Coffer Dam SF 600 $57 $34,200
Remove and Stockpile Existing Rock Riprap CY 260 $6 $1,560
Excavation (Channel)CY 1,080 $15 $16,200
24" Rock Riprap CY 20 $115 $2,300
Embankment CY 10 $25 $250
Top Soil CY 10 $5 $50
Seeding SY 35 $0.53 $20
Remove Concrete SY 76 $10 $760
Estimated Costs $120,000
SUBTOTAL $17,502,000
40% Construction Contingency $7,000,800
TOTAL ESTIMATED CONSTRUCTION COST $24,502,800
15% Engineering Services1 $3,675,420
Total $28,200,000
Assumptions:
1. Cost of the Engineering Services is based on 15% of the estimates construction cost, including contingency.
2. All cost are in 2017 US Dollars as of October 2017.
These estimates were prepared utilizing standard cost estimating practices. These statements exclude "soft" costs including, but not limited to, administrative costs, financing costs, USACE
permitting, geotechnical investigations, and construction materials testing. It is understood and agreed that this is an estimate only, and that Engineer shall not be liable to Owner or to a third party
for any failure to accurately estimate the cost of the project, or any part thereof.
Denton Creek Drainage Study
ALTERNATIVE 1
Engineer's Opinion of Probable Cost
BY
HALFF ASSOCIATES, INC
Sediment Trap
3. Rounded Cost for the Sediment Trap O&M is the approximate cost for dredging five times over the estimated 35 years left of sediment from the Supply Reach.
Item Unit Quantity Unit Price Rounded Cost
Berms
Mobilization LS 1 $33,000 $33,000
Care of Water LS 1 $50,000 $50,000
Storm Water Pollution Prevention Plan LS 1 $8,887 $8,890
Implement Erosion Control Plan LS 1 $8,887 $8,890
Performance Bonds LS 1 $15,000 $15,000
Clearing and Grubbing AC 5.0 $7,500 $37,500
Seeding for Erosion Control SY 39,000 $0.53 $20,670
Embankment CY 8,901 $15 $133,510
Erosion Control Mats SY 200 $15 $3,000
24" Rock Riprap CY 448 $115 $51,540
Estimated Cost $362,000
Dredge Old Channel and Bypass Channel back to Design
Storm Water Pollution Prevention Plan LS 1 $144,629 $144,630
Care of Water LS 1 $50,000 $50,000
Implement Erosion Control Plan LS 1 $140,417 $140,420
Excavation (Channel)CY 294,670 $15 $4,420,050.00
Clearing and Grubbing (Channel)AC 10 $7,500 $75,000
Seeding - Channel SY 250,000 $0.53 $132,500
Erosion Control Mats SY 200 $15 $3,000
Estimated Cost $4,966,000
Reestablish Toe of Levee Upstream of MacArthur Boulvevard
Storm Water Pollution Prevention Plan LS 1 $10,226 $10,230
Care of Water LS 1 $30,000 $30,000
Implement Erosion Control Plan LS 1 $9,928 $9,930
24" Rock Riprap CY 2,100 $115 $241,500
Embankment CY 1,900 $25 $47,500
Geotextile (8 oz. minimum)SY 6,200 $1 $6,200
Top Soil CY 700 $5 $3,500
Seeding SY 4,200 $0.53 $2,230
Estimated Cost $352,000
Repair Erosion at Upstream Weir
Storm Water Pollution Prevention Plan LS 1 $10,850 $10,850
Care of Water LS 1 $50,000 $50,000
Implement Erosion Control Plan LS 1 $3,160 $3,160
Coffer Dam SF 600 $57 $34,200
Remove and Stockpile Existing Rock Riprap CY 260 $6 $1,560
Excavation (Channel)CY 1,080 $15 $16,200
24" Rock Riprap CY 20 $115 $2,300
Embankment CY 10 $25 $250
Top Soil CY 10 $5 $50
Seeding SY 35 $0.53 $20
Remove Concrete SY 76 $10 $760
Estimated Costs $120,000
SUBTOTAL $5,800,000
40% Construction Contingency $2,320,000
TOTAL ESTIMATED CONSTRUCTION COST $8,120,000
15% Engineering Services1 $1,218,000
Total $9,400,000
Assumptions:
1. Cost of the Engineering Services is based on 15% of the estimates construction cost, including contingency.
2. All cost are in 2017 US Dollars as of October 2017.
These estimates were prepared utilizing standard cost estimating practices. These statements exclude "soft" costs including, but not limited to, administrative costs, financing costs, USACE
permitting, geotechnical investigations, and construction materials testing. It is understood and agreed that this is an estimate only, and that Engineer shall not be liable to Owner or to a third party
for any failure to accurately estimate the cost of the project, or any part thereof.
Denton Creek Drainage Study
ALTERNATIVE 2
Engineer's Opinion of Probable Cost
BY
HALFF ASSOCIATES, INC
Old Denton Creek Diversion
Item Unit Quantity Unit Price Rounded Cost
Dredge Old Channel and Bypass Channel back to Design
Mobilization LS 1 $519,542 $519,542
Storm Water Pollution Prevention Plan LS 1 $140,417 $140,420
Care of Water LS 1 $50,000 $50,000
Implement Erosion Control Plan LS 1 $140,417 $140,420
Performance Bonds LS 1 $234,028 $234,030
Excavation (Channel)CY 294,670 $15 $4,420,050.00
Clearing and Grubbing (Channel)AC 10 $7,500 $75,000
Seeding - Channel SY 250,000 $0.53 $132,500
Erosion Control Mats SY 200 $15 $3,000
Estimated Cost $5,715,000
Future Estimated Cost*$17,000,000
Reestablish Toe of Levee Upstream of MacArthur Boulvevard
Storm Water Pollution Prevention Plan LS 1 $10,226 $10,230
Care of Water LS 1 $30,000 $30,000
Implement Erosion Control Plan LS 1 $9,928 $9,930
24" Rock Riprap CY 2,100 $115 $241,500
Embankment CY 1,900 $25 $47,500
Geotextile (8 oz. minimum)SY 6,200 $1 $6,200
Top Soil CY 700 $5 $3,500
Seeding SY 4,200 $0.53 $2,230
Estimated Cost $352,000
Repair Erosion at Upstream Weir
Storm Water Pollution Prevention Plan LS 1 $10,850 $10,850
Care of Water LS 1 $50,000 $50,000
Implement Erosion Control Plan LS 1 $3,160 $3,160
Coffer Dam SF 600 $57 $34,200
Remove and Stockpile Existing Rock Riprap CY 260 $6 $1,560
Excavation (Channel)CY 1,080 $15 $16,200
24" Rock Riprap CY 20 $115 $2,300
Embankment CY 10 $25 $250
Top Soil CY 10 $5 $50
Seeding SY 35 $0.53 $20
Remove Concrete SY 76 $10 $760
Estimated Costs $120,000
SUBTOTAL $23,187,000
40% Construction Contingency $9,274,800
TOTAL ESTIMATED CONSTRUCTION COST $32,461,800
15% Engineering Services1 $4,869,270
Total $37,400,000
Assumptions:
1. Cost of the Engineering Services is based on 15% of the estimates construction cost, including contingency.
2. All cost are in 2017 US Dollars as of October 2017.
These estimates were prepared utilizing standard cost estimating practices. These statements exclude "soft" costs including, but not limited to, administrative costs, financing costs, USACE
permitting, geotechnical investigations, and construction materials testing. It is understood and agreed that this is an estimate only, and that Engineer shall not be liable to Owner or to a third party
for any failure to accurately estimate the cost of the project, or any part thereof.
3. Furture Estimated Cost for the dredging is the approximate cost of dredging the flood control channel and old channel (approximately once every 10 years) over the
estimated 35 years of sediment left from the Supply Reach
Denton Creek Drainage Study
Engineer's Opinion of Probable Cost
BY
HALFF ASSOCIATES, INC
Dredging
APPENDIX D: HEC-HMS OUTPUT
Project: Denton2012Future Analysis: DCLID_001yr_1min Run: DCLID_001yr_1min
Start of Run: 01Jan2012, 00:00 Basin Model: DCLID_001yr_1min
End of Run: 02Jan2012, 00:00 Meteorologic Model: 1−Year
Compute Time: 13Oct2017, 12:40:22 Control Specifications: Control 1_1min
Analysis
Point
Drainage Area
(MI2)
Peak Discharge
(CFS)
Time of Peak
DCLID_J0020 1.57 1599.56 01Jan2012, 12:24
DCLID_J0030 1.64 1597.97 01Jan2012, 12:32
DCLID_J0040 2.45 2188.41 01Jan2012, 12:32
DCLID_J0050 2.48 2175.46 01Jan2012, 12:36
DCLID_J0060 3.70 3247.26 01Jan2012, 12:36
DCLID_J0070 4.72 3498.26 01Jan2012, 12:59
DCLID_J0080 5.22 3620.71 01Jan2012, 12:59
DCLID_J0090 5.30 3607.08 01Jan2012, 13:03
DCLID_J0100 5.46 3553.60 01Jan2012, 13:14
DCLID_J0110 5.47 3496.52 01Jan2012, 13:27
DCLID_J0120 8.49 4425.47 01Jan2012, 13:24
DCLID_J0130 8.62 4431.39 01Jan2012, 13:25
DCLID_J0140 8.67 4410.19 01Jan2012, 13:35
DCLID_J0150 9.59 4476.14 01Jan2012, 13:34
DCLID_J0160 9.84 4407.80 01Jan2012, 14:02
DCLID_J0170 10.18 4425.44 01Jan2012, 14:02
DCLID_J0180 10.28 4425.20 01Jan2012, 14:03
DCLID_J0190 10.50 4418.08 01Jan2012, 14:11
DCLID_J0200 11.13 4445.64 01Jan2012, 14:11
DCLID_J0210 11.17 4440.01 01Jan2012, 14:16
DCLID_J0230 11.93 4474.43 01Jan2012, 14:16
DCLID_J0240 12.33 4432.82 01Jan2012, 14:34
DCLID_J0250 12.75 4431.52 01Jan2012, 14:42
DCLID_J0260 18.86 5804.94 01Jan2012, 14:10
DCLID_J0270 19.28 5784.14 01Jan2012, 14:32
DCLID_J0280 20.62 5772.67 01Jan2012, 15:00
DCLID_J0290 22.30 5719.43 01Jan2012, 15:37
DCLID_JOutlet 25.42 5824.38 01Jan2012, 16:35
Project: Denton2012Future Analysis: DCLID_002yr_1min Run: DCLID_002yr_1min
Start of Run: 01Jan2012, 00:00 Basin Model: DCLID_002yr_1min
End of Run: 02Jan2012, 00:00 Meteorologic Model: 2−year
Compute Time: 13Oct2017, 12:41:44 Control Specifications: Control 1_1min
Analysis
Point
Drainage Area
(MI2)
Peak Discharge
(CFS)
Time of Peak
DCLID_J0020 1.57 2282.62 01Jan2012, 12:23
DCLID_J0030 1.64 2285.04 01Jan2012, 12:30
DCLID_J0040 2.45 3178.93 01Jan2012, 12:31
DCLID_J0050 2.48 3163.00 01Jan2012, 12:35
DCLID_J0060 3.70 4605.27 01Jan2012, 12:34
DCLID_J0070 4.72 4978.79 01Jan2012, 12:57
DCLID_J0080 5.22 5151.17 01Jan2012, 12:56
DCLID_J0090 5.30 5097.31 01Jan2012, 13:03
DCLID_J0100 5.46 5029.85 01Jan2012, 13:14
DCLID_J0110 5.47 4965.85 01Jan2012, 13:26
DCLID_J0120 8.49 6383.23 01Jan2012, 13:22
DCLID_J0130 8.62 6376.28 01Jan2012, 13:25
DCLID_J0140 8.67 6323.75 01Jan2012, 13:35
DCLID_J0150 9.59 6415.29 01Jan2012, 13:35
DCLID_J0160 9.84 6294.90 01Jan2012, 14:00
DCLID_J0170 10.18 6322.38 01Jan2012, 14:00
DCLID_J0180 10.28 6321.21 01Jan2012, 14:02
DCLID_J0190 10.50 6281.30 01Jan2012, 14:13
DCLID_J0200 11.13 6323.02 01Jan2012, 14:13
DCLID_J0210 11.17 6286.78 01Jan2012, 14:23
DCLID_J0230 11.93 6334.13 01Jan2012, 14:22
DCLID_J0240 12.33 6300.77 01Jan2012, 14:36
DCLID_J0250 12.75 6294.87 01Jan2012, 14:44
DCLID_J0260 18.86 8139.96 01Jan2012, 14:05
DCLID_J0270 19.28 8128.60 01Jan2012, 14:26
DCLID_J0280 20.62 8131.86 01Jan2012, 14:50
DCLID_J0290 22.30 8441.97 01Jan2012, 15:25
DCLID_JOutlet 25.42 8655.69 01Jan2012, 16:23
Project: Denton2012Future Analysis: DCLID_005yr_1min Run: DCLID_005yr_1min
Start of Run: 01Jan2012, 00:00 Basin Model: DCLID_005yr_1min
End of Run: 02Jan2012, 00:00 Meteorologic Model: 5−Year
Compute Time: 13Oct2017, 12:43:07 Control Specifications: Control 1_1min
Analysis
Point
Drainage Area
(MI2)
Peak Discharge
(CFS)
Time of Peak
DCLID_J0020 1.57 3021.00 01Jan2012, 12:22
DCLID_J0030 1.64 3045.79 01Jan2012, 12:28
DCLID_J0040 2.45 4298.35 01Jan2012, 12:29
DCLID_J0050 2.48 4284.88 01Jan2012, 12:33
DCLID_J0060 3.70 6183.07 01Jan2012, 12:33
DCLID_J0070 4.72 5957.56 01Jan2012, 13:17
DCLID_J0080 5.22 6311.43 01Jan2012, 12:48
DCLID_J0090 5.30 6246.84 01Jan2012, 12:57
DCLID_J0100 5.46 6160.26 01Jan2012, 13:18
DCLID_J0110 5.47 6031.56 01Jan2012, 13:55
DCLID_J0120 8.49 8175.45 01Jan2012, 12:59
DCLID_J0130 8.62 8190.25 01Jan2012, 13:02
DCLID_J0140 8.67 8158.06 01Jan2012, 13:13
DCLID_J0150 9.59 8481.75 01Jan2012, 13:12
DCLID_J0160 9.84 8449.57 01Jan2012, 13:34
DCLID_J0170 10.18 8513.14 01Jan2012, 13:34
DCLID_J0180 10.28 8520.14 01Jan2012, 13:36
DCLID_J0190 10.50 8502.30 01Jan2012, 13:49
DCLID_J0200 11.13 8598.86 01Jan2012, 13:48
DCLID_J0210 11.17 8574.08 01Jan2012, 13:58
DCLID_J0230 11.93 8709.75 01Jan2012, 13:57
DCLID_J0240 12.33 8714.96 01Jan2012, 14:08
DCLID_J0250 12.75 8724.03 01Jan2012, 14:19
DCLID_J0260 18.86 11949.63 01Jan2012, 14:11
DCLID_J0270 19.28 11916.61 01Jan2012, 14:33
DCLID_J0280 20.62 11914.20 01Jan2012, 14:59
DCLID_J0290 22.30 12527.93 01Jan2012, 15:21
DCLID_JOutlet 25.42 12917.05 01Jan2012, 16:20
Project: Denton2012Future Analysis: DCLID_010yr_1min Run: DCLID_010yr_1min
Start of Run: 01Jan2012, 00:00 Basin Model: DCLID_010yr_1min
End of Run: 02Jan2012, 00:00 Meteorologic Model: 10−Year
Compute Time: 13Oct2017, 12:44:34 Control Specifications: Control 1_1min
Analysis
Point
Drainage Area
(MI2)
Peak Discharge
(CFS)
Time of Peak
DCLID_J0020 1.57 3437.69 01Jan2012, 12:22
DCLID_J0030 1.64 3470.85 01Jan2012, 12:28
DCLID_J0040 2.45 4915.01 01Jan2012, 12:29
DCLID_J0050 2.48 4902.30 01Jan2012, 12:33
DCLID_J0060 3.70 7075.27 01Jan2012, 12:33
DCLID_J0070 4.72 6846.35 01Jan2012, 13:21
DCLID_J0080 5.22 7010.62 01Jan2012, 13:21
DCLID_J0090 5.30 6955.99 01Jan2012, 13:28
DCLID_J0100 5.46 6811.52 01Jan2012, 13:42
DCLID_J0110 5.47 6611.84 01Jan2012, 14:05
DCLID_J0120 8.49 9166.88 01Jan2012, 12:50
DCLID_J0130 8.62 9191.88 01Jan2012, 12:54
DCLID_J0140 8.67 9153.56 01Jan2012, 13:05
DCLID_J0150 9.59 9678.00 01Jan2012, 13:04
DCLID_J0160 9.84 9637.23 01Jan2012, 13:27
DCLID_J0170 10.18 9735.85 01Jan2012, 13:27
DCLID_J0180 10.28 9750.26 01Jan2012, 13:29
DCLID_J0190 10.50 9733.40 01Jan2012, 13:42
DCLID_J0200 11.13 9884.04 01Jan2012, 13:41
DCLID_J0210 11.17 9852.80 01Jan2012, 13:51
DCLID_J0230 11.93 10068.55 01Jan2012, 13:50
DCLID_J0240 12.33 10072.25 01Jan2012, 14:04
DCLID_J0250 12.75 10096.35 01Jan2012, 14:14
DCLID_J0260 18.86 14355.23 01Jan2012, 14:04
DCLID_J0270 19.28 14389.85 01Jan2012, 14:13
DCLID_J0280 20.62 14514.93 01Jan2012, 14:24
DCLID_J0290 22.30 15343.06 01Jan2012, 14:59
DCLID_JOutlet 25.42 16074.56 01Jan2012, 15:56
Project: Denton2012Future Analysis: 10yr_May31 Run: 10yr_May31
Start of Run: 01Jan2012, 00:00 Basin Model: 10−year_May31_Event
End of Run: 02Jan2012, 00:00 Meteorologic Model: 10−Year
Compute Time: 16Oct2017, 10:33:35 Control Specifications: Control 1_1min
Analysis
Point
Drainage Area
(MI2)
Peak Discharge
(CFS)
Time of Peak
DCLID_J0020 1.57 3477.69 01Jan2012, 12:22
DCLID_J0030 1.64 3510.85 01Jan2012, 12:28
DCLID_J0040 2.45 4955.01 01Jan2012, 12:29
DCLID_J0050 2.48 4942.31 01Jan2012, 12:33
DCLID_J0060 3.70 7115.28 01Jan2012, 12:33
DCLID_J0070 4.72 6884.70 01Jan2012, 13:22
DCLID_J0080 5.22 7048.22 01Jan2012, 13:21
DCLID_J0090 5.30 6994.28 01Jan2012, 13:28
DCLID_J0100 5.46 6847.93 01Jan2012, 13:42
DCLID_J0110 5.47 6636.11 01Jan2012, 14:06
DCLID_J0120 8.49 9170.79 01Jan2012, 12:50
DCLID_J0130 8.62 9196.75 01Jan2012, 12:54
DCLID_J0140 8.67 9160.39 01Jan2012, 13:05
DCLID_J0150 9.59 9686.74 01Jan2012, 13:04
DCLID_J0160 9.84 9647.81 01Jan2012, 13:27
DCLID_J0170 10.18 9746.57 01Jan2012, 13:27
DCLID_J0180 10.28 9761.62 01Jan2012, 13:28
DCLID_J0190 10.50 9745.08 01Jan2012, 13:42
DCLID_J0200 11.13 9897.06 01Jan2012, 13:41
DCLID_J0210 11.17 9865.91 01Jan2012, 13:50
DCLID_J0230 11.93 10082.39 01Jan2012, 13:50
DCLID_J0240 12.33 10082.17 01Jan2012, 14:04
DCLID_J0250 12.75 10107.04 01Jan2012, 14:15
DCLID_J0260 18.86 14381.81 01Jan2012, 14:03
DCLID_J0280 20.62 14542.98 01Jan2012, 14:23
DCLID_J0290 22.30 15372.50 01Jan2012, 14:59
DCLID_JOutlet 25.42 16107.50 01Jan2012, 15:56
DCLID_R0270 18.86 14370.30 01Jan2012, 14:13
Project: Denton2012Future Analysis: DCLID_025yr_1min Run: DCLID_025yr_1min
Start of Run: 01Jan2012, 00:00 Basin Model: DCLID_025yr_1min
End of Run: 02Jan2012, 00:00 Meteorologic Model: 25−Year
Compute Time: 13Oct2017, 12:48:23 Control Specifications: Control 1_1min
Analysis
Point
Drainage Area
(MI2)
Peak Discharge
(CFS)
Time of Peak
DCLID_J0020 1.57 4030.85 01Jan2012, 12:22
DCLID_J0030 1.64 4083.89 01Jan2012, 12:28
DCLID_J0040 2.45 5780.81 01Jan2012, 12:29
DCLID_J0050 2.48 5626.08 01Jan2012, 12:38
DCLID_J0060 3.70 8118.46 01Jan2012, 12:36
DCLID_J0070 4.72 7913.70 01Jan2012, 13:26
DCLID_J0080 5.22 8100.46 01Jan2012, 13:25
DCLID_J0090 5.30 8034.12 01Jan2012, 13:33
DCLID_J0100 5.46 7925.91 01Jan2012, 13:48
DCLID_J0110 5.47 7557.07 01Jan2012, 14:16
DCLID_J0120 8.49 9983.74 01Jan2012, 12:49
DCLID_J0130 8.62 10039.28 01Jan2012, 12:52
DCLID_J0140 8.67 10023.33 01Jan2012, 13:05
DCLID_J0150 9.59 10692.62 01Jan2012, 13:01
DCLID_J0160 9.84 10644.72 01Jan2012, 13:30
DCLID_J0170 10.18 10755.75 01Jan2012, 13:30
DCLID_J0180 10.28 10776.10 01Jan2012, 13:32
DCLID_J0190 10.50 10786.16 01Jan2012, 13:45
DCLID_J0200 11.13 10958.11 01Jan2012, 13:44
DCLID_J0210 11.17 10935.52 01Jan2012, 13:55
DCLID_J0230 11.93 11178.58 01Jan2012, 13:53
DCLID_J0240 12.33 11200.15 01Jan2012, 14:10
DCLID_J0250 12.75 11236.64 01Jan2012, 14:24
DCLID_J0260 18.86 16490.24 01Jan2012, 13:42
DCLID_J0270 19.28 16559.40 01Jan2012, 13:50
DCLID_J0280 20.62 16794.57 01Jan2012, 14:02
DCLID_J0290 22.30 17542.76 01Jan2012, 14:54
DCLID_JOutlet 25.42 18542.97 01Jan2012, 15:51
Project: Denton2012Future Analysis: DCLID_050yr_1min Run: DCLID_050yr_1min
Start of Run: 01Jan2012, 00:00 Basin Model: DCLID_050yr_1min
End of Run: 02Jan2012, 00:00 Meteorologic Model: 50−Year
Compute Time: 13Oct2017, 12:46:40 Control Specifications: Control 1_1min
Analysis
Point
Drainage Area
(MI2)
Peak Discharge
(CFS)
Time of Peak
DCLID_J0020 1.57 4496.61 01Jan2012, 12:22
DCLID_J0030 1.64 4559.11 01Jan2012, 12:28
DCLID_J0040 2.45 6461.81 01Jan2012, 12:29
DCLID_J0050 2.48 6276.35 01Jan2012, 12:39
DCLID_J0060 3.70 9051.69 01Jan2012, 12:37
DCLID_J0070 4.72 8320.99 01Jan2012, 13:38
DCLID_J0080 5.22 8496.67 01Jan2012, 13:37
DCLID_J0090 5.30 8471.01 01Jan2012, 13:43
DCLID_J0100 5.46 8442.23 01Jan2012, 13:55
DCLID_J0110 5.47 8188.97 01Jan2012, 14:22
DCLID_J0120 8.49 10798.16 01Jan2012, 13:25
DCLID_J0130 8.62 10830.40 01Jan2012, 13:28
DCLID_J0140 8.67 10811.03 01Jan2012, 13:42
DCLID_J0150 9.59 11395.64 01Jan2012, 13:05
DCLID_J0160 9.84 11416.16 01Jan2012, 13:34
DCLID_J0170 10.18 11538.26 01Jan2012, 13:33
DCLID_J0180 10.28 11563.39 01Jan2012, 13:35
DCLID_J0190 10.50 11598.40 01Jan2012, 13:48
DCLID_J0200 11.13 11790.59 01Jan2012, 13:46
DCLID_J0210 11.17 11780.13 01Jan2012, 13:57
DCLID_J0230 11.93 12052.18 01Jan2012, 13:55
DCLID_J0240 12.33 12099.39 01Jan2012, 14:12
DCLID_J0250 12.75 12174.60 01Jan2012, 14:19
DCLID_J0260 18.86 18135.20 01Jan2012, 13:45
DCLID_J0270 19.28 18229.17 01Jan2012, 13:53
DCLID_J0280 20.62 18522.75 01Jan2012, 14:02
DCLID_J0290 22.30 19358.01 01Jan2012, 14:51
DCLID_JOutlet 25.42 20595.30 01Jan2012, 15:45
Project: Denton2012Future Analysis: DCLID_100yr_1min Run: DCLID_100yr_1min
Start of Run: 01Jan2012, 00:00 Basin Model: DCLID_100yr_1min
End of Run: 02Jan2012, 00:00 Meteorologic Model: 100−Year
Compute Time: 13Oct2017, 12:49:48 Control Specifications: Control 1_1min
Analysis
Point
Drainage Area
(MI2)
Peak Discharge
(CFS)
Time of Peak
DCLID_J0020 1.57 4965.81 01Jan2012, 12:22
DCLID_J0030 1.64 5038.04 01Jan2012, 12:28
DCLID_J0040 2.45 7148.63 01Jan2012, 12:29
DCLID_J0050 2.48 6943.16 01Jan2012, 12:39
DCLID_J0060 3.70 10008.21 01Jan2012, 12:37
DCLID_J0070 4.72 9046.85 01Jan2012, 13:44
DCLID_J0080 5.22 9224.63 01Jan2012, 13:44
DCLID_J0090 5.30 9142.29 01Jan2012, 13:51
DCLID_J0100 5.46 9026.51 01Jan2012, 14:03
DCLID_J0110 5.47 8746.10 01Jan2012, 14:29
DCLID_J0120 8.49 11899.42 01Jan2012, 13:22
DCLID_J0130 8.62 11938.16 01Jan2012, 13:26
DCLID_J0140 8.67 11914.80 01Jan2012, 13:40
DCLID_J0150 9.59 12291.43 01Jan2012, 13:38
DCLID_J0160 9.84 12301.05 01Jan2012, 14:08
DCLID_J0170 10.18 12389.63 01Jan2012, 13:45
DCLID_J0180 10.28 12415.89 01Jan2012, 13:46
DCLID_J0190 10.50 12476.31 01Jan2012, 13:54
DCLID_J0200 11.13 12683.34 01Jan2012, 13:49
DCLID_J0210 11.17 12690.03 01Jan2012, 13:58
DCLID_J0230 11.93 13027.76 01Jan2012, 13:49
DCLID_J0240 12.33 13106.63 01Jan2012, 14:08
DCLID_J0250 12.75 13206.32 01Jan2012, 14:15
DCLID_J0260 18.86 20236.58 01Jan2012, 13:46
DCLID_J0270 19.28 20285.19 01Jan2012, 13:57
DCLID_J0280 20.62 20572.12 01Jan2012, 14:10
DCLID_J0290 22.30 21378.91 01Jan2012, 14:59
DCLID_JOutlet 25.42 22723.30 01Jan2012, 15:51
Project: Denton2012Future Analysis: DCLID_500yr_1min Run: DCLID_500yr_1min
Start of Run: 01Jan2012, 00:00 Basin Model: DCLID_500yr_1min
End of Run: 02Jan2012, 00:00 Meteorologic Model: 500−Year
Compute Time: 13Oct2017, 12:51:09 Control Specifications: Control 1_1min
Analysis
Point
Drainage Area
(MI2)
Peak Discharge
(CFS)
Time of Peak
DCLID_J0020 1.57 6314.15 01Jan2012, 12:22
DCLID_J0030 1.64 6234.94 01Jan2012, 12:33
DCLID_J0040 2.45 8923.80 01Jan2012, 12:33
DCLID_J0050 2.48 8692.04 01Jan2012, 12:42
DCLID_J0060 3.70 12358.64 01Jan2012, 12:39
DCLID_J0070 4.72 10925.02 01Jan2012, 13:54
DCLID_J0080 5.22 11124.42 01Jan2012, 13:54
DCLID_J0090 5.30 11028.63 01Jan2012, 14:02
DCLID_J0100 5.46 10895.40 01Jan2012, 14:15
DCLID_J0110 5.47 10415.46 01Jan2012, 14:42
DCLID_J0120 8.49 14351.12 01Jan2012, 13:20
DCLID_J0130 8.62 14393.12 01Jan2012, 13:23
DCLID_J0140 8.67 14323.82 01Jan2012, 13:40
DCLID_J0150 9.59 14796.85 01Jan2012, 13:39
DCLID_J0160 9.84 14776.39 01Jan2012, 14:11
DCLID_J0170 10.18 14888.50 01Jan2012, 14:11
DCLID_J0180 10.28 14916.00 01Jan2012, 14:12
DCLID_J0190 10.50 14972.53 01Jan2012, 14:20
DCLID_J0200 11.13 15172.06 01Jan2012, 14:20
DCLID_J0210 11.17 15178.15 01Jan2012, 14:25
DCLID_J0230 11.93 15446.40 01Jan2012, 14:24
DCLID_J0240 12.33 15524.68 01Jan2012, 14:40
DCLID_J0250 12.75 15627.71 01Jan2012, 14:46
DCLID_J0260 18.86 24818.60 01Jan2012, 13:37
DCLID_J0270 19.28 24961.96 01Jan2012, 13:47
DCLID_J0280 20.62 25412.67 01Jan2012, 14:01
DCLID_J0290 22.30 26074.72 01Jan2012, 14:57
DCLID_JOutlet 25.42 27869.12 01Jan2012, 15:50
APPENDIX E: HEC-RAS OUTPUT
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 57800 2-year 3200.00 496.96 500.58 501.68 0.008765 8.40 381.08 122.80 0.84
Reach1 57800 5-year 4300.00 496.96 501.19 502.56 0.009003 9.39 457.82 127.05 0.87
Reach1 57800 10-year 4900.00 496.96 501.52 501.18 503.01 0.009022 9.80 499.79 130.17 0.88
Reach1 57800 25-year 5800.00 496.96 501.98 501.63 503.64 0.009088 10.34 561.17 135.74 0.90
Reach1 57800 50-year 6500.00 496.96 502.33 501.98 504.10 0.009069 10.67 609.12 140.22 0.90
Reach1 57800 100-year 13000.00 496.96 505.14 504.52 507.55 0.007578 12.46 1043.57 166.14 0.88
Reach1 57800 OLD 500-year 36200.00 496.96 512.99 516.05 0.004336 14.04 2578.48 224.52 0.73
Reach1 57800 NEW 500-year 55500.00 496.96 518.11 521.38 0.003373 14.51 3825.95 262.14 0.67
Reach1 57677 2-year 3200.00 495.10 498.53 498.53 499.91 0.026416 9.43 339.46 122.95 1.00
Reach1 57677 5-year 4300.00 495.10 499.15 499.15 500.81 0.024982 10.34 416.00 125.44 1.00
Reach1 57677 10-year 4900.00 495.10 499.44 499.44 501.26 0.024707 10.81 453.40 126.64 1.01
Reach1 57677 25-year 5800.00 495.10 499.89 499.89 501.90 0.023902 11.37 509.98 128.43 1.01
Reach1 57677 50-year 6500.00 495.10 500.22 500.22 502.37 0.023375 11.77 552.34 129.75 1.01
Reach1 57677 100-year 13000.00 495.10 502.82 502.82 506.03 0.020468 14.36 905.15 141.22 1.00
Reach1 57677 OLD 500-year 36200.00 495.10 509.24 509.24 514.85 0.017490 18.99 1906.66 170.80 1.00
Reach1 57677 NEW 500-year 55500.00 495.10 513.14 513.14 520.22 0.016378 21.34 2601.04 184.18 1.00
Reach1 57489 2-year 3200.00 485.08 491.20 490.67 492.44 0.015744 8.95 357.47 94.76 0.81
Reach1 57489 5-year 4300.00 485.08 492.01 491.44 493.52 0.015468 9.85 436.52 98.63 0.83
Reach1 57489 10-year 4900.00 485.08 492.38 491.82 494.05 0.015788 10.37 472.72 100.35 0.84
Reach1 57489 25-year 5800.00 485.08 492.86 492.34 494.78 0.016416 11.11 522.00 102.64 0.87
Reach1 57489 50-year 6500.00 485.08 493.21 492.74 495.32 0.016852 11.64 558.38 104.31 0.89
Reach1 57489 100-year 13000.00 485.08 496.83 495.89 499.63 0.014125 13.41 969.24 126.04 0.85
Reach1 57489 OLD 500-year 36200.00 485.08 504.69 509.17 0.011330 16.99 2131.17 159.68 0.82
Reach1 57489 NEW 500-year 55500.00 485.08 508.65 507.00 514.84 0.012016 19.96 2780.63 168.05 0.87
Reach1 57269 2-year 3200.00 482.53 488.02 489.12 0.014131 8.44 379.12 100.78 0.77
Reach1 57269 5-year 4300.00 482.53 488.68 490.12 0.015247 9.62 446.99 103.03 0.81
Reach1 57269 10-year 4900.00 482.53 489.12 490.66 0.014664 9.95 492.41 104.55 0.81
Reach1 57269 25-year 5800.00 482.53 489.83 491.45 0.013265 10.22 567.47 107.01 0.78
Reach1 57269 50-year 6500.00 482.53 490.41 492.06 0.012097 10.32 629.97 109.02 0.76
Reach1 57269 100-year 13000.00 482.53 495.24 496.99 0.008175 10.63 1222.96 149.56 0.66
Reach1 57269 OLD 500-year 36200.00 482.53 504.35 506.84 0.005789 12.64 2863.41 206.20 0.60
Reach1 57269 NEW 500-year 55500.00 482.53 508.97 512.18 0.005720 14.38 3860.31 225.71 0.61
Reach1 57091 2-year 3200.00 480.47 486.69 487.27 0.006850 6.14 521.11 153.34 0.59
Reach1 57091 5-year 4300.00 480.47 487.99 488.54 0.004339 5.93 725.24 159.23 0.49
Reach1 57091 10-year 4900.00 480.47 488.67 489.20 0.003643 5.88 833.35 162.26 0.46
Reach1 57091 25-year 5800.00 480.47 489.61 490.15 0.002997 5.87 988.73 166.52 0.42
Reach1 57091 50-year 6500.00 480.47 490.31 490.85 0.002669 5.87 1106.47 170.27 0.41
Reach1 57091 100-year 13000.00 480.47 495.45 496.05 0.001808 6.20 2097.65 221.82 0.36
Reach1 57091 OLD 500-year 36200.00 480.47 504.97 505.91 0.001481 7.79 4647.59 298.77 0.35
Reach1 57091 NEW 500-year 55500.00 480.47 509.87 511.13 0.001501 9.00 6166.58 320.80 0.36
Reach1 56923 2-year 3200.00 478.24 486.26 486.55 0.002413 4.30 744.65 145.46 0.33
Reach1 56923 5-year 4300.00 478.24 487.67 487.99 0.002065 4.50 956.36 154.99 0.32
Reach1 56923 10-year 4900.00 478.24 488.38 488.71 0.001940 4.59 1067.74 160.00 0.31
Reach1 56923 25-year 5800.00 478.24 489.36 489.71 0.001800 4.72 1228.14 166.45 0.31
Reach1 56923 50-year 6500.00 478.24 490.08 490.44 0.001696 4.82 1349.42 169.59 0.30
Reach1 56923 100-year 13000.00 478.24 495.27 495.73 0.001558 5.42 2396.42 236.16 0.30
Reach1 56923 OLD 500-year 36200.00 478.24 504.83 505.62 0.001463 7.14 5068.97 313.87 0.31
Reach1 56923 NEW 500-year 55500.00 478.24 509.75 510.80 0.001639 8.22 6750.38 368.78 0.34
Reach1 56732 2-year 3200.00 477.10 485.92 486.16 0.001599 3.91 818.07 133.67 0.28
Reach1 56732 5-year 4300.00 477.10 487.36 487.64 0.001489 4.24 1013.96 138.42 0.28
Reach1 56732 10-year 4900.00 477.10 488.08 488.38 0.001450 4.40 1113.85 140.79 0.28
Reach1 56732 25-year 5800.00 477.10 489.07 489.40 0.001415 4.62 1254.57 144.05 0.28
Reach1 56732 50-year 6500.00 477.10 489.79 490.15 0.001392 4.78 1360.11 146.45 0.28
Reach1 56732 100-year 13000.00 477.10 494.86 495.43 0.001438 6.06 2144.45 163.59 0.30
Reach1 56732 OLD 500-year 36200.00 477.10 503.81 505.20 0.002483 9.45 3829.09 225.86 0.40
Reach1 56732 NEW 500-year 55500.00 477.10 508.35 510.29 0.003153 11.19 4959.81 273.05 0.46
Reach1 56550 2-year 3200.00 477.10 485.77 485.93 0.000859 3.17 1009.06 167.27 0.23
Reach1 56550 5-year 4300.00 477.10 487.24 487.42 0.000776 3.42 1258.28 171.99 0.22
Reach1 56550 10-year 4900.00 477.10 487.97 488.16 0.000749 3.54 1384.20 174.33 0.22
Reach1 56550 25-year 5800.00 477.10 488.97 489.18 0.000723 3.72 1560.43 177.55 0.22
Reach1 56550 50-year 6500.00 477.10 489.70 489.93 0.000708 3.84 1691.93 179.92 0.22
Reach1 56550 100-year 13000.00 477.10 494.82 495.19 0.000737 4.89 2658.18 200.95 0.24
Reach1 56550 OLD 500-year 36200.00 477.10 503.84 504.76 0.001161 7.71 4694.76 250.70 0.31
Reach1 56550 NEW 500-year 55500.00 477.10 508.37 509.77 0.001329 9.50 5944.03 301.47 0.35
Reach1 56305 2-year 3200.00 477.10 485.45 485.68 0.001165 3.81 839.40 130.85 0.27
Reach1 56305 5-year 4300.00 477.10 486.92 487.19 0.001101 4.16 1034.77 135.14 0.26
Reach1 56305 10-year 4900.00 477.10 487.64 487.93 0.001082 4.32 1133.30 137.25 0.27
Reach1 56305 25-year 5800.00 477.10 488.64 488.96 0.001070 4.56 1271.00 140.29 0.27
Reach1 56305 50-year 6500.00 477.10 489.36 489.71 0.001061 4.73 1374.03 142.52 0.27
Reach1 56305 100-year 13000.00 477.10 494.39 494.94 0.001268 5.96 2182.26 183.27 0.30
Reach1 56305 OLD 500-year 36200.00 477.10 503.22 504.40 0.001675 8.73 4214.10 297.70 0.37
Reach1 56305 NEW 500-year 55500.00 477.10 507.66 509.37 0.001790 10.53 5727.90 375.08 0.40
Reach1 56061 2-year 3200.00 477.10 484.93 485.30 0.001926 4.90 653.28 101.09 0.34
Reach1 56061 5-year 4300.00 477.10 486.38 486.83 0.001877 5.35 803.72 106.15 0.34
Reach1 56061 10-year 4900.00 477.10 487.09 487.57 0.001867 5.57 880.18 108.85 0.35
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 56061 25-year 5800.00 477.10 488.06 488.60 0.001881 5.87 987.69 113.11 0.35
Reach1 56061 50-year 6500.00 477.10 488.78 489.35 0.001908 6.07 1070.04 117.68 0.36
Reach1 56061 100-year 13000.00 477.10 493.61 494.51 0.002166 7.60 1710.82 147.56 0.39
Reach1 56061 OLD 500-year 36200.00 477.10 501.60 503.77 0.002891 11.91 3404.54 273.70 0.49
Reach1 56061 NEW 500-year 55500.00 477.10 505.20 508.59 0.003620 15.01 4448.08 305.64 0.56
Reach1 55744 2-year 3200.00 473.02 481.23 481.23 483.68 0.019069 12.57 254.50 52.01 1.00
Reach1 55744 5-year 4300.00 473.02 482.44 482.44 485.22 0.018393 13.38 321.48 58.25 1.00
Reach1 55744 10-year 4900.00 473.02 483.01 483.01 485.96 0.018251 13.79 355.40 61.16 1.01
Reach1 55744 25-year 5800.00 473.02 483.85 483.85 486.98 0.017597 14.19 408.60 65.47 1.00
Reach1 55744 50-year 6500.00 473.02 484.42 484.42 487.71 0.017385 14.55 446.88 68.39 1.00
Reach1 55744 100-year 13000.00 473.02 488.68 488.68 492.72 0.015992 16.13 806.17 100.09 1.00
Reach1 55744 OLD 500-year 36200.00 473.02 496.74 496.74 501.77 0.013499 18.07 2161.85 294.84 0.97
Reach1 55744 NEW 500-year 55500.00 473.02 500.26 500.26 506.43 0.011644 20.28 3381.36 386.18 0.95
Reach1 55522 2-year 3200.00 473.02 480.19 480.42 0.001899 3.83 836.25 190.82 0.32
Reach1 55522 5-year 4300.00 473.02 481.34 481.60 0.001624 4.07 1057.76 195.50 0.31
Reach1 55522 10-year 4900.00 473.02 481.91 482.18 0.001537 4.19 1168.86 197.80 0.30
Reach1 55522 25-year 5800.00 473.02 482.69 482.99 0.001452 4.38 1325.03 200.99 0.30
Reach1 55522 50-year 6500.00 473.02 483.25 483.57 0.001408 4.52 1438.92 203.29 0.30
Reach1 55522 100-year 13000.00 473.02 487.16 487.67 0.001386 5.74 2264.92 219.23 0.31
Reach1 55522 OLD 500-year 36200.00 473.02 495.34 496.25 0.001313 7.93 5068.95 570.55 0.33
Reach1 55522 NEW 500-year 55500.00 473.02 497.39 498.77 0.001800 10.00 6305.40 633.47 0.40
Reach1 55373 2-year 3200.00 473.02 479.17 477.32 479.92 0.005508 6.95 460.30 94.39 0.56
Reach1 55373 5-year 4300.00 473.02 480.22 478.17 481.12 0.005622 7.64 562.93 101.61 0.57
Reach1 55373 10-year 4900.00 473.02 480.73 478.60 481.71 0.005670 7.96 615.75 105.14 0.58
Reach1 55373 25-year 5800.00 473.02 481.43 479.19 482.52 0.005759 8.39 691.35 110.24 0.59
Reach1 55373 50-year 6500.00 473.02 481.93 479.63 483.11 0.005835 8.69 747.63 114.08 0.60
Reach1 55373 100-year 13000.00 473.02 485.17 482.89 487.13 0.007088 11.23 1157.37 138.86 0.69
Reach1 55373 OLD 500-year 36200.00 473.02 490.28 490.28 495.39 0.012190 18.20 2017.04 211.91 0.95
Reach1 55373 NEW 500-year 55500.00 473.02 495.30 495.30 498.21 0.005118 15.03 4531.84 717.04 0.65
Reach1 55149 2-year 3200.00 471.23 478.24 475.88 478.83 0.003984 6.17 519.03 99.43 0.48
Reach1 55149 5-year 4300.00 471.23 479.23 476.70 479.98 0.004287 6.92 621.03 105.38 0.50
Reach1 55149 10-year 4900.00 471.23 479.72 477.11 480.55 0.004419 7.28 673.17 108.30 0.51
Reach1 55149 25-year 5800.00 471.23 480.39 477.67 481.33 0.004608 7.77 746.60 112.28 0.53
Reach1 55149 50-year 6500.00 471.23 480.86 478.10 481.88 0.004755 8.12 800.06 115.09 0.54
Reach1 55149 100-year 13000.00 471.23 483.11 481.31 485.38 0.008299 12.10 1076.47 140.98 0.74
Reach1 55149 OLD 500-year 36200.00 471.23 488.49 488.49 490.96 0.006053 14.09 3153.69 1017.23 0.68
Reach1 55149 NEW 500-year 55500.00 471.23 490.07 490.07 492.08 0.005066 13.88 5449.75 1145.55 0.63
Reach1 54941 2-year 3200.00 471.23 477.80 474.78 478.15 0.002209 4.75 673.47 121.36 0.36
Reach1 54941 5-year 4300.00 471.23 478.78 475.45 479.24 0.002416 5.41 794.18 125.30 0.38
Reach1 54941 10-year 4900.00 471.23 479.26 475.79 479.77 0.002511 5.73 854.91 127.23 0.39
Reach1 54941 25-year 5800.00 471.23 479.92 476.27 480.51 0.002654 6.18 938.93 129.85 0.40
Reach1 54941 50-year 6500.00 471.23 480.38 476.63 481.03 0.002763 6.50 1004.54 157.86 0.42
Reach1 54941 100-year 13000.00 471.23 483.15 479.40 483.99 0.002935 7.86 1912.47 536.15 0.44
Reach1 54941 OLD 500-year 36200.00 471.23 485.29 485.29 487.87 0.007453 14.29 2988.18 1087.43 0.73
Reach1 54941 NEW 500-year 55500.00 471.23 487.81 486.73 488.99 0.003339 10.87 6830.49 1407.89 0.51
Reach1 54709 2-year 3200.00 471.23 476.92 474.84 477.46 0.004043 5.91 541.79 233.98 0.48
Reach1 54709 5-year 4300.00 471.23 477.77 475.55 478.47 0.004430 6.71 640.49 251.36 0.51
Reach1 54709 10-year 4900.00 471.23 478.20 475.91 478.98 0.004596 7.09 690.84 259.97 0.52
Reach1 54709 25-year 5800.00 471.23 478.76 476.42 479.66 0.004875 7.64 759.19 317.34 0.54
Reach1 54709 50-year 6500.00 471.23 479.14 476.80 480.15 0.005124 8.06 807.01 384.76 0.56
Reach1 54709 100-year 13000.00 471.23 481.28 481.02 482.92 0.006594 10.73 1403.23 1174.03 0.66
Reach1 54709 OLD 500-year 36200.00 471.23 485.99 483.13 486.19 0.000529 4.11 10214.86 1742.50 0.20
Reach1 54709 NEW 500-year 55500.00 471.23 488.23 483.14 488.47 0.000449 4.22 14169.14 1782.37 0.19
Reach1 54494 2-year 3200.00 471.23 475.73 474.42 476.37 0.006306 6.44 496.95 1277.09 0.58
Reach1 54494 5-year 4300.00 471.23 476.54 475.07 477.33 0.006347 7.14 602.24 1378.29 0.59
Reach1 54494 10-year 4900.00 471.23 476.96 475.39 477.82 0.006295 7.44 658.52 1462.43 0.60
Reach1 54494 25-year 5800.00 471.23 477.47 475.84 478.45 0.006470 7.94 734.75 1574.71 0.61
Reach1 54494 50-year 6500.00 471.23 477.83 476.18 478.89 0.006600 8.29 797.00 1645.21 0.62
Reach1 54494 100-year 13000.00 471.23 480.26 479.49 481.49 0.005624 9.47 1552.82 2177.91 0.60
Reach1 54494 OLD 500-year 36200.00 471.23 483.08 483.08 485.66 0.008104 13.99 2899.87 2408.53 0.76
Reach1 54494 NEW 500-year 55500.00 471.23 488.34 484.79 488.39 0.000047 1.40 31153.59 2531.15 0.06
Reach1 54287 2-year 3200.00 469.19 475.00 472.36 475.38 0.003236 4.96 645.75 645.69 0.39
Reach1 54287 5-year 4300.00 469.19 475.70 473.02 476.23 0.003932 5.85 735.21 1165.95 0.43
Reach1 54287 10-year 4900.00 469.19 476.07 473.35 476.68 0.004298 6.26 783.22 1456.80 0.46
Reach1 54287 25-year 5800.00 469.19 476.45 473.83 477.20 0.005102 6.93 841.76 1677.27 0.50
Reach1 54287 50-year 6500.00 469.19 476.72 474.18 477.57 0.005672 7.41 888.92 1827.24 0.53
Reach1 54287 100-year 13000.00 469.19 478.33 477.85 479.96 0.009606 10.57 1307.10 2393.60 0.70
Reach1 54287 OLD 500-year 36200.00 469.19 484.32 479.32 484.39 0.000130 1.83 17548.16 3101.51 0.09
Reach1 54287 NEW 500-year 55500.00 469.19 488.34 479.32 488.37 0.000045 1.28 36505.43 3112.30 0.06
Reach1 54036 2-year 3200.00 469.19 474.07 473.09 474.37 0.005213 4.76 733.89 1117.16 0.46
Reach1 54036 5-year 4300.00 469.19 473.67 473.55 474.49 0.015553 7.85 604.14 896.06 0.79
Reach1 54036 10-year 4900.00 469.19 473.76 473.76 474.73 0.018011 8.54 631.80 942.56 0.85
Reach1 54036 25-year 5800.00 469.19 474.06 474.06 475.07 0.017372 8.69 729.95 1112.18 0.84
Reach1 54036 50-year 6500.00 469.19 474.24 474.24 475.30 0.017285 8.86 796.51 1219.97 0.84
Reach1 54036 100-year 13000.00 469.19 475.68 475.59 476.99 0.015043 9.08 1413.61 1861.19 0.80
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 54036 OLD 500-year 36200.00 469.19 484.34 477.07 484.35 0.000037 0.90 36123.96 4281.98 0.05
Reach1 54036 NEW 500-year 55500.00 469.19 488.34 477.08 488.36 0.000025 0.91 53273.18 4281.98 0.04
Reach1 53820 2-year 3200.00 464.37 470.61 470.53 472.23 0.022275 10.21 315.28 201.37 0.96
Reach1 53820 5-year 4300.00 464.37 472.44 471.94 472.78 0.004371 5.60 1098.94 896.02 0.45
Reach1 53820 10-year 4900.00 464.37 473.18 472.11 473.35 0.002122 4.16 1644.66 1352.93 0.32
Reach1 53820 25-year 5800.00 464.37 473.90 472.32 474.01 0.001284 3.42 2231.62 1806.16 0.25
Reach1 53820 50-year 6500.00 464.37 474.31 472.47 474.42 0.001062 3.20 2615.59 1910.76 0.23
Reach1 53820 100-year 13000.00 464.37 476.02 473.40 476.14 0.000932 3.34 4875.21 2932.10 0.22
Reach1 53820 OLD 500-year 36200.00 464.37 484.33 475.46 484.35 0.000028 0.96 41310.65 4137.57 0.04
Reach1 53820 NEW 500-year 55500.00 464.37 488.34 476.57 488.35 0.000022 0.99 57885.68 4137.57 0.04
Reach1 53628 2-year 3200.00 462.83 470.49 467.93 470.75 0.002484 4.24 845.56 367.13 0.34
Reach1 53628 5-year 4300.00 462.83 472.33 468.61 472.42 0.000744 2.81 2085.57 1077.08 0.19
Reach1 53628 10-year 4900.00 462.83 473.12 468.96 473.17 0.000391 2.18 3026.12 1309.64 0.14
Reach1 53628 25-year 5800.00 462.83 473.86 469.49 473.90 0.000251 1.85 4130.11 1912.76 0.12
Reach1 53628 50-year 6500.00 462.83 474.29 470.11 474.32 0.000207 1.73 4916.45 2329.73 0.11
Reach1 53628 100-year 13000.00 462.83 476.01 472.30 476.05 0.000185 1.82 9028.58 3635.27 0.10
Reach1 53628 OLD 500-year 36200.00 462.83 484.33 474.06 484.34 0.000018 0.85 44520.40 4179.62 0.04
Reach1 53628 NEW 500-year 55500.00 462.83 488.34 474.96 488.35 0.000015 0.89 61266.43 4179.62 0.03
Reach1 53438 2-year 3200.00 460.52 470.48 467.84 470.52 0.000440 1.87 1891.99 849.15 0.14
Reach1 53438 5-year 4300.00 460.52 472.33 468.45 472.35 0.000134 1.17 3626.37 1065.42 0.08
Reach1 53438 10-year 4900.00 460.52 473.11 468.67 473.12 0.000096 1.04 4611.25 1584.75 0.07
Reach1 53438 25-year 5800.00 460.52 473.85 468.86 473.87 0.000080 0.99 5805.68 1880.99 0.06
Reach1 53438 50-year 6500.00 460.52 474.28 469.07 474.29 0.000074 0.97 6559.92 2136.15 0.06
Reach1 53438 100-year 13000.00 460.52 476.00 470.04 476.02 0.000093 1.25 10510.30 3502.08 0.07
Reach1 53438 OLD 500-year 36200.00 460.52 484.33 472.17 484.34 0.000015 0.76 45935.01 4364.29 0.03
Reach1 53438 NEW 500-year 55500.00 460.52 488.34 473.63 488.35 0.000012 0.79 63424.67 4364.29 0.03
Reach1 53261 2-year 3200.00 459.85 470.42 464.86 470.47 0.000173 1.22 2035.26 818.68 0.09
Reach1 53261 5-year 4300.00 459.85 472.30 465.41 472.33 0.000091 1.03 3957.03 1596.25 0.07
Reach1 53261 10-year 4900.00 459.85 473.09 465.69 473.11 0.000071 0.95 5151.16 1991.50 0.06
Reach1 53261 25-year 5800.00 459.85 473.84 466.07 473.85 0.000058 0.90 6587.44 2541.49 0.06
Reach1 53261 50-year 6500.00 459.85 474.27 466.38 474.28 0.000056 0.91 7582.30 2946.31 0.05
Reach1 53261 100-year 13000.00 459.85 475.98 468.54 476.01 0.000068 1.11 12275.42 4003.47 0.06
Reach1 53261 OLD 500-year 36200.00 459.85 484.33 472.86 484.34 0.000010 0.62 51306.89 4461.11 0.03
Reach1 53261 NEW 500-year 55500.00 459.85 488.34 474.24 488.35 0.000008 0.66 69185.38 4461.11 0.02
Reach1 53068 2-year 3200.00 459.02 470.34 464.76 470.42 0.000489 2.42 1591.06 694.10 0.16
Reach1 53068 5-year 4300.00 459.02 472.27 465.42 472.30 0.000218 1.80 3285.41 1348.49 0.11
Reach1 53068 10-year 4900.00 459.02 473.07 465.76 473.09 0.000157 1.58 4422.87 1873.16 0.09
Reach1 53068 25-year 5800.00 459.02 473.82 466.22 473.84 0.000114 1.40 5820.05 2477.05 0.08
Reach1 53068 50-year 6500.00 459.02 474.25 466.55 474.27 0.000099 1.33 6781.98 2927.16 0.07
Reach1 53068 100-year 13000.00 459.02 475.97 469.82 475.99 0.000101 1.46 11187.30 3633.30 0.08
Reach1 53068 OLD 500-year 36200.00 459.02 484.32 473.25 484.33 0.000015 0.81 47892.98 4269.34 0.03
Reach1 53068 NEW 500-year 55500.00 459.02 488.33 474.20 488.34 0.000013 0.86 65032.79 4284.77 0.03
Reach1 52878 2-year 3200.00 457.02 470.36 470.37 0.000067 0.86 3836.78 907.06 0.05
Reach1 52878 5-year 4300.00 457.02 472.27 472.28 0.000044 0.77 6141.27 1483.18 0.04
Reach1 52878 10-year 4900.00 457.02 473.07 473.07 0.000036 0.73 7454.51 1892.80 0.04
Reach1 52878 25-year 5800.00 457.02 473.82 473.83 0.000034 0.72 8987.98 2139.34 0.04
Reach1 52878 50-year 6500.00 457.02 474.25 474.26 0.000033 0.73 9936.56 2286.49 0.04
Reach1 52878 100-year 13000.00 457.02 475.96 475.98 0.000053 1.01 14429.86 2886.57 0.05
Reach1 52878 OLD 500-year 36200.00 457.02 484.32 484.33 0.000016 0.77 41639.78 3588.58 0.03
Reach1 52878 NEW 500-year 55500.00 457.02 488.33 488.34 0.000015 0.84 55475.38 3607.60 0.03
Reach1 52612 2-year 3200.00 454.98 470.31 470.35 0.000131 1.64 2168.32 399.09 0.09
Reach1 52612 5-year 4300.00 454.98 472.23 472.26 0.000109 1.61 3563.06 1183.35 0.08
Reach1 52612 10-year 4900.00 454.98 473.03 473.06 0.000091 1.54 4647.81 1566.12 0.07
Reach1 52612 25-year 5800.00 454.98 473.79 473.81 0.000075 1.45 5923.65 1747.23 0.07
Reach1 52612 50-year 6500.00 454.98 474.23 474.25 0.000070 1.43 6713.75 1888.41 0.07
Reach1 52612 100-year 13000.00 454.98 475.93 475.96 0.000097 1.81 10244.25 2234.36 0.08
Reach1 52612 OLD 500-year 36200.00 454.98 484.31 484.33 0.000024 1.19 33913.73 3311.75 0.04
Reach1 52612 NEW 500-year 55500.00 454.98 488.31 488.34 0.000021 1.23 46293.93 3330.47 0.04
Reach1 52286 2-year 3200.00 454.98 470.26 470.30 0.000176 1.74 2087.10 293.50 0.10
Reach1 52286 5-year 4300.00 454.98 472.18 472.22 0.000186 1.82 3012.53 767.53 0.10
Reach1 52286 10-year 4900.00 454.98 472.99 473.02 0.000170 1.80 3838.22 1318.55 0.10
Reach1 52286 25-year 5800.00 454.98 473.75 473.78 0.000152 1.79 4985.28 1665.97 0.09
Reach1 52286 50-year 6500.00 454.98 474.19 474.22 0.000142 1.77 5740.77 1757.72 0.09
Reach1 52286 100-year 13000.00 454.98 475.88 475.92 0.000187 2.22 9127.00 2253.02 0.11
Reach1 52286 OLD 500-year 36200.00 454.98 484.30 484.32 0.000036 1.36 31548.21 3126.35 0.05
Reach1 52286 NEW 500-year 55500.00 454.98 488.30 488.33 0.000032 1.43 42928.35 3140.29 0.05
Reach1 51917 2-year 3200.00 453.02 470.17 470.23 0.000172 2.07 1551.13 125.76 0.10
Reach1 51917 5-year 4300.00 453.02 472.06 472.14 0.000193 2.36 2134.86 824.77 0.11
Reach1 51917 10-year 4900.00 453.02 472.88 472.95 0.000177 2.33 2995.21 1382.97 0.10
Reach1 51917 25-year 5800.00 453.02 473.66 473.72 0.000156 2.26 4323.65 1836.81 0.10
Reach1 51917 50-year 6500.00 453.02 474.11 474.16 0.000147 2.23 5155.52 1894.11 0.10
Reach1 51917 100-year 13000.00 453.02 475.78 475.85 0.000212 2.85 8486.37 2104.30 0.12
Reach1 51917 OLD 500-year 36200.00 453.02 484.28 484.30 0.000051 1.80 29573.24 3068.23 0.06
Reach1 51917 NEW 500-year 55500.00 453.02 488.28 488.32 0.000048 1.91 40436.07 3074.17 0.06
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 51630 2-year 3200.00 453.02 470.09 470.17 0.000244 2.28 1426.16 230.05 0.12
Reach1 51630 5-year 4300.00 453.02 471.99 472.08 0.000287 2.47 1944.08 323.47 0.13
Reach1 51630 10-year 4900.00 453.02 472.80 472.89 0.000298 2.52 2545.19 1144.16 0.13
Reach1 51630 25-year 5800.00 453.02 473.58 473.66 0.000289 2.55 3799.60 1889.94 0.13
Reach1 51630 50-year 6500.00 453.02 474.04 474.11 0.000268 2.50 4684.99 1989.39 0.12
Reach1 51630 100-year 13000.00 453.02 475.70 475.78 0.000353 3.04 8116.84 2129.98 0.14
Reach1 51630 OLD 500-year 36200.00 453.02 484.26 484.29 0.000070 1.85 29093.13 3101.56 0.07
Reach1 51630 NEW 500-year 55500.00 453.02 488.27 488.30 0.000061 1.93 40548.23 3104.78 0.07
Reach1 51365 2-year 3200.00 453.02 470.08 470.12 0.000090 1.60 2031.89 256.84 0.07
Reach1 51365 5-year 4300.00 453.02 471.97 472.02 0.000103 1.82 2643.20 704.66 0.08
Reach1 51365 10-year 4900.00 453.02 472.79 472.84 0.000103 1.88 3541.96 1361.59 0.08
Reach1 51365 25-year 5800.00 453.02 473.56 473.61 0.000106 1.95 4705.62 1636.56 0.08
Reach1 51365 50-year 6500.00 453.02 474.01 474.06 0.000111 2.03 5495.66 1888.78 0.08
Reach1 51365 100-year 13000.00 453.02 475.64 475.72 0.000190 2.81 8835.17 2193.00 0.11
Reach1 51365 OLD 500-year 36200.00 453.02 484.25 484.27 0.000043 1.70 33032.55 3141.96 0.06
Reach1 51365 NEW 500-year 55500.00 453.02 488.27 488.29 0.000038 1.74 45274.98 3223.10 0.05
Reach1 50779 2-year 3200.00 453.02 469.98 470.05 0.000168 2.15 1490.21 124.97 0.11
Reach1 50779 5-year 4300.00 453.02 471.84 471.94 0.000197 2.47 1910.36 568.81 0.12
Reach1 50779 10-year 4900.00 453.02 472.66 472.75 0.000194 2.50 2763.18 1466.21 0.12
Reach1 50779 25-year 5800.00 453.02 473.46 473.54 0.000185 2.45 4264.65 2276.52 0.12
Reach1 50779 50-year 6500.00 453.02 473.92 473.99 0.000172 2.42 5359.91 2432.34 0.11
Reach1 50779 100-year 13000.00 453.02 475.56 475.63 0.000226 2.98 9444.65 2622.75 0.13
Reach1 50779 OLD 500-year 36200.00 453.02 484.24 484.26 0.000043 1.74 34829.22 3261.40 0.06
Reach1 50779 NEW 500-year 55500.00 453.02 488.26 488.28 0.000038 1.81 47408.96 3381.27 0.06
Reach1 50498 2-year 3200.00 447.00 469.96 455.22 470.01 0.000094 1.84 1736.03 137.92 0.09
Reach1 50498 5-year 4300.00 447.00 471.82 456.43 471.89 0.000112 2.15 1996.59 1164.43 0.10
Reach1 50498 10-year 4900.00 447.00 472.63 457.03 472.71 0.000123 2.32 2109.54 1716.23 0.11
Reach1 50498 25-year 5800.00 447.00 473.46 457.84 473.50 0.000067 1.77 5434.20 2051.02 0.08
Reach1 50498 50-year 6500.00 447.00 473.93 458.43 473.96 0.000061 1.72 6423.97 2232.89 0.08
Reach1 50498 100-year 13000.00 447.00 475.56 462.70 475.59 0.000082 2.12 10497.32 2700.03 0.09
Reach1 50498 OLD 500-year 36200.00 447.00 484.24 473.55 484.26 0.000016 1.21 36047.25 3093.00 0.04
Reach1 50498 NEW 500-year 55500.00 447.00 488.26 474.56 488.28 0.000014 1.26 48461.64 3093.00 0.04
Reach1 50441 FM 2499 - Grapev Bridge
Reach1 50384 2-year 3200.00 447.00 469.92 455.35 469.98 0.000115 2.01 1588.93 126.48 0.10
Reach1 50384 5-year 4300.00 447.00 471.75 456.60 471.84 0.000140 2.35 1826.96 1111.77 0.11
Reach1 50384 10-year 4900.00 447.00 472.52 457.21 472.62 0.000158 2.54 1931.40 1667.83 0.12
Reach1 50384 25-year 5800.00 447.00 473.20 458.06 473.33 0.000195 2.86 2026.22 1938.40 0.13
Reach1 50384 50-year 6500.00 447.00 473.70 458.68 473.85 0.000221 3.10 2095.58 2112.46 0.14
Reach1 50384 100-year 13000.00 447.00 475.40 463.08 475.53 0.000259 3.56 9757.47 2570.21 0.15
Reach1 50384 OLD 500-year 36200.00 447.00 484.21 471.16 484.25 0.000077 2.56 35505.65 3093.00 0.09
Reach1 50384 NEW 500-year 55500.00 447.00 488.23 475.86 488.27 0.000071 2.69 47929.27 3093.00 0.09
Reach1 50110 2-year 3200.00 453.02 469.84 457.80 469.93 0.000263 2.42 1322.52 108.49 0.12
Reach1 50110 5-year 4300.00 453.02 471.67 458.77 471.78 0.000280 2.72 2202.48 1261.23 0.13
Reach1 50110 10-year 4900.00 453.02 472.47 459.25 472.57 0.000245 2.64 3682.80 2071.84 0.12
Reach1 50110 25-year 5800.00 453.02 473.17 459.94 473.25 0.000224 2.60 5203.94 2261.97 0.12
Reach1 50110 50-year 6500.00 453.02 473.68 460.43 473.75 0.000203 2.54 6381.56 2408.67 0.11
Reach1 50110 100-year 13000.00 453.02 475.35 464.24 475.43 0.000297 3.27 10529.49 2679.12 0.14
Reach1 50110 OLD 500-year 36200.00 453.02 484.20 474.24 484.22 0.000073 2.14 35432.95 2862.37 0.07
Reach1 50110 NEW 500-year 55500.00 453.02 488.22 475.36 488.25 0.000070 2.30 46987.18 2891.01 0.07
Reach1 49882 2-year 3200.00 453.02 469.74 469.85 0.000312 2.60 1234.70 114.68 0.13
Reach1 49882 5-year 4300.00 453.02 471.56 471.69 0.000346 2.96 1832.30 1088.68 0.14
Reach1 49882 10-year 4900.00 453.02 472.40 472.50 0.000282 2.77 3264.41 2061.33 0.13
Reach1 49882 25-year 5800.00 453.02 473.12 473.19 0.000225 2.55 4866.81 2303.16 0.11
Reach1 49882 50-year 6500.00 453.02 473.65 473.70 0.000184 2.36 6098.37 2387.65 0.10
Reach1 49882 100-year 13000.00 453.02 475.32 475.37 0.000215 2.73 10289.76 2579.25 0.11
Reach1 49882 OLD 500-year 36200.00 453.02 484.19 484.21 0.000045 1.63 34462.90 2847.77 0.06
Reach1 49882 NEW 500-year 55500.00 453.02 488.21 488.23 0.000041 1.72 45961.29 2876.59 0.05
Reach1 49497 2-year 3200.00 453.02 469.67 469.75 0.000219 2.23 1492.46 201.62 0.11
Reach1 49497 5-year 4300.00 453.02 471.50 471.58 0.000222 2.38 2783.76 1452.79 0.11
Reach1 49497 10-year 4900.00 453.02 472.36 472.41 0.000173 2.18 4251.00 2146.81 0.10
Reach1 49497 25-year 5800.00 453.02 473.09 473.13 0.000142 2.04 5901.42 2297.13 0.09
Reach1 49497 50-year 6500.00 453.02 473.62 473.65 0.000121 1.93 7131.18 2343.99 0.09
Reach1 49497 100-year 13000.00 453.02 475.28 475.32 0.000162 2.39 11160.91 2481.77 0.10
Reach1 49497 OLD 500-year 36200.00 453.02 484.18 484.20 0.000042 1.61 34818.20 2802.97 0.06
Reach1 49497 NEW 500-year 55500.00 453.02 488.20 488.22 0.000040 1.72 46097.24 2810.52 0.06
Reach1 49174 2-year 3200.00 453.02 469.61 469.68 0.000222 2.20 1503.82 246.09 0.11
Reach1 49174 5-year 4300.00 453.02 471.44 471.52 0.000227 2.30 2786.74 1276.94 0.12
Reach1 49174 10-year 4900.00 453.02 472.31 472.36 0.000186 2.12 4063.46 1844.51 0.11
Reach1 49174 25-year 5800.00 453.02 473.05 473.09 0.000159 2.00 5630.67 2226.01 0.10
Reach1 49174 50-year 6500.00 453.02 473.59 473.62 0.000134 1.89 6855.27 2313.40 0.09
Reach1 49174 100-year 13000.00 453.02 475.24 475.28 0.000176 2.34 10737.16 2392.32 0.11
Reach1 49174 OLD 500-year 36200.00 453.02 484.17 484.19 0.000043 1.57 33862.73 2730.13 0.06
Reach1 49174 NEW 500-year 55500.00 453.02 488.19 488.22 0.000040 1.68 44864.82 2746.25 0.06
Reach1 48808 2-year 3200.00 453.02 469.51 469.59 0.000241 2.29 1512.35 329.16 0.12
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 48808 5-year 4300.00 453.02 471.34 471.43 0.000242 2.43 2503.22 905.38 0.12
Reach1 48808 10-year 4900.00 453.02 472.22 472.29 0.000208 2.34 3430.01 1202.08 0.11
Reach1 48808 25-year 5800.00 453.02 472.97 473.03 0.000192 2.33 4521.28 1778.32 0.11
Reach1 48808 50-year 6500.00 453.02 473.51 473.57 0.000173 2.26 5596.07 2093.51 0.10
Reach1 48808 100-year 13000.00 453.02 475.15 475.21 0.000227 2.78 9250.45 2301.17 0.12
Reach1 48808 OLD 500-year 36200.00 453.02 484.16 484.18 0.000044 1.63 32308.77 2709.19 0.06
Reach1 48808 NEW 500-year 55500.00 453.02 488.18 488.20 0.000040 1.71 43252.74 2729.00 0.06
Reach1 48429 2-year 3200.00 450.98 469.45 469.51 0.000169 1.97 1869.10 537.97 0.10
Reach1 48429 5-year 4300.00 450.98 471.30 471.35 0.000142 1.91 3342.36 1115.64 0.09
Reach1 48429 10-year 4900.00 450.98 472.19 472.22 0.000120 1.83 4390.73 1252.25 0.08
Reach1 48429 25-year 5800.00 450.98 472.93 472.97 0.000111 1.82 5360.98 1340.40 0.08
Reach1 48429 50-year 6500.00 450.98 473.48 473.51 0.000104 1.81 6109.23 1394.03 0.08
Reach1 48429 100-year 13000.00 450.98 475.08 475.14 0.000183 2.56 8902.62 2076.29 0.11
Reach1 48429 OLD 500-year 36200.00 450.98 484.14 484.16 0.000042 1.61 31416.96 2690.00 0.06
Reach1 48429 NEW 500-year 55500.00 450.98 488.16 488.19 0.000038 1.69 42481.26 2773.58 0.05
Reach1 48119 2-year 3200.00 450.98 469.42 469.46 0.000116 1.74 2181.04 547.28 0.08
Reach1 48119 5-year 4300.00 450.98 471.27 471.31 0.000108 1.71 3741.67 1065.67 0.08
Reach1 48119 10-year 4900.00 450.98 472.16 472.19 0.000095 1.66 4746.35 1274.89 0.08
Reach1 48119 25-year 5800.00 450.98 472.91 472.94 0.000095 1.71 5755.51 1388.86 0.08
Reach1 48119 50-year 6500.00 450.98 473.45 473.48 0.000091 1.71 6540.30 1470.79 0.07
Reach1 48119 100-year 13000.00 450.98 475.03 475.08 0.000170 2.49 9032.68 1653.55 0.10
Reach1 48119 OLD 500-year 36200.00 450.98 484.12 484.15 0.000049 1.76 30848.64 2636.75 0.06
Reach1 48119 NEW 500-year 55500.00 450.98 488.15 488.18 0.000045 1.85 41558.07 2672.08 0.06
Reach1 47820 2-year 3200.00 451.27 469.39 469.43 0.000113 1.72 2383.77 783.65 0.08
Reach1 47820 5-year 4300.00 451.27 471.24 471.28 0.000100 1.73 4204.23 1207.91 0.08
Reach1 47820 10-year 4900.00 451.27 472.13 472.16 0.000083 1.64 5362.31 1420.45 0.07
Reach1 47820 25-year 5800.00 451.27 472.88 472.91 0.000080 1.65 6457.72 1503.31 0.07
Reach1 47820 50-year 6500.00 451.27 473.43 473.46 0.000077 1.66 7297.70 1553.74 0.07
Reach1 47820 100-year 13000.00 451.27 474.98 475.04 0.000150 2.45 9842.67 1723.64 0.10
Reach1 47820 OLD 500-year 36200.00 451.27 484.11 484.14 0.000049 1.82 31504.39 2720.12 0.06
Reach1 47820 NEW 500-year 55500.00 451.27 488.14 488.17 0.000044 1.88 42657.04 2784.53 0.06
Reach1 47536 2-year 3200.00 451.27 469.37 455.62 469.40 0.000091 1.54 2862.93 844.48 0.07
Reach1 47536 5-year 4300.00 451.27 471.23 456.56 471.25 0.000064 1.38 4774.15 1290.52 0.06
Reach1 47536 10-year 4900.00 451.27 472.12 457.01 472.14 0.000052 1.29 5985.72 1418.82 0.06
Reach1 47536 25-year 5800.00 451.27 472.87 457.67 472.89 0.000049 1.28 7082.21 1489.46 0.05
Reach1 47536 50-year 6500.00 451.27 473.42 458.14 473.44 0.000046 1.27 7907.43 1516.41 0.05
Reach1 47536 100-year 13000.00 451.27 474.97 461.86 475.00 0.000090 1.88 10438.87 1759.47 0.08
Reach1 47536 OLD 500-year 36200.00 451.27 484.10 470.59 484.12 0.000029 1.37 32414.59 2905.32 0.05
Reach1 47536 NEW 500-year 55500.00 451.27 488.13 472.24 488.15 0.000026 1.44 44128.38 2910.80 0.04
Reach1 47137 2-year 3200.00 451.27 469.36 454.97 469.37 0.000037 1.03 4612.08 1200.14 0.05
Reach1 47137 5-year 4300.00 451.27 471.22 455.75 471.23 0.000024 0.88 7220.10 1750.34 0.04
Reach1 47137 10-year 4900.00 451.27 472.12 456.14 472.13 0.000020 0.81 8629.84 1868.11 0.03
Reach1 47137 25-year 5800.00 451.27 472.87 456.70 472.88 0.000019 0.82 9817.43 1905.62 0.03
Reach1 47137 50-year 6500.00 451.27 473.42 457.09 473.42 0.000019 0.83 10690.51 1970.65 0.03
Reach1 47137 100-year 13000.00 451.27 474.95 460.31 474.97 0.000040 1.28 13149.73 2122.11 0.05
Reach1 47137 OLD 500-year 36200.00 451.27 484.10 468.14 484.11 0.000018 1.10 38292.81 2812.34 0.04
Reach1 47137 NEW 500-year 55500.00 451.27 488.13 470.55 488.14 0.000019 1.24 49837.56 2919.39 0.04
Reach1 46756 2-year 4600.00 451.27 469.29 456.20 469.34 0.000171 2.02 2904.20 605.66 0.10
Reach1 46756 5-year 6200.00 451.27 471.17 457.25 471.21 0.000141 1.88 4383.84 1314.42 0.09
Reach1 46756 10-year 7100.00 451.27 472.07 457.81 472.11 0.000122 1.81 5383.01 1606.88 0.08
Reach1 46756 25-year 8100.00 451.27 472.82 458.40 472.86 0.000113 1.80 6250.70 1797.19 0.08
Reach1 46756 50-year 9100.00 451.27 473.37 458.98 473.41 0.000113 1.84 6927.64 1944.37 0.08
Reach1 46756 100-year 13000.00 451.27 474.91 460.96 474.95 0.000122 2.04 8935.64 2211.28 0.09
Reach1 46756 OLD 500-year 36200.00 451.27 484.09 470.15 484.11 0.000034 1.44 33387.69 2534.59 0.05
Reach1 46756 NEW 500-year 55500.00 451.27 488.11 471.91 488.14 0.000035 1.60 43731.15 2614.00 0.05
Reach1 46414 2-year 4600.00 451.27 469.19 457.19 469.27 0.000269 2.35 2278.23 966.35 0.12
Reach1 46414 5-year 6200.00 451.27 471.08 458.35 471.15 0.000224 2.37 3259.13 1481.66 0.12
Reach1 46414 10-year 7100.00 451.27 471.99 458.94 472.06 0.000196 2.32 3903.19 1626.50 0.11
Reach1 46414 25-year 8100.00 451.27 472.75 459.56 472.81 0.000184 2.33 4486.12 1702.15 0.11
Reach1 46414 50-year 9100.00 451.27 473.30 460.14 473.36 0.000184 2.39 4923.61 1802.65 0.11
Reach1 46414 100-year 13000.00 451.27 474.82 462.14 474.90 0.000205 2.68 6244.61 1965.64 0.12
Reach1 46414 OLD 500-year 36200.00 451.27 484.08 471.03 484.10 0.000025 1.27 32813.23 2427.41 0.04
Reach1 46414 NEW 500-year 55500.00 451.27 488.10 472.97 488.13 0.000026 1.42 42594.45 2435.96 0.05
Reach1 46135 2-year 5200.00 450.00 469.05 456.87 469.18 0.000319 3.07 1896.13 273.33 0.16
Reach1 46135 5-year 6300.00 450.00 470.97 457.80 471.08 0.000236 2.94 2479.39 317.00 0.14
Reach1 46135 10-year 7000.00 450.00 471.88 458.35 471.99 0.000215 2.94 2771.42 320.99 0.14
Reach1 46135 25-year 8100.00 450.00 472.62 459.16 472.75 0.000228 3.14 3009.79 324.21 0.14
Reach1 46135 50-year 8500.00 450.00 473.17 459.44 473.30 0.000213 3.10 3190.52 326.63 0.14
Reach1 46135 100-year 13000.00 450.00 474.59 462.30 474.81 0.000335 4.13 3657.95 332.80 0.18
Reach1 46135 OLD 500-year 36200.00 450.00 483.57 470.86 484.03 0.000399 6.02 6756.24 1933.85 0.21
Reach1 46135 NEW 500-year 55500.00 450.00 487.98 473.59 488.10 0.000128 3.80 21739.36 2300.00 0.12
Reach1 46076 Lakeside Parkway Bridge
Reach1 46018 2-year 5200.00 450.00 469.00 456.86 469.13 0.000325 3.09 1882.42 233.34 0.16
Reach1 46018 5-year 6300.00 450.00 470.93 457.80 471.04 0.000239 2.95 2466.72 316.83 0.15
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 46018 10-year 7000.00 450.00 471.84 458.33 471.96 0.000217 2.95 2759.62 320.83 0.14
Reach1 46018 25-year 8100.00 450.00 472.58 459.17 472.71 0.000231 3.15 2996.95 324.03 0.15
Reach1 46018 50-year 8500.00 450.00 473.14 459.45 473.26 0.000215 3.12 3178.42 326.46 0.14
Reach1 46018 100-year 13000.00 450.00 474.53 462.29 474.75 0.000340 4.16 3637.97 332.54 0.18
Reach1 46018 OLD 500-year 36200.00 450.00 482.96 470.87 483.46 0.000441 6.23 6542.64 1853.59 0.22
Reach1 46018 NEW 500-year 55500.00 450.00 487.92 473.60 488.04 0.000131 3.83 21593.22 2300.00 0.12
Reach1 45316 2-year 5200.00 449.23 468.87 453.86 468.93 0.000175 2.12 3186.93 965.50 0.10
Reach1 45316 5-year 6300.00 449.23 470.84 454.48 470.89 0.000131 1.98 4410.18 1178.18 0.09
Reach1 45316 10-year 7000.00 449.23 471.77 454.85 471.82 0.000118 1.96 5040.16 1222.63 0.09
Reach1 45316 25-year 8100.00 449.23 472.50 455.41 472.56 0.000124 2.07 5543.04 1248.08 0.09
Reach1 45316 50-year 8500.00 449.23 473.07 455.60 473.12 0.000113 2.03 5931.98 1267.70 0.09
Reach1 45316 100-year 13000.00 449.23 474.44 457.62 474.52 0.000175 2.65 6908.01 1376.38 0.11
Reach1 45316 OLD 500-year 36200.00 449.23 483.08 466.59 483.12 0.000086 2.38 23339.62 1595.87 0.08
Reach1 45316 NEW 500-year 55500.00 449.23 487.89 471.53 487.94 0.000085 2.63 31242.90 1700.85 0.08
Reach1 45119 2-year 5200.00 449.23 468.85 468.89 0.000123 1.75 4199.92 723.93 0.09
Reach1 45119 5-year 6300.00 449.23 470.83 470.86 0.000090 1.65 5866.22 955.44 0.08
Reach1 45119 10-year 7000.00 449.23 471.76 471.79 0.000081 1.63 6793.65 1037.44 0.07
Reach1 45119 25-year 8100.00 449.23 472.50 472.53 0.000085 1.72 7595.82 1172.38 0.07
Reach1 45119 50-year 8500.00 449.23 473.06 473.09 0.000076 1.67 8289.96 1249.41 0.07
Reach1 45119 100-year 13000.00 449.23 474.43 474.48 0.000110 2.11 10030.78 1288.70 0.09
Reach1 45119 OLD 500-year 36200.00 449.23 483.05 483.10 0.000085 2.39 21473.68 1352.57 0.08
Reach1 45119 NEW 500-year 55500.00 449.23 487.86 487.92 0.000084 2.65 27999.95 1364.35 0.08
Reach1 44906 2-year 5200.00 449.23 468.83 468.87 0.000105 1.62 4693.00 975.03 0.08
Reach1 44906 5-year 6300.00 449.23 470.82 470.84 0.000070 1.45 6670.08 1013.15 0.07
Reach1 44906 10-year 7000.00 449.23 471.75 471.77 0.000061 1.41 7622.41 1025.71 0.06
Reach1 44906 25-year 8100.00 449.23 472.49 472.51 0.000063 1.48 8391.44 1162.05 0.06
Reach1 44906 50-year 8500.00 449.23 473.06 473.08 0.000057 1.44 9059.49 1185.20 0.06
Reach1 44906 100-year 13000.00 449.23 474.42 474.45 0.000085 1.85 10731.56 1269.54 0.08
Reach1 44906 OLD 500-year 36200.00 449.23 483.04 483.09 0.000072 2.19 21856.52 1312.27 0.07
Reach1 44906 NEW 500-year 55500.00 449.23 487.84 487.91 0.000073 2.46 28217.08 1336.08 0.08
Reach1 44735 2-year 5100.00 449.23 468.81 468.85 0.000103 1.71 4313.30 1026.86 0.08
Reach1 44735 5-year 6200.00 449.23 470.80 470.83 0.000072 1.51 6535.46 1170.52 0.07
Reach1 44735 10-year 7000.00 449.23 471.74 471.76 0.000064 1.48 7646.23 1200.89 0.06
Reach1 44735 25-year 8000.00 449.23 472.47 472.50 0.000063 1.51 8535.04 1239.78 0.06
Reach1 44735 50-year 8500.00 449.23 473.04 473.07 0.000058 1.48 9293.90 1357.48 0.06
Reach1 44735 100-year 13000.00 449.23 474.40 474.44 0.000084 1.87 11177.88 1421.62 0.08
Reach1 44735 OLD 500-year 36200.00 449.23 483.03 483.07 0.000065 2.11 23800.93 1485.85 0.07
Reach1 44735 NEW 500-year 55500.00 449.23 487.84 487.89 0.000064 2.35 30999.45 1509.94 0.07
Reach1 44343 2-year 5100.00 449.23 468.76 468.80 0.000139 1.89 3871.35 1264.59 0.09
Reach1 44343 5-year 6200.00 449.23 470.78 470.80 0.000068 1.44 6597.97 1389.01 0.07
Reach1 44343 10-year 7000.00 449.23 471.72 471.74 0.000055 1.35 7919.76 1424.26 0.06
Reach1 44343 25-year 8000.00 449.23 472.46 472.47 0.000052 1.35 8984.36 1457.22 0.06
Reach1 44343 50-year 8500.00 449.23 473.03 473.04 0.000046 1.31 9851.69 1578.61 0.06
Reach1 44343 100-year 13000.00 449.23 474.38 474.41 0.000063 1.60 12052.64 1644.37 0.07
Reach1 44343 OLD 500-year 36200.00 449.23 483.02 483.05 0.000041 1.66 26862.24 1752.57 0.06
Reach1 44343 NEW 500-year 55500.00 449.23 487.83 487.87 0.000039 1.82 35383.58 1792.59 0.06
Reach1 44035 2-year 5100.00 449.23 468.70 468.75 0.000174 2.12 3551.17 1389.50 0.10
Reach1 44035 5-year 6200.00 449.23 470.75 470.78 0.000077 1.55 6537.79 1509.42 0.07
Reach1 44035 10-year 7000.00 449.23 471.70 471.72 0.000059 1.41 7977.59 1530.93 0.06
Reach1 44035 25-year 8000.00 449.23 472.44 472.46 0.000054 1.39 9117.02 1547.91 0.06
Reach1 44035 50-year 8500.00 449.23 473.01 473.03 0.000048 1.33 10033.05 1660.76 0.06
Reach1 44035 100-year 13000.00 449.23 474.37 474.39 0.000063 1.61 12369.88 1763.19 0.06
Reach1 44035 OLD 500-year 36200.00 449.23 483.01 483.03 0.000039 1.61 28380.84 1895.73 0.05
Reach1 44035 NEW 500-year 55500.00 449.23 487.82 487.85 0.000037 1.75 37732.14 1954.00 0.05
Reach1 43798 2-year 5100.00 449.23 468.68 468.71 0.000122 1.83 5243.83 1302.49 0.09
Reach1 43798 5-year 6200.00 449.23 470.74 470.76 0.000068 1.50 8617.25 1802.31 0.07
Reach1 43798 10-year 7000.00 449.23 471.69 471.70 0.000056 1.40 10375.63 1916.71 0.06
Reach1 43798 25-year 8000.00 449.23 472.43 472.44 0.000052 1.39 11813.07 1965.94 0.06
Reach1 43798 50-year 8500.00 449.23 473.00 473.02 0.000046 1.35 12965.87 2043.26 0.06
Reach1 43798 100-year 13000.00 449.23 474.35 474.37 0.000064 1.66 15830.32 2220.74 0.07
Reach1 43798 OLD 500-year 36200.00 449.23 483.00 483.02 0.000044 1.76 35717.68 2333.72 0.06
Reach1 43798 NEW 500-year 55500.00 449.23 487.81 487.84 0.000043 1.93 46969.23 2340.00 0.06
Reach1 43456 2-year 5100.00 449.23 468.64 468.68 0.000119 1.76 4603.78 1140.58 0.08
Reach1 43456 5-year 6200.00 449.23 470.71 470.74 0.000070 1.48 7855.88 1710.44 0.07
Reach1 43456 10-year 7000.00 449.23 471.67 471.69 0.000058 1.40 9562.11 1878.96 0.06
Reach1 43456 25-year 8000.00 449.23 472.41 472.43 0.000055 1.40 10996.34 1976.11 0.06
Reach1 43456 50-year 8500.00 449.23 472.99 473.00 0.000049 1.35 12164.39 2072.21 0.06
Reach1 43456 100-year 13000.00 449.23 474.33 474.35 0.000069 1.69 15092.04 2277.43 0.07
Reach1 43456 OLD 500-year 36200.00 449.23 482.99 483.01 0.000051 1.87 35509.42 2381.56 0.06
Reach1 43456 NEW 500-year 55500.00 449.23 487.80 487.83 0.000051 2.06 47019.11 2401.25 0.06
Reach1 43032 2-year 5000.00 449.23 468.59 468.63 0.000170 1.69 3298.76 832.06 0.10
Reach1 43032 5-year 6200.00 449.23 470.68 470.71 0.000102 1.49 5814.21 1375.61 0.08
Reach1 43032 10-year 6800.00 449.23 471.64 471.66 0.000079 1.38 7189.70 1479.90 0.07
Reach1 43032 25-year 7900.00 449.23 472.38 472.40 0.000078 1.43 8312.87 1548.02 0.07
Reach1 43032 50-year 8400.00 449.23 472.96 472.98 0.000070 1.39 9227.65 1609.81 0.07
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 43032 100-year 13000.00 449.23 474.29 474.32 0.000102 1.79 11658.23 2228.63 0.08
Reach1 43032 OLD 500-year 36200.00 449.23 482.96 482.99 0.000066 1.95 32576.44 2450.70 0.07
Reach1 43032 NEW 500-year 55500.00 449.23 487.78 487.81 0.000062 2.14 44442.34 2475.02 0.07
Reach1 42726 2-year 6400.00 449.23 468.47 468.56 0.000328 2.51 2691.94 340.44 0.14
Reach1 42726 5-year 8200.00 449.23 470.57 470.66 0.000281 2.53 3716.59 617.10 0.13
Reach1 42726 10-year 9200.00 449.23 471.54 471.62 0.000254 2.53 4371.32 730.39 0.12
Reach1 42726 25-year 10000.00 449.23 472.29 472.37 0.000235 2.53 4946.03 808.40 0.12
Reach1 42726 50-year 10800.00 449.23 472.87 472.95 0.000229 2.56 5500.08 1301.28 0.12
Reach1 42726 100-year 13000.00 449.23 474.21 474.28 0.000216 2.65 7790.81 1925.08 0.12
Reach1 42726 OLD 500-year 36200.00 449.23 482.92 482.97 0.000122 2.68 26494.93 2206.98 0.10
Reach1 42726 NEW 500-year 55500.00 449.23 487.74 487.79 0.000108 2.84 37217.20 2230.00 0.09
Reach1 42395 2-year 6400.00 449.23 468.39 468.47 0.000350 2.40 2749.39 349.95 0.14
Reach1 42395 5-year 8200.00 449.23 470.51 470.58 0.000277 2.36 3926.27 909.02 0.13
Reach1 42395 10-year 9200.00 449.23 471.49 471.55 0.000242 2.34 4871.53 1017.43 0.12
Reach1 42395 25-year 10000.00 449.23 472.24 472.31 0.000219 2.32 5681.31 1155.18 0.12
Reach1 42395 50-year 10800.00 449.23 472.83 472.89 0.000209 2.33 6386.84 1310.53 0.11
Reach1 42395 100-year 13000.00 449.23 474.17 474.23 0.000191 2.38 8446.74 1656.72 0.11
Reach1 42395 OLD 500-year 36200.00 449.23 482.88 482.94 0.000131 2.70 24630.71 1892.49 0.10
Reach1 42395 NEW 500-year 55500.00 449.23 487.70 487.77 0.000122 2.97 33785.53 1903.00 0.10
Reach1 41612 2-year 6400.00 449.23 468.19 468.28 0.000315 2.48 2820.17 366.34 0.13
Reach1 41612 5-year 8200.00 449.23 470.35 470.43 0.000280 2.40 3740.73 526.23 0.13
Reach1 41612 10-year 9200.00 449.23 471.34 471.42 0.000255 2.43 4362.76 798.39 0.12
Reach1 41612 25-year 10000.00 449.23 472.11 472.18 0.000230 2.41 4910.23 1090.77 0.12
Reach1 41612 50-year 10800.00 449.23 472.70 472.77 0.000220 2.43 5375.57 1277.42 0.12
Reach1 41612 100-year 13000.00 449.23 474.05 474.13 0.000209 2.52 6615.16 1672.89 0.12
Reach1 41612 OLD 500-year 36200.00 449.23 482.77 482.88 0.000182 3.21 16668.93 1955.20 0.12
Reach1 41612 NEW 500-year 55500.00 449.23 487.60 487.71 0.000172 3.54 24357.51 1960.00 0.12
Reach1 41353 2-year 6400.00 449.23 468.11 468.19 0.000249 2.25 3323.45 380.19 0.12
Reach1 41353 5-year 8200.00 449.23 470.27 470.35 0.000237 2.30 4397.05 617.47 0.12
Reach1 41353 10-year 9200.00 449.23 471.27 471.35 0.000228 2.33 5050.09 707.31 0.12
Reach1 41353 25-year 10000.00 449.23 472.04 472.12 0.000213 2.35 5610.07 848.45 0.12
Reach1 41353 50-year 10800.00 449.23 472.63 472.71 0.000209 2.40 6060.91 1087.33 0.12
Reach1 41353 100-year 13000.00 449.23 473.98 474.07 0.000207 2.55 7165.13 1585.86 0.12
Reach1 41353 OLD 500-year 36200.00 449.23 482.67 482.82 0.000222 3.58 15274.23 1866.04 0.13
Reach1 41353 NEW 500-year 55500.00 449.23 487.48 487.65 0.000222 4.05 22123.12 1870.00 0.13
Reach1 40922 2-year 6400.00 449.23 467.95 468.05 0.000474 2.95 2844.86 646.10 0.19
Reach1 40922 5-year 8200.00 449.23 470.18 470.24 0.000324 2.49 4540.35 823.89 0.15
Reach1 40922 10-year 9200.00 449.23 471.19 471.25 0.000278 2.36 5381.47 844.53 0.14
Reach1 40922 25-year 10000.00 449.23 471.97 472.03 0.000248 2.29 6040.94 882.82 0.13
Reach1 40922 50-year 10800.00 449.23 472.57 472.62 0.000236 2.29 6543.63 915.67 0.12
Reach1 40922 100-year 13000.00 449.23 473.93 473.98 0.000222 2.33 7696.60 1169.45 0.12
Reach1 40922 OLD 500-year 36200.00 449.23 482.64 482.73 0.000218 3.03 16095.16 2132.48 0.12
Reach1 40922 NEW 500-year 55500.00 449.23 487.46 487.57 0.000200 3.27 23668.40 2134.00 0.11
Reach1 40579 2-year 6400.00 449.23 467.97 467.99 0.000068 1.39 6393.92 515.61 0.07
Reach1 40579 5-year 8200.00 449.23 470.18 470.20 0.000074 1.32 7590.09 583.53 0.07
Reach1 40579 10-year 9200.00 449.23 471.19 471.21 0.000073 1.38 8171.82 645.33 0.07
Reach1 40579 25-year 10000.00 449.23 471.97 471.99 0.000071 1.42 8626.36 928.10 0.07
Reach1 40579 50-year 10800.00 449.23 472.56 472.59 0.000073 1.48 8973.27 1045.44 0.07
Reach1 40579 100-year 13000.00 449.23 473.92 473.95 0.000080 1.64 9770.11 1136.22 0.07
Reach1 40579 OLD 500-year 36200.00 449.23 482.60 482.69 0.000141 2.92 15750.79 1919.24 0.10
Reach1 40579 NEW 500-year 55500.00 449.23 487.41 487.53 0.000157 3.30 22103.12 1920.00 0.11
Reach1 40302 2-year 6400.00 449.23 467.93 467.97 0.000188 1.65 4306.12 473.47 0.09
Reach1 40302 5-year 8200.00 449.23 470.13 470.17 0.000169 1.70 5384.47 506.64 0.09
Reach1 40302 10-year 9200.00 449.23 471.14 471.18 0.000161 1.75 5896.27 584.41 0.08
Reach1 40302 25-year 10000.00 449.23 471.92 471.97 0.000155 1.78 6296.28 789.21 0.08
Reach1 40302 50-year 10800.00 449.23 472.51 472.56 0.000156 1.84 6600.81 905.17 0.08
Reach1 40302 100-year 13000.00 449.23 473.86 473.92 0.000166 2.01 7299.20 1125.47 0.09
Reach1 40302 OLD 500-year 36200.00 449.23 482.51 482.65 0.000244 3.26 12964.77 1891.66 0.12
Reach1 40302 NEW 500-year 55500.00 449.23 487.31 487.48 0.000250 3.67 19116.96 1900.00 0.12
Reach1 39973 2-year 6400.00 449.23 467.66 467.84 0.000672 3.59 2345.13 377.61 0.19
Reach1 39973 5-year 8200.00 449.23 469.91 470.06 0.000538 3.47 3420.32 514.96 0.18
Reach1 39973 10-year 9200.00 449.23 470.94 471.08 0.000474 3.43 3958.29 541.28 0.17
Reach1 39973 25-year 10000.00 449.23 471.73 471.87 0.000429 3.40 4401.94 645.87 0.16
Reach1 39973 50-year 10800.00 449.23 472.33 472.47 0.000414 3.43 4741.40 842.90 0.16
Reach1 39973 100-year 13000.00 449.23 473.68 473.82 0.000400 3.58 5513.81 1083.66 0.16
Reach1 39973 OLD 500-year 36200.00 449.23 482.28 482.53 0.000417 4.91 11318.81 1747.18 0.18
Reach1 39973 NEW 500-year 55500.00 449.23 487.11 487.37 0.000395 5.39 17221.36 1765.00 0.18
Reach1 39627 2-year 6400.00 449.23 467.42 467.60 0.000705 3.68 2271.92 295.03 0.20
Reach1 39627 5-year 8200.00 449.23 469.70 469.87 0.000601 3.62 2975.71 321.72 0.19
Reach1 39627 10-year 9200.00 449.23 470.74 470.91 0.000555 3.67 3323.43 351.37 0.18
Reach1 39627 25-year 10000.00 449.23 471.54 471.71 0.000520 3.70 3614.51 488.75 0.18
Reach1 39627 50-year 10800.00 449.23 472.13 472.31 0.000515 3.78 3833.65 684.69 0.18
Reach1 39627 100-year 13000.00 449.23 473.46 473.67 0.000527 4.07 4333.85 935.50 0.18
Reach1 39627 OLD 500-year 36200.00 449.23 481.93 482.35 0.000663 6.11 8410.51 1746.75 0.22
Reach1 39627 NEW 500-year 55500.00 449.23 486.74 487.20 0.000640 6.78 13273.08 1747.00 0.22
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 39155 2-year 6400.00 449.23 467.25 467.36 0.000327 2.68 2389.17 209.17 0.14
Reach1 39155 5-year 8200.00 449.23 469.53 469.66 0.000322 2.81 2914.60 267.35 0.15
Reach1 39155 10-year 9200.00 449.23 470.58 470.71 0.000308 2.87 3222.07 318.29 0.15
Reach1 39155 25-year 10000.00 449.23 471.39 471.52 0.000294 2.91 3493.30 449.29 0.15
Reach1 39155 50-year 10800.00 449.23 471.99 472.12 0.000294 2.98 3707.22 726.78 0.15
Reach1 39155 100-year 13000.00 449.23 473.31 473.47 0.000304 3.21 4200.68 988.40 0.15
Reach1 39155 OLD 500-year 36200.00 449.23 481.75 482.10 0.000398 4.91 8358.09 1902.93 0.18
Reach1 39155 NEW 500-year 55500.00 449.23 486.49 486.95 0.000458 5.98 13201.79 1961.93 0.20
Reach1 38743 2-year 6400.00 449.23 467.29 467.31 0.000024 0.84 7632.62 557.55 0.04
Reach1 38743 5-year 8200.00 449.23 469.58 469.59 0.000025 0.92 8924.40 571.87 0.04
Reach1 38743 10-year 9200.00 449.23 470.63 470.65 0.000026 0.97 9528.94 594.19 0.04
Reach1 38743 25-year 10000.00 449.23 471.44 471.46 0.000026 1.00 10031.28 684.82 0.04
Reach1 38743 50-year 10800.00 449.23 472.04 472.06 0.000027 1.04 10402.48 812.56 0.04
Reach1 38743 100-year 13000.00 449.23 473.38 473.40 0.000031 1.17 11236.41 1079.52 0.05
Reach1 38743 OLD 500-year 36200.00 449.23 481.88 481.95 0.000069 2.20 16706.11 1819.38 0.07
Reach1 38743 NEW 500-year 55500.00 449.23 486.65 486.77 0.000093 2.83 21884.74 1861.34 0.09
Reach1 38379 2-year 6400.00 449.23 467.27 467.28 0.001183 0.87 7350.91 558.58 0.04
Reach1 38379 5-year 8200.00 449.23 469.56 469.57 0.001192 0.95 8641.65 570.65 0.04
Reach1 38379 10-year 9200.00 449.23 470.61 470.62 0.001210 0.99 9249.45 594.46 0.04
Reach1 38379 25-year 10000.00 449.23 471.42 471.44 0.001204 1.03 9742.27 616.95 0.04
Reach1 38379 50-year 10800.00 449.23 472.01 472.03 0.001237 1.06 10118.73 725.54 0.04
Reach1 38379 100-year 13000.00 449.23 473.35 473.37 0.001345 1.16 10965.01 1100.82 0.05
Reach1 38379 OLD 500-year 36200.00 449.23 481.58 481.87 0.002202 1.90 16425.37 1676.52 0.06
Reach1 38379 NEW 500-year 55500.00 449.23 486.53 486.69 0.002552 2.28 21449.18 1676.52 0.07
Reach1 37780 2-year 6400.00 447.23 466.32 466.65 0.000860 4.61 1387.18 102.61 0.22
Reach1 37780 5-year 8200.00 447.23 468.51 468.91 0.000924 5.06 1619.05 109.29 0.23
Reach1 37780 10-year 9200.00 447.23 469.49 469.93 0.000959 5.32 1731.70 141.49 0.24
Reach1 37780 25-year 10000.00 447.23 470.28 470.74 0.000967 5.50 1832.69 231.33 0.24
Reach1 37780 50-year 10800.00 447.23 470.81 471.32 0.001010 5.74 1904.11 256.63 0.25
Reach1 37780 100-year 13000.00 447.23 471.92 472.56 0.001169 6.44 2054.21 341.23 0.27
Reach1 37780 OLD 500-year 36200.00 447.23 477.43 480.02 0.003391 13.13 3041.38 1122.14 0.48
Reach1 37780 NEW 500-year 55500.00 447.23 479.58 484.12 0.005443 17.64 3649.96 1240.11 0.62
Reach1 37566 2-year 6400.00 447.23 466.07 454.87 466.45 0.000938 4.89 1309.48 90.27 0.23
Reach1 37566 5-year 8200.00 447.23 468.23 456.16 468.68 0.001026 5.41 1611.27 446.49 0.24
Reach1 37566 10-year 9200.00 447.23 469.29 456.81 469.73 0.000972 5.45 2054.33 528.55 0.23
Reach1 37566 25-year 10000.00 447.23 470.10 457.33 470.52 0.000905 5.40 2397.17 545.64 0.23
Reach1 37566 50-year 10800.00 447.23 470.65 457.82 471.06 0.000898 5.47 2626.92 552.68 0.23
Reach1 37566 100-year 13000.00 447.23 471.80 459.07 472.23 0.000931 5.75 3110.36 573.47 0.23
Reach1 37566 OLD 500-year 36200.00 447.23 477.87 471.59 478.66 0.001456 8.58 6319.60 973.30 0.30
Reach1 37566 NEW 500-year 55500.00 447.23 480.73 474.27 481.74 0.001746 10.10 8392.40 1186.16 0.34
Reach1 37305 2-year 6400.00 447.23 465.44 466.05 0.001707 6.27 1020.91 71.24 0.29
Reach1 37305 5-year 8200.00 447.23 467.47 468.23 0.001919 7.01 1172.50 91.90 0.31
Reach1 37305 10-year 9200.00 447.23 468.41 469.25 0.001998 7.37 1302.35 309.10 0.32
Reach1 37305 25-year 10000.00 447.23 469.20 470.05 0.001967 7.49 1500.49 468.69 0.32
Reach1 37305 50-year 10800.00 447.23 469.71 470.59 0.002003 7.67 1641.78 471.14 0.32
Reach1 37305 100-year 13000.00 447.23 470.75 471.71 0.002181 8.23 1931.11 557.02 0.34
Reach1 37305 OLD 500-year 36200.00 447.23 476.44 472.73 477.90 0.003226 11.77 4731.15 1035.96 0.43
Reach1 37305 NEW 500-year 55500.00 447.23 480.23 476.85 481.20 0.002201 10.75 8936.89 1362.15 0.36
Reach1 37010 2-year 6400.00 447.23 463.83 465.06 0.004947 8.92 717.71 68.04 0.48
Reach1 37010 5-year 8500.00 447.23 465.41 467.04 0.005876 10.26 828.39 125.78 0.53
Reach1 37010 10-year 9700.00 447.23 466.02 467.94 0.006532 11.10 875.97 160.40 0.57
Reach1 37010 25-year 10700.00 447.23 466.50 468.65 0.007035 11.75 917.74 184.61 0.59
Reach1 37010 50-year 11400.00 447.23 466.82 469.12 0.007384 12.19 946.94 202.64 0.61
Reach1 37010 100-year 13000.00 447.23 467.30 470.04 0.008497 13.33 996.89 233.62 0.65
Reach1 37010 OLD 500-year 36200.00 447.23 472.40 472.40 475.80 0.009335 16.49 2558.88 773.59 0.72
Reach1 37010 NEW 500-year 55500.00 447.23 474.88 474.88 479.06 0.009376 18.02 3450.95 839.55 0.73
Reach1 36794 2-year 6400.00 440.00 463.49 455.05 464.07 0.001207 6.09 1060.93 107.71 0.31
Reach1 36794 5-year 8500.00 440.00 465.09 456.83 465.75 0.001286 6.68 1455.02 313.29 0.33
Reach1 36794 10-year 9700.00 440.00 465.75 457.71 466.41 0.001293 6.86 1662.67 318.28 0.34
Reach1 36794 25-year 10700.00 440.00 466.27 458.41 466.93 0.001276 6.93 1831.88 329.97 0.34
Reach1 36794 50-year 11400.00 440.00 466.62 458.86 467.27 0.001263 6.98 1946.65 342.17 0.34
Reach1 36794 100-year 13000.00 440.00 467.14 459.86 467.84 0.001333 7.29 2131.13 360.90 0.35
Reach1 36794 OLD 500-year 36200.00 440.00 471.76 468.64 473.06 0.001967 10.60 4236.60 536.55 0.45
Reach1 36794 NEW 500-year 55500.00 440.00 474.34 471.52 475.95 0.001963 11.62 5631.63 543.67 0.46
Reach1 36570 State Highway 12 Bridge
Reach1 36345 2-year 6300.00 444.59 462.93 452.92 463.26 0.000893 4.71 1414.53 195.09 0.23
Reach1 36345 5-year 8500.00 444.59 464.44 454.48 464.84 0.000989 5.33 1887.78 438.98 0.25
Reach1 36345 10-year 9700.00 444.59 465.12 455.26 465.51 0.000950 5.38 2202.96 478.48 0.24
Reach1 36345 25-year 10800.00 444.59 465.70 455.94 466.07 0.000907 5.39 2486.26 506.61 0.24
Reach1 36345 50-year 11500.00 444.59 466.07 456.36 466.43 0.000863 5.34 2677.24 522.53 0.23
Reach1 36345 100-year 13000.00 444.59 466.58 457.20 466.94 0.000874 5.48 2950.47 554.85 0.24
Reach1 36345 OLD 500-year 36200.00 444.59 471.03 467.21 471.68 0.001100 7.20 5693.32 629.69 0.28
Reach1 36345 NEW 500-year 55500.00 444.59 473.41 468.75 474.34 0.001226 8.15 7206.90 640.01 0.30
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 36181 2-year 6300.00 442.61 462.79 453.56 463.08 0.001083 4.30 1473.09 248.44 0.23
Reach1 36181 5-year 8500.00 442.61 464.27 455.13 464.64 0.001276 4.95 1873.32 481.74 0.25
Reach1 36181 10-year 9700.00 442.61 464.94 455.85 465.33 0.001336 5.17 2113.22 555.28 0.26
Reach1 36181 25-year 10800.00 442.61 465.47 456.45 465.88 0.001389 5.34 2316.99 601.23 0.26
Reach1 36181 50-year 11500.00 442.61 465.81 456.85 466.23 0.001436 5.45 2460.20 655.97 0.27
Reach1 36181 100-year 13000.00 442.61 466.24 457.57 466.72 0.001580 5.85 2669.79 765.70 0.28
Reach1 36181 OLD 500-year 36200.00 442.61 471.04 467.09 471.39 0.000642 4.57 8541.23 1105.22 0.19
Reach1 36181 NEW 500-year 55500.00 442.61 473.50 468.69 473.96 0.000686 5.14 11219.25 1105.22 0.20
Reach1 36036 2-year 6300.00 436.73 462.38 450.56 462.88 0.001467 5.68 1135.43 525.26 0.25
Reach1 36036 5-year 8500.00 436.73 464.30 452.43 464.45 0.000547 3.73 3016.54 742.57 0.15
Reach1 36036 10-year 9700.00 436.73 464.98 453.37 465.13 0.000550 3.84 3375.31 834.42 0.16
Reach1 36036 25-year 10800.00 436.73 465.52 454.17 465.68 0.000542 3.88 3679.70 841.16 0.15
Reach1 36036 50-year 11500.00 436.73 465.87 454.65 466.02 0.000533 3.89 3875.34 845.52 0.15
Reach1 36036 100-year 13000.00 436.73 466.32 455.65 466.50 0.000568 4.08 4133.37 851.24 0.16
Reach1 36036 OLD 500-year 36200.00 436.73 471.07 462.70 471.27 0.000364 3.76 10160.32 1094.59 0.13
Reach1 36036 NEW 500-year 55500.00 436.73 473.53 466.34 473.83 0.000422 4.31 12853.44 1094.59 0.14
Reach1 35888 2-year 6300.00 444.73 462.29 455.35 462.61 0.001438 4.56 1380.87 390.35 0.26
Reach1 35888 5-year 8500.00 444.73 463.89 456.48 464.30 0.001642 5.19 1716.84 662.82 0.28
Reach1 35888 10-year 9700.00 444.73 464.57 457.02 464.98 0.001591 5.32 2029.44 758.86 0.28
Reach1 35888 25-year 10800.00 444.73 465.14 457.47 465.53 0.001486 5.31 2320.78 808.29 0.27
Reach1 35888 50-year 11500.00 444.73 465.51 457.75 465.89 0.001398 5.25 2522.43 826.45 0.26
Reach1 35888 100-year 13000.00 444.73 465.96 458.32 466.35 0.001427 5.43 2771.63 839.11 0.27
Reach1 35888 OLD 500-year 36200.00 444.73 470.95 466.50 471.21 0.000494 3.98 9015.56 1172.72 0.17
Reach1 35888 NEW 500-year 55500.00 444.73 473.42 467.42 473.76 0.000515 4.42 11910.79 1178.31 0.17
Reach1 35770 2-year 6300.00 440.33 462.07 451.49 462.44 0.001352 4.92 1336.79 451.67 0.25
Reach1 35770 5-year 8500.00 440.33 463.71 453.02 464.12 0.001387 5.41 1810.90 689.64 0.25
Reach1 35770 10-year 9700.00 440.33 464.41 453.79 464.80 0.001294 5.39 2136.27 741.12 0.25
Reach1 35770 25-year 10800.00 440.33 464.99 454.47 465.36 0.001198 5.33 2412.76 749.78 0.24
Reach1 35770 50-year 11500.00 440.33 465.37 454.88 465.72 0.001128 5.25 2593.70 755.99 0.23
Reach1 35770 100-year 13000.00 440.33 465.81 455.74 466.19 0.001167 5.44 2806.05 765.20 0.24
Reach1 35770 OLD 500-year 36200.00 440.33 470.88 466.08 471.16 0.000453 4.06 8643.97 1085.64 0.16
Reach1 35770 NEW 500-year 55500.00 440.33 473.32 467.17 473.70 0.000496 4.57 11293.55 1086.33 0.17
Reach1 35681 2-year 6300.00 440.48 461.97 450.59 462.32 0.001167 4.76 1331.26 504.25 0.23
Reach1 35681 5-year 8500.00 440.48 463.79 452.20 463.98 0.000560 3.60 2462.25 759.71 0.16
Reach1 35681 10-year 9700.00 440.48 464.48 452.99 464.67 0.000523 3.58 2805.42 775.55 0.16
Reach1 35681 25-year 10800.00 440.48 465.05 453.68 465.24 0.000498 3.58 3090.53 784.18 0.16
Reach1 35681 50-year 11500.00 440.48 465.42 454.08 465.61 0.000479 3.56 3277.73 790.27 0.15
Reach1 35681 100-year 13000.00 440.48 465.95 454.93 466.06 0.000286 2.81 4726.50 805.72 0.12
Reach1 35681 OLD 500-year 36200.00 440.48 470.87 464.36 471.11 0.000310 3.47 9286.95 1179.25 0.13
Reach1 35681 NEW 500-year 55500.00 440.48 473.32 465.88 473.65 0.000357 4.00 12370.53 1291.53 0.14
Reach1 35504 2-year 6300.00 437.27 461.83 447.98 462.12 0.000931 4.34 1451.52 592.11 0.21
Reach1 35504 5-year 8500.00 437.27 463.75 449.70 463.87 0.000378 2.94 3015.55 768.71 0.13
Reach1 35504 10-year 9700.00 437.27 464.45 450.56 464.58 0.000349 2.91 3368.34 783.96 0.13
Reach1 35504 25-year 10800.00 437.27 465.01 451.32 465.15 0.000332 2.90 3660.67 793.02 0.13
Reach1 35504 50-year 11500.00 437.27 465.38 451.78 465.53 0.000318 2.89 3852.31 797.98 0.12
Reach1 35504 100-year 13000.00 437.27 465.84 452.77 466.00 0.000334 3.01 4089.78 803.13 0.13
Reach1 35504 OLD 500-year 36200.00 437.27 470.83 463.15 471.06 0.000242 3.04 9867.18 1470.89 0.11
Reach1 35504 NEW 500-year 55500.00 437.27 473.28 465.00 473.59 0.000273 3.46 13361.08 1555.66 0.12
Reach1 35278 2-year 6300.00 441.09 461.60 449.59 461.91 0.000914 4.47 1419.08 642.56 0.21
Reach1 35278 5-year 8500.00 441.09 463.68 451.04 463.80 0.000308 2.84 3099.17 729.36 0.12
Reach1 35278 10-year 9700.00 441.09 464.38 451.79 464.50 0.000291 2.83 3430.93 740.69 0.12
Reach1 35278 25-year 10800.00 441.09 464.95 452.44 465.08 0.000283 2.85 3705.89 749.81 0.12
Reach1 35278 50-year 11500.00 441.09 465.32 452.85 465.46 0.000275 2.85 3887.48 756.11 0.12
Reach1 35278 100-year 13000.00 441.09 465.78 453.67 465.93 0.000294 3.00 4111.14 764.14 0.12
Reach1 35278 OLD 500-year 36200.00 441.09 470.80 463.38 471.00 0.000231 3.11 10631.12 1668.77 0.11
Reach1 35278 NEW 500-year 55500.00 441.09 473.25 464.67 473.51 0.000250 3.45 14340.40 1747.58 0.12
Reach1 35215 2-year 6300.00 442.16 461.51 450.04 461.85 0.001092 4.67 1353.77 625.59 0.22
Reach1 35215 5-year 8500.00 442.16 463.26 451.52 463.73 0.001297 5.51 1563.74 699.50 0.25
Reach1 35215 10-year 9700.00 442.16 464.35 452.27 464.49 0.000348 2.99 3253.34 732.29 0.13
Reach1 35215 25-year 10800.00 442.16 464.92 452.89 465.07 0.000334 2.99 3523.78 740.96 0.13
Reach1 35215 50-year 11500.00 442.16 465.29 453.31 465.44 0.000324 2.99 3702.27 746.48 0.13
Reach1 35215 100-year 13000.00 442.16 465.74 454.16 465.92 0.000344 3.13 3920.08 753.51 0.13
Reach1 35215 OLD 500-year 36200.00 442.16 470.78 463.67 470.98 0.000260 3.21 10368.93 1693.71 0.12
Reach1 35215 NEW 500-year 55500.00 442.16 473.23 464.97 473.50 0.000274 3.52 14109.16 1726.90 0.12
Reach1 35090 2-year 6300.00 441.28 461.46 449.95 461.71 0.000693 4.02 1555.57 361.18 0.18
Reach1 35090 5-year 8500.00 441.28 463.43 451.42 463.56 0.000289 2.82 3012.55 661.69 0.12
Reach1 35090 10-year 9700.00 441.28 464.31 452.16 464.44 0.000275 2.85 3382.24 694.02 0.12
Reach1 35090 25-year 10800.00 441.28 464.88 452.80 465.02 0.000273 2.90 3631.67 705.62 0.12
Reach1 35090 50-year 11500.00 441.28 465.26 453.21 465.40 0.000271 2.92 3797.35 715.23 0.12
Reach1 35090 100-year 13000.00 441.28 465.70 454.09 465.87 0.000293 3.09 3998.08 721.61 0.12
Reach1 35090 OLD 500-year 36200.00 441.28 470.72 463.17 470.95 0.000259 3.39 9801.53 1645.59 0.12
Reach1 35090 NEW 500-year 55500.00 441.28 473.14 464.48 473.46 0.000296 3.86 13482.12 1824.40 0.13
Reach1 34892 2-year 6300.00 438.33 461.36 448.46 461.57 0.000623 3.65 1724.66 282.79 0.17
Reach1 34892 5-year 8500.00 438.33 463.34 449.83 463.49 0.000431 3.11 2746.83 613.72 0.14
Reach1 34892 10-year 9700.00 438.33 464.21 450.51 464.37 0.000424 3.09 3047.16 633.13 0.14
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 34892 25-year 10800.00 438.33 464.78 451.09 464.95 0.000435 3.16 3245.04 643.47 0.14
Reach1 34892 50-year 11500.00 438.33 465.15 451.45 465.33 0.000436 3.20 3375.95 649.52 0.15
Reach1 34892 100-year 13000.00 438.33 465.58 452.19 465.79 0.000481 3.42 3532.43 667.99 0.15
Reach1 34892 OLD 500-year 36200.00 438.33 470.61 462.38 470.88 0.000361 3.58 9021.71 1481.79 0.14
Reach1 34892 NEW 500-year 55500.00 438.33 473.00 464.53 473.38 0.000425 4.18 12268.95 1759.72 0.15
Reach1 34676 2-year 6300.00 439.79 461.06 448.58 461.39 0.001053 4.57 1387.60 206.29 0.22
Reach1 34676 5-year 8500.00 439.79 462.88 450.21 463.31 0.001205 5.32 1697.73 593.55 0.24
Reach1 34676 10-year 9700.00 439.79 463.75 451.03 464.19 0.001202 5.51 1966.03 742.90 0.24
Reach1 34676 25-year 10800.00 439.79 464.57 451.74 464.82 0.000753 4.50 2934.13 847.38 0.19
Reach1 34676 50-year 11500.00 439.79 464.97 452.19 465.21 0.000697 4.40 3211.74 919.81 0.19
Reach1 34676 100-year 13000.00 439.79 465.42 453.12 465.67 0.000703 4.50 3541.05 961.33 0.19
Reach1 34676 OLD 500-year 36200.00 439.79 470.57 465.26 470.78 0.000519 4.57 10296.68 1508.84 0.17
Reach1 34676 NEW 500-year 55500.00 439.79 473.01 466.62 473.25 0.000529 4.93 14413.00 1702.58 0.17
Reach1 34638 2-year 6300.00 439.87 460.98 448.66 461.33 0.001184 4.78 1318.00 179.72 0.23
Reach1 34638 5-year 8500.00 439.87 462.80 450.32 463.25 0.001330 5.51 1790.22 578.60 0.25
Reach1 34638 10-year 9700.00 439.87 463.70 451.12 464.15 0.001266 5.58 2281.58 743.66 0.24
Reach1 34638 25-year 10800.00 439.87 464.29 451.88 464.73 0.001256 5.69 2642.42 815.81 0.24
Reach1 34638 50-year 11500.00 439.87 464.69 452.32 465.12 0.001211 5.68 2910.46 867.72 0.24
Reach1 34638 100-year 13000.00 439.87 465.10 453.27 465.57 0.001311 6.00 3200.94 944.85 0.25
Reach1 34638 OLD 500-year 36200.00 439.87 470.33 466.09 470.71 0.001078 6.46 9108.12 1469.33 0.24
Reach1 34638 NEW 500-year 55500.00 439.87 472.73 467.48 473.17 0.001113 7.02 13724.06 1691.79 0.25
Reach1 34593 Bridge
Reach1 34585 2-year 6300.00 439.53 460.93 448.42 461.25 0.001169 4.54 1391.79 281.55 0.23
Reach1 34585 5-year 8500.00 439.53 462.60 450.09 463.00 0.001428 5.13 1921.44 593.98 0.25
Reach1 34585 10-year 9700.00 439.53 463.53 450.91 463.89 0.001258 5.05 2459.36 803.47 0.24
Reach1 34585 25-year 10800.00 439.53 464.15 451.69 464.49 0.001183 5.05 2888.78 897.58 0.24
Reach1 34585 50-year 11500.00 439.53 464.58 452.15 464.90 0.001091 4.95 3207.72 934.91 0.23
Reach1 34585 100-year 13000.00 439.53 465.02 453.12 465.35 0.001142 5.16 3539.91 990.85 0.23
Reach1 34585 OLD 500-year 36200.00 439.53 470.30 465.41 470.58 0.000562 4.42 9907.28 1556.04 0.17
Reach1 34585 NEW 500-year 55500.00 439.53 472.67 466.33 473.03 0.000581 4.84 14640.37 1774.95 0.18
Reach1 34458 2-year 6300.00 436.22 460.72 449.23 461.08 0.001339 4.83 1305.04 146.91 0.24
Reach1 34458 5-year 8500.00 436.22 462.30 451.06 462.77 0.001683 5.62 1626.21 480.62 0.27
Reach1 34458 10-year 9700.00 436.22 463.28 451.95 463.70 0.001434 5.44 2111.54 738.67 0.25
Reach1 34458 25-year 10800.00 436.22 463.95 452.72 464.33 0.001282 5.30 2536.95 867.45 0.24
Reach1 34458 50-year 11500.00 436.22 464.41 453.18 464.75 0.001170 5.17 2863.40 903.61 0.23
Reach1 34458 100-year 13000.00 436.22 464.85 454.15 465.20 0.001172 5.27 3193.79 953.32 0.23
Reach1 34458 OLD 500-year 36200.00 436.22 470.24 465.31 470.50 0.000553 4.41 9504.15 1534.69 0.17
Reach1 34458 NEW 500-year 55500.00 436.22 472.60 466.28 472.96 0.000584 4.86 14192.10 1773.70 0.18
Reach1 34218 2-year 6300.00 442.28 460.48 450.61 460.78 0.001026 4.41 1470.10 205.41 0.22
Reach1 34218 5-year 8500.00 442.28 462.06 452.05 462.42 0.001136 4.98 1899.26 535.80 0.23
Reach1 34218 10-year 9800.00 442.28 463.09 452.79 463.41 0.000981 4.83 2478.96 779.23 0.22
Reach1 34218 25-year 10800.00 442.28 463.81 453.34 464.08 0.000843 4.60 2974.93 912.31 0.20
Reach1 34218 50-year 11600.00 442.28 464.27 453.78 464.52 0.000794 4.55 3351.03 999.20 0.20
Reach1 34218 100-year 13000.00 442.28 464.72 454.50 464.98 0.000784 4.60 3737.70 1042.36 0.20
Reach1 34218 OLD 500-year 36200.00 442.28 470.20 464.75 470.41 0.000389 3.92 10712.77 1582.71 0.15
Reach1 34218 NEW 500-year 55500.00 442.28 472.56 465.84 472.86 0.000431 4.42 13627.91 1702.97 0.16
Reach1 34141 2-year 6300.00 442.19 460.50 450.71 460.68 0.000692 3.77 2085.51 434.08 0.18
Reach1 34141 5-year 8500.00 442.19 462.13 452.18 462.30 0.000595 3.73 2925.34 615.89 0.17
Reach1 34141 10-year 9800.00 442.19 463.16 453.04 463.31 0.000481 3.47 3593.31 713.34 0.15
Reach1 34141 25-year 10800.00 442.19 463.85 453.68 463.99 0.000459 3.47 4218.06 1008.07 0.15
Reach1 34141 50-year 11600.00 442.19 464.31 454.14 464.44 0.000421 3.38 4699.47 1055.89 0.15
Reach1 34141 100-year 13000.00 442.19 464.77 454.98 464.90 0.000412 3.41 5189.44 1093.93 0.15
Reach1 34141 OLD 500-year 36200.00 442.19 470.20 462.71 470.38 0.000289 3.43 11845.34 1691.53 0.13
Reach1 34141 NEW 500-year 55500.00 442.19 472.56 464.88 472.82 0.000316 3.83 16341.41 1767.03 0.14
Reach1 34064 2-year 6300.00 441.97 460.42 451.21 460.63 0.000899 4.04 1861.41 434.49 0.20
Reach1 34064 5-year 8500.00 441.97 462.08 452.77 462.27 0.000681 3.77 2717.50 600.01 0.18
Reach1 34064 10-year 9800.00 441.97 463.12 453.75 463.28 0.000533 3.46 3396.79 702.34 0.16
Reach1 34064 25-year 10800.00 441.97 463.82 454.52 463.96 0.000522 3.52 4009.31 1050.38 0.16
Reach1 34064 50-year 11600.00 441.97 464.29 455.04 464.42 0.000468 3.40 4518.53 1103.80 0.15
Reach1 34064 100-year 13000.00 441.97 464.75 455.89 464.88 0.000448 3.39 5033.84 1146.55 0.15
Reach1 34064 OLD 500-year 36200.00 441.97 470.19 462.75 470.37 0.000301 3.38 11952.56 1703.79 0.13
Reach1 34064 NEW 500-year 55500.00 441.97 472.55 465.03 472.81 0.000331 3.80 16365.17 1797.48 0.14
Reach1 33970 2-year 6300.00 440.60 460.22 451.54 460.53 0.001177 4.78 1539.45 475.08 0.23
Reach1 33970 5-year 8500.00 440.60 461.86 453.35 462.18 0.001062 4.81 2067.59 568.03 0.22
Reach1 33970 10-year 9800.00 440.60 462.89 454.33 463.20 0.000939 4.66 2460.91 649.26 0.21
Reach1 33970 25-year 10800.00 440.60 463.58 455.11 463.89 0.000941 4.74 2828.39 859.75 0.21
Reach1 33970 50-year 11600.00 440.60 464.04 455.74 464.34 0.001073 5.07 3173.10 1127.39 0.22
Reach1 33970 100-year 13000.00 440.60 464.48 458.89 464.80 0.001212 5.49 3573.23 1194.38 0.24
Reach1 33970 OLD 500-year 36200.00 440.60 470.17 463.96 470.34 0.000279 3.20 12216.47 1709.91 0.12
Reach1 33970 NEW 500-year 55500.00 440.60 472.53 465.18 472.78 0.000310 3.60 16689.06 1737.76 0.13
Reach1 33852 2-year 6300.00 439.65 460.23 451.47 460.36 0.000795 2.82 2170.68 639.67 0.18
Reach1 33852 5-year 8500.00 439.65 461.89 453.07 462.03 0.000585 2.60 2906.03 704.15 0.16
Reach1 33852 10-year 9800.00 439.65 462.93 454.03 463.08 0.000478 2.44 3410.43 793.35 0.14
Reach1 33852 25-year 10800.00 439.65 463.62 454.58 463.77 0.000430 2.36 3821.13 934.20 0.14
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 33852 50-year 11600.00 439.65 464.07 455.01 464.23 0.000399 2.35 4154.74 1072.86 0.13
Reach1 33852 100-year 13000.00 439.65 464.51 455.69 464.68 0.000408 2.44 4529.42 1170.98 0.14
Reach1 33852 OLD 500-year 36200.00 439.65 470.17 461.09 470.31 0.000180 2.18 13203.44 2035.96 0.10
Reach1 33852 NEW 500-year 55500.00 439.65 472.59 464.55 472.72 0.000201 2.54 19442.38 2334.76 0.11
Reach1 33766 2-year 6300.00 438.85 460.09 449.35 460.29 0.000738 3.75 1783.71 516.37 0.18
Reach1 33766 5-year 8500.00 438.85 461.77 450.91 461.98 0.000623 3.71 2343.76 638.54 0.17
Reach1 33766 10-year 9800.00 438.85 462.83 451.75 463.03 0.000517 3.54 2793.04 774.58 0.16
Reach1 33766 25-year 10800.00 438.85 463.53 452.35 463.73 0.000462 3.44 3172.75 861.29 0.15
Reach1 33766 50-year 11600.00 438.85 463.98 452.82 464.19 0.000446 3.45 3477.40 1079.31 0.15
Reach1 33766 100-year 13000.00 438.85 464.42 453.58 464.64 0.000455 3.54 3827.41 1121.88 0.15
Reach1 33766 OLD 500-year 36200.00 438.85 470.15 462.27 470.29 0.000168 2.60 12206.58 2193.30 0.10
Reach1 33766 NEW 500-year 55500.00 438.85 472.55 465.04 472.70 0.000189 2.94 18398.65 2333.41 0.10
Reach1 33696 2-year 6300.00 439.61 460.11 449.01 460.23 0.000382 2.87 2333.75 635.15 0.14
Reach1 33696 5-year 8500.00 439.61 461.79 450.36 461.92 0.000341 2.93 2977.53 711.55 0.13
Reach1 33696 10-year 9800.00 439.61 462.85 451.05 462.98 0.000302 2.89 3467.93 850.27 0.13
Reach1 33696 25-year 10800.00 439.61 463.55 451.54 463.68 0.000291 2.91 3875.58 983.94 0.12
Reach1 33696 50-year 11600.00 439.61 464.00 451.92 464.14 0.000284 2.92 4199.24 1094.56 0.12
Reach1 33696 100-year 13000.00 439.61 464.44 452.57 464.58 0.000293 3.02 4535.52 1134.47 0.13
Reach1 33696 OLD 500-year 36200.00 439.61 470.15 460.72 470.27 0.000147 2.57 13108.58 2325.39 0.09
Reach1 33696 NEW 500-year 55500.00 439.61 472.55 463.08 472.68 0.000169 2.93 19639.57 2719.87 0.10
Reach1 33580 2-year 6300.00 439.59 460.07 448.86 460.18 0.000407 2.76 2417.95 684.78 0.14
Reach1 33580 5-year 8500.00 439.59 461.76 450.20 461.87 0.000352 2.77 3116.90 728.05 0.13
Reach1 33580 10-year 9800.00 439.59 462.82 451.14 462.94 0.000306 2.69 3608.47 836.51 0.12
Reach1 33580 25-year 10800.00 439.59 463.52 451.61 463.64 0.000284 2.68 4005.55 964.35 0.12
Reach1 33580 50-year 11600.00 439.59 463.98 451.98 464.10 0.000278 2.70 4312.72 1055.90 0.12
Reach1 33580 100-year 13000.00 439.59 464.47 452.63 464.54 0.000147 2.00 6438.28 1121.18 0.09
Reach1 33580 OLD 500-year 36200.00 439.59 470.14 460.62 470.26 0.000160 2.55 13662.00 1773.53 0.10
Reach1 33580 NEW 500-year 55500.00 439.59 472.50 462.51 472.66 0.000198 3.04 17192.90 1773.53 0.11
Reach1 33400 2-year 6300.00 436.41 459.96 446.91 460.10 0.000508 3.11 2150.17 638.68 0.15
Reach1 33400 5-year 8500.00 436.41 461.66 448.48 461.81 0.000435 3.10 2776.59 677.91 0.15
Reach1 33400 10-year 9800.00 436.41 462.74 449.35 462.89 0.000376 3.01 3180.45 696.84 0.14
Reach1 33400 25-year 10800.00 436.41 463.44 449.96 463.59 0.000352 2.99 3463.67 783.73 0.13
Reach1 33400 50-year 11600.00 436.41 463.89 450.40 464.05 0.000346 3.00 3694.45 886.21 0.13
Reach1 33400 100-year 13000.00 436.41 464.43 451.18 464.51 0.000173 2.11 5761.66 935.10 0.09
Reach1 33400 OLD 500-year 36200.00 436.41 470.05 460.98 470.22 0.000192 2.72 11257.16 1509.69 0.10
Reach1 33400 NEW 500-year 55500.00 436.41 472.42 462.98 472.62 0.000235 3.23 15398.64 1758.17 0.12
Reach1 33326 2-year 6300.00 434.89 459.92 446.35 460.07 0.000488 3.18 2170.57 645.54 0.15
Reach1 33326 5-year 8500.00 434.89 461.63 448.11 461.78 0.000431 3.20 2778.39 689.68 0.14
Reach1 33326 10-year 9800.00 434.89 462.71 449.06 462.86 0.000379 3.11 3173.16 710.42 0.14
Reach1 33326 25-year 10800.00 434.89 463.41 449.73 463.57 0.000355 3.10 3440.91 745.28 0.13
Reach1 33326 50-year 11600.00 434.89 463.86 450.23 464.03 0.000349 3.13 3626.00 770.56 0.13
Reach1 33326 100-year 13000.00 434.89 464.29 451.07 464.48 0.000379 3.31 3810.73 808.46 0.14
Reach1 33326 OLD 500-year 36200.00 434.89 470.01 460.97 470.20 0.000203 2.92 10511.47 1469.26 0.11
Reach1 33326 NEW 500-year 55500.00 434.89 472.37 463.03 472.60 0.000244 3.41 14625.14 1734.07 0.12
Reach1 33164 2-year 6300.00 431.98 459.78 444.70 460.01 0.000223 3.92 1998.29 646.59 0.16
Reach1 33164 5-year 8500.00 431.98 461.46 446.41 461.71 0.000268 4.38 2622.05 710.20 0.18
Reach1 33164 10-year 9800.00 431.98 462.54 447.31 462.80 0.000262 4.49 3050.77 747.24 0.18
Reach1 33164 25-year 10800.00 431.98 463.25 447.96 463.51 0.000262 4.60 3339.96 764.59 0.18
Reach1 33164 50-year 11600.00 431.98 463.70 448.49 463.97 0.000268 4.73 3530.31 779.91 0.18
Reach1 33164 100-year 13000.00 431.98 464.30 449.32 464.43 0.000148 3.58 5602.70 817.79 0.14
Reach1 33164 OLD 500-year 36200.00 431.98 469.94 462.11 470.17 0.000207 4.93 10351.67 1086.91 0.17
Reach1 33164 NEW 500-year 55500.00 431.98 472.19 464.10 472.55 0.000290 6.16 13080.47 1355.01 0.20
Reach1 33108 2-year 6300.00 432.66 459.81 444.91 459.95 0.000436 3.22 2403.66 656.43 0.14
Reach1 33108 5-year 8500.00 432.66 461.51 446.57 461.63 0.000336 3.03 3601.49 748.18 0.13
Reach1 33108 10-year 9800.00 432.66 462.61 447.45 462.70 0.000263 2.80 4441.62 776.27 0.12
Reach1 33108 25-year 10800.00 432.66 463.32 448.12 463.41 0.000232 2.69 4995.95 783.12 0.11
Reach1 33108 50-year 11600.00 432.66 463.78 448.64 463.86 0.000220 2.66 5355.66 787.29 0.11
Reach1 33108 100-year 13000.00 432.66 464.31 449.48 464.40 0.000222 2.73 5773.24 791.90 0.11
Reach1 33108 OLD 500-year 36200.00 432.66 469.94 461.43 470.14 0.000287 3.66 10871.15 1145.56 0.13
Reach1 33108 NEW 500-year 55500.00 432.66 472.21 462.92 472.49 0.000383 4.47 14071.76 1527.00 0.15
Reach1 33100 Bridge
Reach1 33087 2-year 6300.00 432.93 459.78 445.09 459.93 0.000440 3.24 2333.69 688.02 0.15
Reach1 33087 5-year 8500.00 432.93 461.49 446.73 461.61 0.000340 3.05 3590.29 768.02 0.13
Reach1 33087 10-year 9800.00 432.93 462.60 447.65 462.69 0.000266 2.81 4455.45 787.02 0.12
Reach1 33087 25-year 10800.00 432.93 463.31 448.30 463.40 0.000235 2.71 5016.40 793.02 0.11
Reach1 33087 50-year 11600.00 432.93 463.77 448.80 463.85 0.000223 2.68 5379.30 796.91 0.11
Reach1 33087 100-year 13000.00 432.93 464.29 449.58 464.39 0.000226 2.75 5799.96 801.58 0.11
Reach1 33087 OLD 500-year 36200.00 432.93 469.89 461.45 470.10 0.000299 3.74 10432.52 1238.27 0.13
Reach1 33087 NEW 500-year 55500.00 432.93 472.09 462.95 472.42 0.000411 4.63 13301.16 1535.98 0.15
Reach1 32897 2-year 6300.00 435.99 459.56 446.25 459.80 0.000642 4.01 1894.85 225.94 0.17
Reach1 32897 5-year 8600.00 435.99 461.10 447.98 461.44 0.000836 4.86 2291.72 324.89 0.20
Reach1 32897 10-year 9900.00 435.99 462.17 448.89 462.53 0.000848 5.08 2781.56 594.62 0.21
Reach1 32897 25-year 11000.00 435.99 462.88 449.61 463.24 0.000839 5.18 3242.74 688.05 0.21
Reach1 32897 50-year 11800.00 435.99 463.35 450.09 463.70 0.000822 5.21 3570.51 705.09 0.20
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 32897 100-year 13000.00 435.99 463.88 450.77 464.23 0.000827 5.32 3951.38 719.06 0.21
Reach1 32897 OLD 500-year 36200.00 435.99 469.49 463.98 469.93 0.001023 6.95 8214.58 1002.28 0.24
Reach1 32897 NEW 500-year 55500.00 435.99 471.59 466.03 472.20 0.001333 8.35 10590.11 1010.23 0.28
Reach1 32586 2-year 6300.00 440.46 458.99 449.53 459.46 0.001810 5.52 1140.73 95.43 0.28
Reach1 32586 5-year 8600.00 440.46 460.26 451.18 460.98 0.002693 6.77 1285.42 170.26 0.35
Reach1 32586 10-year 9900.00 440.46 461.27 452.03 462.05 0.002778 7.13 1490.35 233.84 0.35
Reach1 32586 25-year 11000.00 440.46 461.90 452.71 462.75 0.002854 7.47 1680.54 379.17 0.36
Reach1 32586 50-year 11800.00 440.46 462.33 453.18 463.22 0.002871 7.65 1873.23 512.91 0.37
Reach1 32586 100-year 13000.00 440.46 462.82 453.89 463.74 0.002941 7.93 2160.43 625.95 0.37
Reach1 32586 OLD 500-year 36200.00 440.46 468.72 465.53 469.47 0.002305 8.86 7272.64 1035.52 0.35
Reach1 32586 NEW 500-year 55500.00 440.46 470.64 467.27 471.61 0.002947 10.65 9692.82 1441.24 0.40
Reach1 32479 2-year 6300.00 439.83 458.91 448.44 459.24 0.001494 4.64 1401.94 162.11 0.26
Reach1 32479 5-year 8600.00 439.83 460.18 450.06 460.65 0.002064 5.54 1637.77 212.04 0.31
Reach1 32479 10-year 9900.00 439.83 461.21 450.90 461.72 0.001960 5.76 1869.07 237.03 0.30
Reach1 32479 25-year 11000.00 439.83 461.86 451.60 462.41 0.002002 6.04 2058.43 365.38 0.31
Reach1 32479 50-year 11800.00 439.83 462.29 452.06 462.87 0.002018 6.21 2252.38 525.62 0.31
Reach1 32479 100-year 13000.00 439.83 462.77 452.75 463.38 0.002072 6.46 2546.38 646.05 0.32
Reach1 32479 OLD 500-year 36200.00 439.83 468.59 464.56 469.23 0.001871 7.88 7725.02 1030.79 0.32
Reach1 32479 NEW 500-year 55500.00 439.83 470.42 466.51 471.32 0.002532 9.76 10147.07 1562.80 0.38
Reach1 32231 2-year 6300.00 431.72 458.82 458.99 0.000520 3.38 1863.68 130.76 0.16
Reach1 32231 5-year 8600.00 431.72 460.02 460.30 0.000790 4.24 2035.16 155.74 0.20
Reach1 32231 10-year 9900.00 431.72 461.03 461.35 0.000863 4.55 2201.88 169.33 0.21
Reach1 32231 25-year 11000.00 431.72 461.66 462.03 0.000925 4.84 2309.51 172.30 0.22
Reach1 32231 50-year 11800.00 431.72 462.08 462.48 0.000972 5.05 2393.05 308.58 0.22
Reach1 32231 100-year 13000.00 431.72 462.53 462.97 0.001061 5.37 2538.30 338.56 0.23
Reach1 32231 OLD 500-year 36200.00 431.72 468.35 468.79 0.001030 6.47 8076.77 1856.98 0.24
Reach1 32231 NEW 500-year 55500.00 431.72 470.23 470.72 0.001177 7.29 11718.72 2013.23 0.26
Reach1 32105 2-year 6300.00 434.88 458.49 448.70 458.86 0.001694 4.94 1275.56 120.08 0.27
Reach1 32105 5-year 8600.00 434.88 459.52 450.80 460.10 0.002582 6.11 1411.44 166.83 0.33
Reach1 32105 10-year 9900.00 434.88 460.51 452.23 461.15 0.002725 6.38 1621.22 291.73 0.34
Reach1 32105 25-year 11000.00 434.88 461.13 453.07 461.80 0.002987 6.64 1831.29 383.51 0.36
Reach1 32105 50-year 11800.00 434.88 461.55 453.57 462.24 0.003141 6.77 2000.97 422.81 0.37
Reach1 32105 100-year 13000.00 434.88 461.97 454.14 462.72 0.003463 7.07 2189.88 469.31 0.39
Reach1 32105 OLD 500-year 36200.00 434.88 467.29 464.10 468.49 0.004059 10.00 5919.53 1569.13 0.45
Reach1 32105 NEW 500-year 55500.00 434.88 468.66 466.29 470.34 0.005672 12.52 9182.26 1856.30 0.54
Reach1 31949 2-year 6300.00 438.19 458.38 458.66 0.000850 2.82 1584.70 291.54 0.17
Reach1 31949 5-year 8600.00 438.19 459.45 459.82 0.000921 3.02 1916.18 322.68 0.18
Reach1 31949 10-year 9900.00 438.19 460.52 460.87 0.000743 2.79 2274.91 350.99 0.16
Reach1 31949 25-year 11000.00 438.19 461.16 461.51 0.000701 2.74 2508.95 391.27 0.16
Reach1 31949 50-year 11800.00 438.19 461.59 461.95 0.000671 2.74 2685.66 419.42 0.16
Reach1 31949 100-year 13000.00 438.19 462.03 462.41 0.000682 2.81 2873.98 445.42 0.16
Reach1 31949 OLD 500-year 36200.00 438.19 467.52 468.08 0.000759 3.85 6733.67 1263.79 0.18
Reach1 31949 NEW 500-year 55500.00 438.19 469.09 469.77 0.001074 4.91 9083.59 1698.96 0.22
Reach1 31797 2-year 6300.00 437.25 458.46 458.54 0.000266 1.97 2732.87 441.78 0.11
Reach1 31797 5-year 8600.00 437.25 459.56 459.68 0.000296 2.16 3232.65 461.46 0.11
Reach1 31797 10-year 9900.00 437.25 460.63 460.75 0.000252 2.06 3733.43 479.33 0.10
Reach1 31797 25-year 11000.00 437.25 461.27 461.39 0.000243 2.06 4044.48 488.95 0.10
Reach1 31797 50-year 11800.00 437.25 461.71 461.84 0.000238 2.07 4259.03 495.47 0.10
Reach1 31797 100-year 13000.00 437.25 462.15 462.29 0.000247 2.13 4480.15 502.04 0.11
Reach1 31797 OLD 500-year 36200.00 437.25 467.64 467.93 0.000375 3.32 8618.57 1285.23 0.14
Reach1 31797 NEW 500-year 55500.00 437.25 469.18 469.59 0.000594 4.41 11032.13 1822.36 0.18
Reach1 31660 2-year 6300.00 434.07 457.94 447.73 458.43 0.001640 5.69 1321.17 429.56 0.27
Reach1 31660 5-year 8600.00 434.07 458.74 449.67 459.52 0.002545 7.26 1437.74 440.90 0.34
Reach1 31660 10-year 9900.00 434.07 459.71 450.65 460.59 0.002725 7.73 1582.49 453.97 0.35
Reach1 31660 25-year 11000.00 434.07 460.24 451.44 461.23 0.003010 8.24 1662.00 461.61 0.37
Reach1 31660 50-year 11800.00 434.07 460.58 451.99 461.66 0.003222 8.61 1715.07 466.88 0.39
Reach1 31660 100-year 13000.00 434.07 460.84 452.78 462.09 0.003709 9.30 1754.96 471.44 0.42
Reach1 31660 OLD 500-year 36200.00 434.07 467.48 461.99 467.87 0.000363 3.59 7578.84 614.76 0.14
Reach1 31660 NEW 500-year 55500.00 434.07 468.71 461.99 469.47 0.000638 4.94 8419.68 710.96 0.18
Reach1 31611 2-year 6300.00 434.21 457.90 447.48 458.34 0.001467 5.44 1389.76 433.24 0.26
Reach1 31611 5-year 8600.00 434.21 459.18 449.36 459.28 0.000279 2.47 3312.77 459.41 0.11
Reach1 31611 10-year 9900.00 434.21 460.22 450.30 460.32 0.000243 2.37 3795.54 471.47 0.11
Reach1 31611 25-year 11000.00 434.21 460.82 451.09 460.93 0.000241 2.40 4080.71 481.16 0.11
Reach1 31611 50-year 11800.00 434.21 461.22 451.63 461.34 0.000241 2.42 4275.74 487.64 0.11
Reach1 31611 100-year 13000.00 434.21 461.59 452.51 461.72 0.000258 2.53 4456.88 493.05 0.11
Reach1 31611 OLD 500-year 36200.00 434.21 467.47 458.55 467.84 0.000364 3.62 7748.26 660.47 0.14
Reach1 31611 NEW 500-year 55500.00 434.21 468.70 459.61 469.42 0.000630 4.94 8625.56 733.27 0.18
Reach1 31376 2-year 6300.00 435.04 458.08 446.50 458.14 0.000170 2.03 3193.59 474.20 0.09
Reach1 31376 5-year 8600.00 435.04 459.15 448.17 459.23 0.000200 2.28 3704.96 484.22 0.10
Reach1 31376 10-year 9900.00 435.04 460.19 449.06 460.28 0.000177 2.21 4215.81 494.22 0.09
Reach1 31376 25-year 11000.00 435.04 460.79 449.77 460.88 0.000177 2.25 4514.15 500.62 0.09
Reach1 31376 50-year 11800.00 435.04 461.19 450.26 461.29 0.000177 2.27 4716.80 504.79 0.09
Reach1 31376 100-year 13000.00 435.04 461.56 450.98 461.67 0.000190 2.38 4903.13 508.11 0.10
Reach1 31376 OLD 500-year 36200.00 435.04 467.46 457.12 467.76 0.000275 3.36 8752.17 723.62 0.12
Reach1 31376 NEW 500-year 55500.00 435.04 468.69 458.90 469.26 0.000483 4.60 9680.24 767.85 0.16
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 31216 2-year 6300.00 438.56 458.04 448.48 458.11 0.000228 2.11 3033.19 453.77 0.10
Reach1 31216 5-year 8600.00 438.56 459.10 450.36 459.19 0.000262 2.35 3517.73 462.44 0.11
Reach1 31216 10-year 9900.00 438.56 460.15 451.37 460.24 0.000226 2.26 4008.63 473.76 0.10
Reach1 31216 25-year 11000.00 438.56 460.74 452.10 460.85 0.000224 2.29 4294.55 481.11 0.10
Reach1 31216 50-year 11800.00 438.56 461.15 454.44 461.26 0.000223 2.31 4489.14 486.49 0.10
Reach1 31216 100-year 13000.00 438.56 461.51 454.64 461.63 0.000239 2.42 4667.06 492.00 0.11
Reach1 31216 OLD 500-year 36200.00 438.56 467.43 457.26 467.70 0.000296 3.17 9273.22 875.85 0.13
Reach1 31216 NEW 500-year 55500.00 438.56 468.65 459.09 469.16 0.000504 4.31 10350.90 885.24 0.17
Reach1 31105 2-year 6300.00 436.82 458.01 448.11 458.08 0.000266 2.35 2866.30 512.66 0.11
Reach1 31105 5-year 8600.00 436.82 459.07 449.91 459.17 0.000296 2.57 3430.15 550.68 0.12
Reach1 31105 10-year 9900.00 436.82 460.12 450.84 460.22 0.000247 2.43 4030.65 583.80 0.11
Reach1 31105 25-year 11000.00 436.82 460.73 451.57 460.83 0.000248 2.47 4390.63 617.19 0.11
Reach1 31105 50-year 11800.00 436.82 461.13 454.62 461.24 0.000242 2.47 4645.15 638.83 0.11
Reach1 31105 100-year 13000.00 436.82 461.50 454.84 461.61 0.000254 2.54 4881.62 658.53 0.11
Reach1 31105 OLD 500-year 36200.00 436.82 467.46 457.83 467.66 0.000238 2.90 10558.19 1015.43 0.11
Reach1 31105 NEW 500-year 55500.00 436.82 468.71 459.80 469.08 0.000394 3.89 11830.56 1015.64 0.14
Reach1 30779 2-year 6300.00 430.52 457.83 443.92 457.97 0.000421 3.15 2143.81 580.05 0.14
Reach1 30779 5-year 8600.00 430.52 458.83 445.64 459.03 0.000564 3.77 2429.70 637.64 0.17
Reach1 30779 10-year 9900.00 430.52 459.90 446.52 460.10 0.000535 3.79 2750.37 705.70 0.16
Reach1 30779 25-year 11000.00 430.52 460.49 447.17 460.71 0.000552 3.91 2933.71 777.93 0.17
Reach1 30779 50-year 11800.00 430.52 460.88 447.69 461.12 0.000566 3.99 3059.42 817.92 0.17
Reach1 30779 100-year 13000.00 430.52 461.22 448.38 461.48 0.000624 4.22 3167.94 861.81 0.18
Reach1 30779 OLD 500-year 36200.00 430.52 467.46 458.60 467.58 0.000146 2.30 13479.66 1391.81 0.09
Reach1 30779 NEW 500-year 55500.00 430.52 468.73 461.29 468.94 0.000239 3.06 15283.61 1434.40 0.12
Reach1 30531 2-year 6300.00 435.91 457.66 449.43 457.84 0.000560 3.23 1856.05 562.67 0.16
Reach1 30531 5-year 8600.00 435.91 458.59 451.34 458.85 0.000710 3.78 2117.31 620.68 0.18
Reach1 30531 10-year 9900.00 435.91 459.68 452.30 459.94 0.000627 3.69 2440.39 691.00 0.17
Reach1 30531 25-year 11000.00 435.91 460.26 453.01 460.54 0.000632 3.76 2623.45 740.18 0.17
Reach1 30531 50-year 11800.00 435.91 460.65 453.48 460.94 0.000638 3.81 2750.55 831.47 0.17
Reach1 30531 100-year 13000.00 435.91 460.96 454.23 461.29 0.000696 4.04 2855.03 869.54 0.18
Reach1 30531 OLD 500-year 36200.00 435.91 467.42 459.22 467.54 0.000150 2.37 13207.14 1298.40 0.09
Reach1 30531 NEW 500-year 55500.00 435.91 468.66 462.26 468.89 0.000244 3.13 14815.28 1298.40 0.11
Reach1 30424 2-year 6300.00 435.44 457.16 447.99 457.70 0.001994 5.90 1067.94 459.39 0.30
Reach1 30424 5-year 8600.00 435.44 458.57 449.83 458.77 0.000435 2.79 2517.39 574.73 0.14
Reach1 30424 10-year 9900.00 435.44 459.66 450.80 459.86 0.000387 2.69 2877.95 675.33 0.13
Reach1 30424 25-year 11000.00 435.44 460.24 451.54 460.46 0.000396 2.75 3080.77 753.79 0.13
Reach1 30424 50-year 11800.00 435.44 460.63 452.06 460.86 0.000408 2.81 3222.98 823.06 0.14
Reach1 30424 100-year 13000.00 435.44 460.94 452.83 461.21 0.000449 2.97 3339.16 931.86 0.14
Reach1 30424 OLD 500-year 36200.00 435.44 467.38 457.82 467.52 0.000155 2.23 13089.93 1384.78 0.09
Reach1 30424 NEW 500-year 55500.00 435.44 468.60 461.03 468.86 0.000251 2.96 14783.14 1388.07 0.12
Reach1 30366 2-year 6300.00 433.94 457.10 446.90 457.57 0.001755 5.53 1139.46 419.26 0.28
Reach1 30366 5-year 8600.00 433.94 458.57 448.77 458.74 0.000361 2.59 2726.81 536.32 0.13
Reach1 30366 10-year 9900.00 433.94 459.66 449.74 459.83 0.000317 2.48 3111.06 637.62 0.12
Reach1 30366 25-year 11000.00 433.94 460.24 450.53 460.43 0.000318 2.50 3323.62 738.93 0.12
Reach1 30366 50-year 11800.00 433.94 460.63 451.09 460.83 0.000320 2.53 3469.63 792.53 0.12
Reach1 30366 100-year 13000.00 433.94 460.94 451.86 461.17 0.000350 2.66 3587.93 868.85 0.13
Reach1 30366 OLD 500-year 36200.00 433.94 467.36 457.38 467.51 0.000158 2.23 12889.69 1392.34 0.09
Reach1 30366 NEW 500-year 55500.00 433.94 468.57 460.09 468.84 0.000258 2.97 14574.87 1392.34 0.12
Reach1 30257 2-year 6300.00 434.99 456.92 447.24 457.38 0.001668 5.45 1156.44 346.96 0.27
Reach1 30257 5-year 8600.00 434.99 458.55 449.01 458.70 0.000323 2.48 2866.54 424.76 0.12
Reach1 30257 10-year 9900.00 434.99 459.64 449.92 459.80 0.000281 2.39 3279.31 493.89 0.11
Reach1 30257 25-year 11000.00 434.99 460.23 450.64 460.40 0.000281 2.44 3508.51 595.14 0.12
Reach1 30257 50-year 11800.00 434.99 460.62 451.16 460.80 0.000281 2.48 3665.83 715.99 0.12
Reach1 30257 100-year 13000.00 434.99 460.92 451.92 461.13 0.000307 2.61 3792.88 908.60 0.12
Reach1 30257 OLD 500-year 36200.00 434.99 467.34 457.38 467.50 0.000162 2.32 12867.01 1457.00 0.09
Reach1 30257 NEW 500-year 55500.00 434.99 468.54 459.97 468.81 0.000264 3.08 14621.58 1472.10 0.12
Reach1 30063 2-year 6300.00 435.49 456.46 447.25 457.01 0.002125 5.92 1063.73 382.13 0.30
Reach1 30063 5-year 8600.00 435.49 458.51 448.95 458.64 0.000262 2.10 3143.68 473.92 0.11
Reach1 30063 10-year 9900.00 435.49 459.62 449.83 459.74 0.000222 1.97 3680.21 620.15 0.10
Reach1 30063 25-year 11000.00 435.49 460.21 450.56 460.34 0.000220 1.97 3990.55 732.79 0.10
Reach1 30063 50-year 11800.00 435.49 460.60 451.05 460.74 0.000220 1.98 4202.23 788.69 0.10
Reach1 30063 100-year 13000.00 435.49 460.91 451.81 461.07 0.000240 2.08 4371.14 874.90 0.10
Reach1 30063 OLD 500-year 36200.00 435.49 467.34 457.38 467.46 0.000144 1.98 14249.73 1609.02 0.09
Reach1 30063 NEW 500-year 55500.00 435.49 468.54 459.85 468.75 0.000237 2.66 16187.04 1658.79 0.11
Reach1 29817 2-year 6300.00 431.84 456.62 456.72 0.000312 2.48 2483.48 392.49 0.12
Reach1 29817 5-year 8600.00 431.84 458.47 458.58 0.000254 2.36 3249.94 502.76 0.11
Reach1 29817 10-year 9900.00 431.84 459.58 459.69 0.000221 2.14 3991.44 944.65 0.10
Reach1 29817 25-year 11000.00 431.84 460.18 460.29 0.000212 2.06 4652.59 1303.51 0.10
Reach1 29817 50-year 11800.00 431.84 460.58 460.69 0.000203 2.00 5215.10 1498.49 0.09
Reach1 29817 100-year 13000.00 431.84 460.89 461.01 0.000214 2.02 5717.49 1646.12 0.09
Reach1 29817 OLD 500-year 36200.00 431.84 467.36 467.42 0.000083 1.54 19627.01 2268.00 0.06
Reach1 29817 NEW 500-year 55500.00 431.84 468.58 468.68 0.000131 2.02 22389.65 2272.33 0.08
Reach1 29530 2-year 6300.00 434.73 456.40 456.59 0.000783 3.16 1877.44 363.11 0.18
Reach1 29530 5-year 8600.00 434.73 458.31 458.48 0.000526 2.78 2878.03 692.07 0.15
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 29530 10-year 9900.00 434.73 459.50 459.62 0.000367 2.44 4058.36 1419.99 0.13
Reach1 29530 25-year 11000.00 434.73 460.12 460.22 0.000320 2.33 5090.81 1893.96 0.12
Reach1 29530 50-year 11800.00 434.73 460.53 460.62 0.000280 2.22 5889.71 1946.50 0.11
Reach1 29530 100-year 13000.00 434.73 460.85 460.93 0.000277 2.23 6516.42 1976.97 0.11
Reach1 29530 OLD 500-year 36200.00 434.73 467.34 467.39 0.000099 1.75 21036.09 2324.75 0.07
Reach1 29530 NEW 500-year 55500.00 434.73 468.55 468.63 0.000159 2.32 23854.22 2344.33 0.09
Reach1 29331 2-year 6300.00 433.44 456.16 445.45 456.40 0.001057 3.89 1620.65 216.69 0.22
Reach1 29331 5-year 8700.00 433.44 457.97 447.16 458.29 0.001208 4.52 1924.42 238.25 0.24
Reach1 29331 10-year 10100.00 433.44 459.08 448.07 459.43 0.001232 4.77 2116.29 688.70 0.24
Reach1 29331 25-year 11200.00 433.44 459.62 448.88 460.02 0.001330 5.06 2212.47 798.64 0.25
Reach1 29331 50-year 12100.00 433.44 459.97 449.72 460.40 0.001431 5.32 2274.73 821.55 0.26
Reach1 29331 100-year 13000.00 433.44 460.22 450.53 460.71 0.001559 5.60 2320.47 839.05 0.28
Reach1 29331 OLD 500-year 36200.00 433.44 466.12 457.90 467.06 0.002597 8.52 6169.72 1556.84 0.37
Reach1 29331 NEW 500-year 55500.00 433.44 468.15 461.86 468.49 0.000826 5.14 13898.63 1794.01 0.21
Reach1 29267 Bridge
Reach1 29206 2-year 6300.00 437.37 455.99 444.89 456.20 0.000868 3.68 1709.74 210.00 0.20
Reach1 29206 5-year 8700.00 437.37 457.76 446.59 458.05 0.001032 4.34 2004.22 226.07 0.22
Reach1 29206 10-year 10100.00 437.37 458.85 447.45 459.18 0.001068 4.61 2191.71 235.34 0.23
Reach1 29206 25-year 11200.00 437.37 459.37 448.09 459.74 0.001166 4.91 2282.41 239.69 0.24
Reach1 29206 50-year 12100.00 437.37 459.69 448.59 460.11 0.001266 5.17 2339.57 242.53 0.25
Reach1 29206 100-year 13000.00 437.37 459.92 449.07 460.38 0.001391 5.46 2379.45 244.55 0.26
Reach1 29206 OLD 500-year 36200.00 437.37 463.01 457.12 465.34 0.005947 12.25 2955.43 889.18 0.56
Reach1 29206 NEW 500-year 55500.00 437.37 467.08 461.13 467.98 0.002495 8.87 9224.41 1770.81 0.37
Reach1 29050 2-year 6300.00 442.00 455.40 455.90 0.002397 5.95 1194.57 259.04 0.33
Reach1 29050 5-year 8700.00 442.00 457.53 457.84 0.001507 5.14 2202.22 667.17 0.26
Reach1 29050 10-year 10100.00 442.00 458.75 458.95 0.000931 4.23 3160.81 880.94 0.21
Reach1 29050 25-year 11200.00 442.00 459.31 459.48 0.000784 3.96 3671.13 952.15 0.19
Reach1 29050 50-year 12100.00 442.00 459.66 459.82 0.000755 3.92 4009.76 1017.44 0.19
Reach1 29050 100-year 13000.00 442.00 459.90 460.07 0.000744 3.92 4259.08 1046.94 0.19
Reach1 29050 OLD 500-year 36200.00 442.00 463.78 464.05 0.000693 4.33 9795.70 1772.08 0.19
Reach1 29050 NEW 500-year 55500.00 442.00 467.25 467.52 0.000422 3.85 15940.17 1772.08 0.15
Reach1 28891 2-year 6300.00 442.00 455.32 455.54 0.001331 4.17 1763.46 455.38 0.24
Reach1 28891 5-year 8700.00 442.00 457.51 457.63 0.000691 3.30 3201.41 883.54 0.18
Reach1 28891 10-year 10100.00 442.00 458.74 458.82 0.000412 2.67 4530.23 1157.08 0.14
Reach1 28891 25-year 11200.00 442.00 459.30 459.38 0.000340 2.48 5185.75 1172.94 0.13
Reach1 28891 50-year 12100.00 442.00 459.65 459.72 0.000319 2.39 5593.71 1192.80 0.12
Reach1 28891 100-year 13000.00 442.00 459.89 459.97 0.000316 2.41 5885.11 1208.10 0.12
Reach1 28891 OLD 500-year 36200.00 442.00 463.77 463.95 0.000356 3.08 11647.00 1795.15 0.14
Reach1 28891 NEW 500-year 55500.00 442.00 467.25 467.45 0.000259 3.00 17939.70 1810.37 0.12
Reach1 28791 2-year 6300.00 442.00 455.33 448.43 455.42 0.000566 3.03 2964.15 546.25 0.16
Reach1 28791 5-year 8700.00 442.00 457.50 449.49 457.57 0.000396 2.73 4895.71 1148.18 0.14
Reach1 28791 10-year 10100.00 442.00 458.74 450.05 458.78 0.000240 2.21 6334.20 1176.96 0.11
Reach1 28791 25-year 11200.00 442.00 459.30 450.76 459.34 0.000213 2.13 6999.83 1200.81 0.10
Reach1 28791 50-year 12100.00 442.00 459.65 451.07 459.69 0.000207 2.12 7411.30 1239.09 0.10
Reach1 28791 100-year 13000.00 442.00 459.89 451.45 459.94 0.000210 2.16 7702.46 1260.14 0.10
Reach1 28791 OLD 500-year 36200.00 442.00 463.78 455.51 463.91 0.000316 3.11 12922.09 2049.48 0.13
Reach1 28791 NEW 500-year 55500.00 442.00 467.25 458.20 467.41 0.000257 3.16 18980.99 2187.81 0.12
Reach1 28586 2-year 6300.00 439.52 455.31 446.10 455.35 0.000170 1.80 4363.60 915.52 0.10
Reach1 28586 5-year 8700.00 439.52 457.49 446.98 457.52 0.000110 1.61 6589.75 1089.58 0.09
Reach1 28586 10-year 10100.00 439.52 458.73 447.49 458.75 0.000086 1.50 7981.41 1187.86 0.08
Reach1 28586 25-year 11200.00 439.52 459.29 447.92 459.32 0.000084 1.52 8655.15 1201.12 0.08
Reach1 28586 50-year 12100.00 439.52 459.63 448.26 459.66 0.000086 1.56 9070.77 1206.67 0.08
Reach1 28586 100-year 13000.00 439.52 459.88 448.55 459.91 0.000090 1.61 9363.14 1210.85 0.08
Reach1 28586 OLD 500-year 36200.00 439.52 463.76 453.14 463.85 0.000200 2.76 14474.17 1865.47 0.12
Reach1 28586 NEW 500-year 55500.00 439.52 467.24 455.89 467.36 0.000193 3.02 19695.09 2122.76 0.12
Reach1 28510 2-year 6300.00 441.73 455.28 446.69 455.32 0.000147 1.78 4280.36 853.21 0.10
Reach1 28510 5-year 8700.00 441.73 457.47 447.38 457.50 0.000109 1.72 6436.48 1089.58 0.09
Reach1 28510 10-year 10100.00 441.73 458.70 447.76 458.73 0.000089 1.65 7837.58 1151.32 0.08
Reach1 28510 25-year 11200.00 441.73 459.27 448.02 459.30 0.000088 1.69 8489.57 1164.29 0.08
Reach1 28510 50-year 12100.00 441.73 459.61 448.23 459.64 0.000091 1.73 8892.70 1175.19 0.08
Reach1 28510 100-year 13000.00 441.73 459.85 448.43 459.89 0.000096 1.80 9176.64 1188.40 0.09
Reach1 28510 OLD 500-year 36200.00 441.73 463.70 452.32 463.81 0.000228 3.16 13927.07 1949.91 0.14
Reach1 28510 NEW 500-year 55500.00 441.73 467.18 455.65 467.32 0.000219 3.42 18624.30 2076.85 0.13
Reach1 28380 2-year 6300.00 440.63 455.24 447.79 455.29 0.000276 2.10 3877.94 781.20 0.13
Reach1 28380 5-year 8700.00 440.63 457.43 448.67 457.48 0.000216 2.07 5755.75 948.78 0.11
Reach1 28380 10-year 10100.00 440.63 458.67 449.03 458.72 0.000190 2.04 6976.36 1017.76 0.11
Reach1 28380 25-year 11200.00 440.63 459.23 449.31 459.28 0.000190 2.09 7553.21 1033.57 0.11
Reach1 28380 50-year 12100.00 440.63 459.58 449.52 459.63 0.000198 2.16 7909.71 1098.21 0.11
Reach1 28380 100-year 13000.00 440.63 459.81 449.74 459.87 0.000211 2.26 8159.94 1168.62 0.11
Reach1 28380 OLD 500-year 36200.00 440.63 463.59 454.12 463.76 0.000535 4.17 12869.34 1904.93 0.18
Reach1 28380 NEW 500-year 55500.00 440.63 467.08 456.24 467.27 0.000496 4.51 17807.10 2102.18 0.18
Reach1 28217 2-year 6300.00 438.83 455.13 447.33 455.23 0.000403 2.74 2821.10 504.20 0.16
Reach1 28217 5-year 8700.00 438.83 457.32 448.23 457.43 0.000382 2.85 4270.06 808.99 0.16
Reach1 28217 10-year 10100.00 438.83 458.57 448.70 458.67 0.000348 2.82 5393.25 975.41 0.15
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 28217 25-year 11200.00 438.83 459.13 449.06 459.23 0.000356 2.91 5945.32 999.44 0.15
Reach1 28217 50-year 12100.00 438.83 459.47 449.33 459.58 0.000372 3.01 6285.34 1033.65 0.16
Reach1 28217 100-year 13000.00 438.83 459.70 449.61 459.82 0.000398 3.14 6520.51 1083.62 0.16
Reach1 28217 OLD 500-year 36200.00 438.83 463.28 454.70 463.63 0.001047 5.70 10919.22 1996.30 0.26
Reach1 28217 NEW 500-year 55500.00 438.83 466.79 458.03 467.15 0.000949 6.00 15838.88 2293.25 0.24
Reach1 28122 2-year 6300.00 439.41 455.10 447.00 455.20 0.000370 2.69 2739.77 347.11 0.16
Reach1 28122 5-year 8700.00 439.41 457.28 448.02 457.39 0.000368 2.88 3649.09 538.04 0.16
Reach1 28122 10-year 10100.00 439.41 458.52 448.52 458.64 0.000355 2.93 4476.90 818.20 0.16
Reach1 28122 25-year 11200.00 439.41 459.07 448.89 459.20 0.000369 3.03 4945.51 916.92 0.16
Reach1 28122 50-year 12100.00 439.41 459.40 449.19 459.54 0.000389 3.13 5238.93 947.83 0.17
Reach1 28122 100-year 13000.00 439.41 459.63 449.45 459.78 0.000419 3.27 5439.08 960.52 0.17
Reach1 28122 OLD 500-year 36200.00 439.41 463.03 454.41 463.51 0.001207 6.11 9332.59 1950.58 0.28
Reach1 28122 NEW 500-year 55500.00 439.41 466.58 457.85 467.04 0.001158 6.58 14037.15 2304.81 0.27
Reach1 27892 2-year 6300.00 439.15 454.97 446.67 455.10 0.000442 2.92 2281.52 314.48 0.17
Reach1 27892 5-year 8700.00 439.15 457.16 447.75 457.30 0.000439 3.10 3041.06 383.57 0.17
Reach1 27892 10-year 10100.00 439.15 458.40 448.30 458.55 0.000418 3.13 3570.52 502.07 0.17
Reach1 27892 25-year 11200.00 439.15 458.95 448.74 459.10 0.000437 3.25 3876.42 606.54 0.17
Reach1 27892 50-year 12100.00 439.15 459.28 449.06 459.44 0.000462 3.38 4086.53 685.73 0.18
Reach1 27892 100-year 13100.00 439.15 459.49 449.42 459.67 0.000509 3.57 4234.97 741.60 0.19
Reach1 27892 OLD 500-year 36200.00 439.15 462.72 455.26 463.21 0.001356 6.31 7561.79 1505.69 0.31
Reach1 27892 NEW 500-year 55500.00 439.15 466.37 458.71 466.78 0.001002 5.96 12036.47 2344.43 0.26
Reach1 27672 2-year 6300.00 439.63 455.03 446.88 455.05 0.000047 0.94 5444.12 846.32 0.05
Reach1 27672 5-year 8700.00 439.63 457.22 447.97 457.24 0.000036 0.91 7296.87 937.49 0.05
Reach1 27672 10-year 10100.00 439.63 458.47 449.68 458.49 0.000031 0.88 8427.41 1288.80 0.05
Reach1 27672 25-year 11200.00 439.63 459.02 449.83 459.05 0.000032 0.91 8956.89 1367.65 0.05
Reach1 27672 50-year 12100.00 439.63 459.35 449.95 459.38 0.000034 0.95 9298.87 1450.40 0.05
Reach1 27672 100-year 13100.00 439.63 459.57 450.06 459.60 0.000037 0.99 9532.48 1483.25 0.05
Reach1 27672 OLD 500-year 36200.00 439.63 462.92 452.01 463.05 0.000109 1.95 13383.62 1822.27 0.09
Reach1 27672 NEW 500-year 55500.00 439.63 466.48 453.43 466.65 0.000111 2.23 17911.22 2256.66 0.09
Reach1 27603 2-year 6300.00 439.16 455.02 446.42 455.04 0.000043 0.96 5654.79 910.41 0.05
Reach1 27603 5-year 8700.00 439.16 457.22 447.55 457.24 0.000033 0.90 7602.96 1025.20 0.05
Reach1 27603 10-year 10100.00 439.16 458.47 448.09 458.49 0.000029 0.88 8814.69 1313.99 0.05
Reach1 27603 25-year 11200.00 439.16 459.02 449.73 459.05 0.000030 0.91 9395.30 1419.98 0.05
Reach1 27603 50-year 12100.00 439.16 459.35 449.86 459.38 0.000031 0.94 9755.81 1469.94 0.05
Reach1 27603 100-year 13100.00 439.16 459.57 450.00 459.60 0.000034 0.99 9995.51 1513.39 0.05
Reach1 27603 OLD 500-year 36200.00 439.16 462.91 452.03 463.04 0.000107 1.86 13820.98 1812.70 0.09
Reach1 27603 NEW 500-year 55500.00 439.16 466.48 453.33 466.64 0.000112 2.07 18291.92 2056.68 0.09
Reach1 27456 2-year 6300.00 439.54 455.01 446.85 455.03 0.000081 1.25 4943.40 850.00 0.07
Reach1 27456 5-year 8700.00 439.54 457.21 447.84 457.23 0.000061 1.17 6888.02 955.29 0.06
Reach1 27456 10-year 10100.00 439.54 458.46 448.37 458.48 0.000051 1.11 8089.35 1200.17 0.06
Reach1 27456 25-year 11200.00 439.54 459.01 449.66 459.04 0.000052 1.14 8641.75 1338.55 0.06
Reach1 27456 50-year 12100.00 439.54 459.34 449.85 459.37 0.000056 1.19 8981.95 1422.61 0.06
Reach1 27456 100-year 13100.00 439.54 459.56 450.03 459.59 0.000061 1.26 9209.51 1475.08 0.06
Reach1 27456 OLD 500-year 36200.00 439.54 462.89 452.59 463.02 0.000174 2.27 13091.14 1812.84 0.11
Reach1 27456 NEW 500-year 55500.00 439.54 466.45 454.09 466.62 0.000161 2.34 17758.90 2249.69 0.10
Reach1 27298 2-year 6300.00 439.03 454.98 446.68 455.02 0.000134 1.59 4221.09 799.03 0.09
Reach1 27298 5-year 8700.00 439.03 457.19 447.65 457.22 0.000091 1.41 5997.73 977.15 0.08
Reach1 27298 10-year 10100.00 439.03 458.44 448.17 458.47 0.000086 1.41 7177.72 1286.45 0.08
Reach1 27298 25-year 11200.00 439.03 459.00 448.55 459.03 0.000084 1.40 7782.49 1437.94 0.08
Reach1 27298 50-year 12100.00 439.03 459.33 448.82 459.36 0.000085 1.42 8145.75 1508.19 0.08
Reach1 27298 100-year 13100.00 439.03 459.54 449.13 459.58 0.000092 1.48 8382.60 1519.56 0.08
Reach1 27298 OLD 500-year 36200.00 439.03 462.83 453.73 462.98 0.000230 2.54 12146.37 1710.11 0.12
Reach1 27298 NEW 500-year 55500.00 439.03 466.39 455.06 466.59 0.000213 2.66 16308.25 2075.73 0.11
Reach1 27248 2-year 6300.00 439.24 454.96 446.71 455.01 0.000208 1.93 3765.84 886.16 0.11
Reach1 27248 5-year 8700.00 439.24 457.18 447.68 457.22 0.000120 1.58 5798.81 997.59 0.09
Reach1 27248 10-year 10100.00 439.24 458.44 448.17 458.47 0.000099 1.51 7057.69 1176.57 0.08
Reach1 27248 25-year 11200.00 439.24 458.99 448.57 459.02 0.000094 1.51 7684.82 1329.36 0.08
Reach1 27248 50-year 12100.00 439.24 459.32 448.84 459.36 0.000095 1.54 8063.01 1382.07 0.08
Reach1 27248 100-year 13100.00 439.24 459.54 449.14 459.57 0.000102 1.60 8310.18 1440.61 0.08
Reach1 27248 OLD 500-year 36200.00 439.24 462.83 454.79 462.97 0.000233 2.74 12308.29 1809.18 0.12
Reach1 27248 NEW 500-year 55500.00 439.24 466.40 456.01 466.57 0.000202 2.86 16847.64 1980.25 0.11
Reach1 27145 2-year 6300.00 439.97 454.92 446.30 454.98 0.000184 2.17 3568.39 874.14 0.11
Reach1 27145 5-year 8700.00 439.97 457.16 447.35 457.20 0.000106 1.86 5585.28 931.69 0.09
Reach1 27145 10-year 10100.00 439.97 458.42 447.86 458.46 0.000081 1.74 6830.28 1084.66 0.08
Reach1 27145 25-year 11200.00 439.97 458.98 448.23 459.01 0.000079 1.75 7458.13 1183.03 0.08
Reach1 27145 50-year 12100.00 439.97 459.31 448.53 459.34 0.000081 1.80 7860.23 1246.29 0.08
Reach1 27145 100-year 13100.00 439.97 459.52 448.86 459.56 0.000087 1.88 8127.75 1260.01 0.08
Reach1 27145 OLD 500-year 36200.00 439.97 462.80 455.06 462.94 0.000212 3.33 12530.44 1718.50 0.13
Reach1 27145 NEW 500-year 55500.00 439.97 466.38 456.38 466.54 0.000186 3.50 17402.37 2021.34 0.13
Reach1 27041 2-year 6300.00 439.82 454.87 445.90 454.96 0.000229 2.74 3087.88 868.89 0.13
Reach1 27041 5-year 8700.00 439.82 457.14 447.03 457.19 0.000123 2.24 5137.34 932.20 0.10
Reach1 27041 10-year 10100.00 439.82 458.41 447.64 458.45 0.000092 2.04 6382.64 1034.87 0.09
Reach1 27041 25-year 11200.00 439.82 458.96 448.11 459.01 0.000091 2.08 6974.88 1094.87 0.09
Reach1 27041 50-year 12100.00 439.82 459.29 448.44 459.34 0.000096 2.15 7364.14 1169.05 0.09
Reach1 27041 100-year 13100.00 439.82 459.50 448.81 459.55 0.000103 2.25 7614.33 1186.17 0.09
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 27041 OLD 500-year 36200.00 439.82 462.76 455.78 462.92 0.000231 3.77 11698.33 1699.82 0.14
Reach1 27041 NEW 500-year 55500.00 439.82 466.34 457.05 466.53 0.000193 3.82 16270.18 2032.18 0.14
Reach1 26970 2-year 6300.00 440.00 454.81 446.23 454.94 0.000356 3.20 2569.49 783.49 0.16
Reach1 26970 5-year 8700.00 440.00 457.11 447.55 457.18 0.000176 2.45 4536.95 896.76 0.12
Reach1 26970 10-year 10100.00 440.00 458.39 448.23 458.44 0.000127 2.21 5780.39 1093.58 0.10
Reach1 26970 25-year 11200.00 440.00 458.95 448.73 459.00 0.000120 2.20 6404.79 1155.37 0.10
Reach1 26970 50-year 12100.00 440.00 459.27 449.11 459.33 0.000123 2.26 6793.22 1198.93 0.10
Reach1 26970 100-year 13100.00 440.00 459.49 449.54 459.54 0.000132 2.37 7048.76 1259.62 0.10
Reach1 26970 OLD 500-year 36200.00 440.00 462.73 456.27 462.90 0.000279 3.88 11191.41 1643.26 0.16
Reach1 26970 NEW 500-year 55500.00 440.00 466.32 457.49 466.51 0.000220 3.86 15815.18 2089.88 0.14
Reach1 26828 2-year 6300.00 440.02 454.82 446.36 454.87 0.000301 2.07 3556.56 919.33 0.11
Reach1 26828 5-year 8700.00 440.02 457.11 447.42 457.15 0.000139 1.59 5775.90 1140.47 0.08
Reach1 26828 10-year 10100.00 440.02 458.39 447.95 458.42 0.000101 1.44 7123.93 1228.44 0.07
Reach1 26828 25-year 11200.00 440.02 458.95 448.33 458.98 0.000097 1.44 7737.92 1266.52 0.06
Reach1 26828 50-year 12100.00 440.02 459.28 448.64 459.31 0.000098 1.47 8109.82 1326.79 0.07
Reach1 26828 100-year 13100.00 440.02 459.49 448.95 459.52 0.000105 1.54 8353.37 1372.86 0.07
Reach1 26828 OLD 500-year 36200.00 440.02 462.72 454.93 462.86 0.000248 2.67 12334.80 1874.45 0.11
Reach1 26828 NEW 500-year 55500.00 440.02 466.31 456.05 466.48 0.000213 2.78 16797.62 2086.53 0.10
Reach1 26688 2-year 6300.00 436.64 454.81 444.98 454.84 0.000108 1.46 4836.43 962.36 0.08
Reach1 26688 5-year 8700.00 436.64 457.11 446.14 457.13 0.000065 1.22 7144.02 1048.05 0.06
Reach1 26688 10-year 10100.00 436.64 458.38 446.76 458.41 0.000053 1.14 8527.75 1142.15 0.06
Reach1 26688 25-year 11200.00 436.64 458.94 447.23 458.96 0.000053 1.15 9170.06 1165.60 0.06
Reach1 26688 50-year 12100.00 436.64 459.27 447.90 459.30 0.000054 1.18 9555.53 1179.59 0.06
Reach1 26688 100-year 13100.00 436.64 459.48 448.25 459.51 0.000059 1.23 9804.76 1188.64 0.06
Reach1 26688 OLD 500-year 36200.00 436.64 462.71 453.60 462.82 0.000160 2.18 13839.59 1276.06 0.10
Reach1 26688 NEW 500-year 55500.00 436.64 466.30 454.72 466.44 0.000153 2.32 18560.31 2223.68 0.10
Reach1 26621 2-year 6300.00 436.92 454.80 444.72 454.83 0.000101 1.43 4925.52 955.37 0.08
Reach1 26621 5-year 8700.00 436.92 457.10 446.01 457.13 0.000062 1.21 7216.83 1042.49 0.06
Reach1 26621 10-year 10100.00 436.92 458.38 446.74 458.40 0.000050 1.12 8589.47 1363.25 0.06
Reach1 26621 25-year 11200.00 436.92 458.94 447.13 458.96 0.000050 1.14 9226.43 1440.04 0.06
Reach1 26621 50-year 12100.00 436.92 459.27 447.45 459.29 0.000052 1.17 9611.70 1468.31 0.06
Reach1 26621 100-year 13100.00 436.92 459.48 447.80 459.50 0.000057 1.22 9862.29 1489.36 0.06
Reach1 26621 OLD 500-year 36200.00 436.92 462.70 453.49 462.81 0.000163 2.20 14025.51 1773.37 0.10
Reach1 26621 NEW 500-year 55500.00 436.92 466.29 454.61 466.43 0.000146 2.25 18934.00 2302.33 0.09
Reach1 26383 2-year 6300.00 437.62 454.67 445.50 454.78 0.000367 2.63 2411.71 1052.56 0.14
Reach1 26383 5-year 8700.00 437.62 456.96 446.53 457.09 0.000370 2.88 3036.20 1124.35 0.15
Reach1 26383 10-year 10100.00 437.62 458.23 447.04 458.37 0.000363 2.97 3438.85 1188.47 0.15
Reach1 26383 25-year 11200.00 437.62 458.94 447.44 458.95 0.000016 0.62 12061.16 1252.33 0.03
Reach1 26383 50-year 12100.00 437.62 459.27 447.75 459.28 0.000017 0.64 12491.92 1287.89 0.03
Reach1 26383 100-year 13100.00 437.62 459.48 448.08 459.49 0.000018 0.68 12762.88 1291.27 0.04
Reach1 26383 OLD 500-year 36200.00 437.62 462.69 453.64 462.78 0.000058 1.31 17050.02 1704.31 0.06
Reach1 26383 NEW 500-year 55500.00 437.62 466.28 456.91 466.40 0.000061 1.47 21906.04 2014.27 0.06
Reach1 26194 2-year 6300.00 436.68 454.62 444.14 454.72 0.000299 2.53 2535.30 1143.84 0.14
Reach1 26194 5-year 8700.00 436.68 456.90 445.44 457.02 0.000319 2.78 3194.38 1231.05 0.15
Reach1 26194 10-year 10100.00 436.68 458.17 446.07 458.30 0.000319 2.83 3650.12 1291.21 0.15
Reach1 26194 25-year 11200.00 436.68 458.80 446.49 458.93 0.000350 3.00 3895.98 1329.05 0.16
Reach1 26194 50-year 12100.00 436.68 459.11 446.83 459.26 0.000378 3.14 4024.44 1335.76 0.16
Reach1 26194 100-year 13100.00 436.68 459.30 447.17 459.47 0.000423 3.33 4102.57 1339.83 0.17
Reach1 26194 OLD 500-year 36200.00 436.68 462.69 453.13 462.76 0.000049 1.22 18341.38 1628.47 0.05
Reach1 26194 NEW 500-year 55500.00 436.68 466.28 456.53 466.39 0.000053 1.37 23502.77 2210.57 0.06
Reach1 26087 2-year 8100.00 436.69 454.48 445.37 454.66 0.000547 3.43 2423.32 1154.27 0.18
Reach1 26087 5-year 11900.00 436.69 456.71 447.07 456.96 0.000654 4.03 3046.87 1226.95 0.21
Reach1 26087 10-year 14400.00 436.69 457.95 447.94 458.23 0.000711 4.31 3449.98 1279.70 0.22
Reach1 26087 25-year 16500.00 436.69 458.52 448.61 458.85 0.000822 4.70 3648.27 1299.50 0.24
Reach1 26087 50-year 18100.00 436.69 458.78 449.09 459.17 0.000952 5.09 3746.10 1322.74 0.25
Reach1 26087 100-year 20200.00 436.69 458.89 449.69 459.36 0.001157 5.62 3785.96 1326.33 0.28
Reach1 26087 OLD 500-year 36200.00 436.69 462.69 453.41 462.76 0.000050 1.29 18613.59 1902.33 0.06
Reach1 26087 NEW 500-year 55500.00 436.69 466.28 456.98 466.38 0.000051 1.41 24071.85 2218.15 0.06
Reach1 25927 2-year 8100.00 437.59 454.38 445.47 454.57 0.000593 3.49 2344.32 1225.51 0.19
Reach1 25927 5-year 11900.00 437.59 456.60 447.19 456.85 0.000687 4.08 3010.26 1321.08 0.21
Reach1 25927 10-year 14400.00 437.59 457.83 448.11 458.11 0.000714 4.33 3441.47 1372.24 0.22
Reach1 25927 25-year 16500.00 437.59 458.39 448.80 458.72 0.000808 4.67 3647.25 1397.38 0.23
Reach1 25927 50-year 18100.00 437.59 458.64 449.30 459.02 0.000916 5.01 3742.11 1407.31 0.25
Reach1 25927 100-year 20200.00 437.59 458.71 449.93 459.18 0.001119 5.55 3770.05 1409.27 0.28
Reach1 25927 OLD 500-year 36200.00 437.59 462.69 453.74 462.75 0.000036 1.12 20166.06 2054.95 0.05
Reach1 25927 NEW 500-year 55500.00 437.59 466.28 457.32 466.37 0.000040 1.28 25533.48 2225.56 0.05
Reach1 25760 2-year 8100.00 437.17 454.23 445.92 454.46 0.000723 3.84 2131.63 1198.89 0.21
Reach1 25760 5-year 11900.00 437.17 456.41 447.74 456.72 0.000854 4.47 2704.30 1296.53 0.24
Reach1 25760 10-year 14400.00 437.17 457.62 448.63 457.98 0.000901 4.79 3085.67 1327.78 0.25
Reach1 25760 25-year 16500.00 437.17 458.14 449.33 458.56 0.001035 5.22 3255.30 1341.76 0.26
Reach1 25760 50-year 18100.00 437.17 458.35 449.81 458.84 0.001181 5.62 3324.88 1348.76 0.28
Reach1 25760 100-year 20200.00 437.17 458.35 450.42 458.95 0.001473 6.27 3323.59 1348.62 0.32
Reach1 25760 OLD 500-year 36200.00 437.17 462.68 454.21 462.74 0.000039 1.12 19930.58 1985.11 0.05
Reach1 25760 NEW 500-year 55500.00 437.17 466.28 457.64 466.36 0.000042 1.26 25552.83 2240.25 0.05
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 25558 2-year 8100.00 436.03 454.15 445.37 454.31 0.000566 3.30 2468.98 1227.46 0.18
Reach1 25558 5-year 11900.00 436.03 456.31 446.93 456.55 0.000654 3.87 3101.78 1284.06 0.20
Reach1 25558 10-year 14400.00 436.03 457.52 447.75 457.79 0.000698 4.17 3489.91 1320.09 0.21
Reach1 25558 25-year 16500.00 436.03 458.02 448.39 458.35 0.000816 4.55 3664.55 1368.73 0.24
Reach1 25558 50-year 18100.00 436.03 458.64 448.84 458.67 0.000046 1.09 13255.85 1472.63 0.06
Reach1 25558 100-year 20200.00 436.03 458.71 449.44 458.75 0.000056 1.20 13357.78 1478.55 0.07
Reach1 25558 OLD 500-year 36200.00 436.03 462.67 453.06 462.73 0.000061 1.27 19709.27 2068.61 0.07
Reach1 25558 NEW 500-year 55500.00 436.03 466.27 456.24 466.35 0.000063 1.37 25654.76 2292.22 0.06
Reach1 25499 2-year 8100.00 434.89 454.11 445.62 454.28 0.000596 3.32 2455.29 1343.56 0.19
Reach1 25499 5-year 11900.00 434.89 456.27 447.24 456.50 0.000712 3.87 3092.46 1425.70 0.21
Reach1 25499 10-year 14400.00 434.89 457.69 448.06 457.71 0.000029 0.81 12540.71 1509.26 0.05
Reach1 25499 25-year 16500.00 434.89 458.23 448.67 458.25 0.000032 0.84 13362.82 1559.71 0.05
Reach1 25499 50-year 18100.00 434.89 458.64 449.12 458.67 0.000033 0.86 14015.30 1597.96 0.05
Reach1 25499 100-year 20200.00 434.89 458.71 449.68 458.75 0.000040 0.95 14125.61 1611.25 0.06
Reach1 25499 OLD 500-year 36200.00 434.89 462.67 453.11 462.73 0.000041 0.98 20849.56 2243.74 0.05
Reach1 25499 NEW 500-year 55500.00 434.89 466.26 456.49 466.35 0.000042 1.06 27106.13 2316.62 0.05
Reach1 25356 2-year 8100.00 437.30 454.02 445.31 454.20 0.000555 3.38 2407.93 1403.17 0.19
Reach1 25356 5-year 11900.00 437.30 456.18 446.93 456.41 0.000663 3.82 3105.09 1541.42 0.23
Reach1 25356 10-year 14400.00 437.30 457.43 447.78 457.68 0.000699 3.99 3591.45 1591.72 0.23
Reach1 25356 25-year 16500.00 437.30 458.22 448.45 458.25 0.000043 0.99 13091.50 1653.05 0.06
Reach1 25356 50-year 18100.00 437.30 458.64 448.94 458.66 0.000044 1.01 13785.91 1693.96 0.06
Reach1 25356 100-year 20200.00 437.30 458.70 449.54 458.74 0.000054 1.11 13900.64 1696.11 0.07
Reach1 25356 OLD 500-year 36200.00 437.30 462.67 453.08 462.72 0.000053 1.15 21009.47 2345.05 0.06
Reach1 25356 NEW 500-year 55500.00 437.30 466.26 456.72 466.34 0.000052 1.21 27686.45 2345.05 0.05
Reach1 25168 2-year 8100.00 436.92 453.92 444.99 454.09 0.000569 3.30 2461.44 1427.71 0.18
Reach1 25168 5-year 11900.00 436.92 456.06 446.66 456.27 0.000696 3.72 3182.81 1623.42 0.24
Reach1 25168 10-year 14400.00 436.92 457.31 447.57 457.54 0.000734 3.79 3755.73 1700.33 0.24
Reach1 25168 25-year 16500.00 436.92 458.21 448.21 458.24 0.000048 0.98 13471.42 1727.58 0.06
Reach1 25168 50-year 18100.00 436.92 458.63 448.66 458.66 0.000050 0.99 14188.51 1733.50 0.06
Reach1 25168 100-year 20200.00 436.92 458.69 449.24 458.73 0.000061 1.10 14303.05 1736.11 0.06
Reach1 25168 OLD 500-year 36200.00 436.92 462.66 452.79 462.71 0.000058 1.15 21394.46 2374.90 0.06
Reach1 25168 NEW 500-year 55500.00 436.92 466.26 456.81 466.33 0.000057 1.23 28022.32 2374.90 0.05
Reach1 24947 2-year 8100.00 439.15 453.56 446.60 453.91 0.000934 4.80 1713.03 1309.60 0.26
Reach1 24947 5-year 11900.00 439.15 455.55 448.29 456.05 0.001217 5.71 2105.90 1405.67 0.30
Reach1 24947 10-year 14400.00 439.15 456.71 449.21 457.29 0.001308 6.17 2352.95 1451.35 0.32
Reach1 24947 25-year 16500.00 439.15 457.48 449.88 458.14 0.001420 6.58 2525.74 1492.19 0.33
Reach1 24947 50-year 18100.00 439.15 457.80 450.40 458.55 0.001588 7.01 2598.09 1513.08 0.35
Reach1 24947 100-year 20200.00 439.15 457.63 451.02 458.59 0.002057 7.95 2558.84 1503.36 0.40
Reach1 24947 OLD 500-year 36200.00 439.15 462.64 455.22 462.69 0.000070 1.76 18953.06 2180.90 0.08
Reach1 24947 NEW 500-year 55500.00 439.15 466.24 458.97 466.31 0.000065 1.93 25324.94 2208.68 0.08
Reach1 24748 2-year 8100.00 439.16 453.47 447.24 453.70 0.000847 3.76 2138.34 1322.52 0.22
Reach1 24748 5-year 11900.00 439.16 455.46 448.42 455.77 0.001006 4.38 2679.16 1439.82 0.24
Reach1 24748 10-year 14400.00 439.16 456.63 449.12 456.99 0.001070 4.69 3023.84 1497.21 0.25
Reach1 24748 25-year 16500.00 439.16 457.41 449.66 457.81 0.001152 4.95 3276.80 1539.25 0.27
Reach1 24748 50-year 18100.00 439.16 457.72 450.05 458.18 0.001277 5.26 3382.19 1565.19 0.28
Reach1 24748 100-year 20200.00 439.16 457.52 450.55 458.11 0.001676 5.99 3314.47 1542.81 0.32
Reach1 24748 OLD 500-year 36200.00 439.16 462.62 453.71 462.68 0.000075 1.49 19367.38 2222.52 0.07
Reach1 24748 NEW 500-year 55500.00 439.16 466.22 456.91 466.30 0.000070 1.58 25838.23 2226.06 0.06
Reach1 24519 2-year 8100.00 438.91 453.35 445.17 453.53 0.000557 3.45 2370.00 1163.96 0.19
Reach1 24519 5-year 11900.00 438.91 455.30 446.58 455.57 0.000700 4.14 2893.58 1291.66 0.22
Reach1 24519 10-year 14400.00 438.91 456.46 447.38 456.77 0.000762 4.46 3242.98 1389.99 0.24
Reach1 24519 25-year 16600.00 438.91 457.65 448.04 457.68 0.000026 0.84 13215.57 1551.51 0.05
Reach1 24519 50-year 18200.00 438.91 458.00 448.48 458.03 0.000028 0.88 13694.86 1637.49 0.05
Reach1 24519 100-year 20300.00 438.91 457.88 449.07 457.92 0.000036 1.00 13530.76 1606.37 0.06
Reach1 24519 OLD 500-year 36200.00 438.91 462.61 452.46 462.67 0.000034 1.03 20576.46 2125.88 0.05
Reach1 24519 NEW 500-year 55500.00 438.91 466.20 455.92 466.29 0.000039 1.18 26130.45 2139.99 0.05
Reach1 24264 2-year 8100.00 439.27 453.10 446.34 453.36 0.000753 4.01 1981.63 1161.46 0.22
Reach1 24264 5-year 11900.00 439.27 454.98 447.85 455.36 0.000880 4.82 2412.52 1192.61 0.25
Reach1 24264 10-year 14400.00 439.27 456.09 448.67 456.54 0.000930 5.27 2683.22 1219.71 0.26
Reach1 24264 25-year 16600.00 439.27 457.10 449.41 457.61 0.000938 5.57 2946.04 1304.65 0.26
Reach1 24264 50-year 18200.00 439.27 457.37 449.82 457.95 0.001052 5.97 3020.04 1380.79 0.28
Reach1 24264 100-year 20300.00 439.27 457.05 450.31 457.82 0.001421 6.84 2932.04 1298.81 0.33
Reach1 24264 OLD 500-year 36200.00 439.27 462.60 453.60 462.65 0.000032 1.29 20108.85 2109.13 0.05
Reach1 24264 NEW 500-year 55500.00 439.27 466.19 456.79 466.27 0.000037 1.55 25259.83 2120.08 0.06
Reach1 24198 2-year 8100.00 439.10 453.05 446.32 453.31 0.000656 4.03 1992.41 1162.97 0.22
Reach1 24198 5-year 11900.00 439.10 454.91 447.57 455.30 0.000812 4.94 2387.50 1187.35 0.24
Reach1 24198 10-year 14400.00 439.10 456.01 448.31 456.48 0.000885 5.41 2627.86 1206.41 0.26
Reach1 24198 25-year 16600.00 439.10 457.02 448.92 457.55 0.000905 5.74 2872.40 1339.09 0.26
Reach1 24198 50-year 18200.00 439.10 457.27 449.36 457.88 0.001021 6.17 2939.26 1417.21 0.28
Reach1 24198 100-year 20300.00 439.10 457.56 449.90 457.59 0.000037 1.19 13162.09 1463.88 0.05
Reach1 24198 OLD 500-year 36200.00 439.10 462.60 453.29 462.65 0.000031 1.31 20640.96 2059.29 0.05
Reach1 24198 NEW 500-year 55500.00 439.10 466.19 456.72 466.27 0.000035 1.57 26105.87 2076.76 0.06
Reach1 24099 2-year 8100.00 440.51 452.74 447.30 453.20 0.001341 5.49 1494.98 1164.92 0.31
Reach1 24099 5-year 11900.00 440.51 454.48 448.77 455.16 0.001683 6.69 1798.72 1195.22 0.35
Reach1 24099 10-year 14400.00 440.51 455.50 449.62 456.32 0.001801 7.34 1992.03 1220.40 0.37
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 24099 25-year 16600.00 440.51 456.47 450.33 457.38 0.001820 7.76 2189.67 1249.66 0.38
Reach1 24099 50-year 18200.00 440.51 456.62 450.83 457.69 0.002098 8.40 2221.89 1260.78 0.40
Reach1 24099 100-year 20300.00 440.51 457.55 451.45 457.59 0.000036 1.14 13178.48 1438.82 0.05
Reach1 24099 OLD 500-year 36200.00 440.51 462.60 455.38 462.65 0.000030 1.28 21023.55 2144.53 0.05
Reach1 24099 NEW 500-year 55500.00 440.51 466.19 457.19 466.26 0.000034 1.53 26793.83 2144.53 0.06
Reach1 24058 2-year 8100.00 441.26 452.50 448.00 453.13 0.001760 6.13 1285.22 1178.75 0.35
Reach1 24058 5-year 11900.00 441.26 454.13 449.55 455.06 0.002195 7.41 1548.24 1209.05 0.40
Reach1 24058 10-year 14400.00 441.26 455.10 450.44 456.21 0.002400 8.06 1712.08 1225.24 0.42
Reach1 24058 25-year 16600.00 441.26 456.04 451.17 457.27 0.002438 8.43 1884.00 1255.75 0.43
Reach1 24058 50-year 18200.00 441.26 456.09 451.67 457.56 0.002886 9.20 1893.82 1256.98 0.46
Reach1 24058 100-year 20300.00 441.26 457.55 452.32 457.59 0.000033 1.06 13341.65 1425.94 0.05
Reach1 24058 OLD 500-year 36200.00 441.26 462.60 456.51 462.65 0.000029 1.23 20420.38 2157.34 0.05
Reach1 24058 NEW 500-year 55500.00 441.26 466.18 457.35 466.26 0.000033 1.47 25600.21 2157.34 0.05
Reach1 23868 2-year 8100.00 439.57 452.37 447.21 452.78 0.001230 5.18 1567.97 1193.18 0.29
Reach1 23868 5-year 11900.00 439.57 454.00 448.58 454.62 0.001549 6.31 1877.36 1229.49 0.34
Reach1 23868 10-year 14400.00 439.57 454.96 449.36 455.72 0.001759 6.86 2072.40 1268.56 0.36
Reach1 23868 25-year 16600.00 439.57 455.93 450.00 456.76 0.001738 7.20 2286.14 1293.56 0.36
Reach1 23868 50-year 18200.00 439.57 457.08 450.45 457.11 0.000029 0.99 13109.76 1371.76 0.05
Reach1 23868 100-year 20300.00 439.57 457.55 451.01 457.58 0.000032 1.05 13757.00 1378.95 0.05
Reach1 23868 OLD 500-year 36200.00 439.57 462.60 454.68 462.64 0.000027 1.20 23127.84 2200.84 0.05
Reach1 23868 NEW 500-year 55500.00 439.57 466.20 456.60 466.25 0.000030 1.43 31045.57 2200.84 0.05
Reach1 23835 Bridge
Reach1 23802 2-year 8100.00 438.88 452.43 445.21 452.69 0.000635 4.13 1974.03 1091.42 0.22
Reach1 23802 5-year 11900.00 438.88 454.08 446.52 454.49 0.000866 5.20 2301.71 1166.89 0.26
Reach1 23802 10-year 14400.00 438.88 455.06 447.30 455.57 0.000980 5.78 2512.73 1199.17 0.28
Reach1 23802 25-year 16600.00 438.88 455.84 447.93 456.44 0.001065 6.25 2692.22 1216.92 0.29
Reach1 23802 50-year 18200.00 438.88 456.35 448.36 457.02 0.001126 6.58 2816.84 1233.56 0.30
Reach1 23802 100-year 20300.00 438.88 457.52 448.91 457.56 0.000035 1.23 13114.45 1340.30 0.05
Reach1 23802 OLD 500-year 36200.00 438.88 462.59 452.56 462.63 0.000031 1.37 22645.65 2276.32 0.05
Reach1 23802 NEW 500-year 55500.00 438.88 466.19 456.18 466.24 0.000034 1.61 30834.23 2276.32 0.06
Reach1 23628 2-year 8100.00 438.78 452.32 445.00 452.58 0.000645 4.23 1986.45 500.94 0.22
Reach1 23628 5-year 11900.00 438.78 453.92 446.33 454.34 0.000902 5.32 2302.66 533.14 0.26
Reach1 23628 10-year 14400.00 438.78 454.88 447.11 455.40 0.001039 5.91 2499.16 561.13 0.28
Reach1 23628 25-year 16600.00 438.78 455.64 447.75 456.25 0.001135 6.40 2662.57 739.96 0.30
Reach1 23628 50-year 18200.00 438.78 456.14 448.19 456.82 0.001203 6.75 2803.21 890.66 0.31
Reach1 23628 100-year 20300.00 438.78 456.70 448.75 457.47 0.001307 7.21 2985.87 995.58 0.32
Reach1 23628 OLD 500-year 36200.00 438.78 462.54 452.43 462.62 0.000148 3.01 16830.34 2441.50 0.12
Reach1 23628 NEW 500-year 55500.00 438.78 466.14 456.13 466.23 0.000138 3.22 25630.26 2441.50 0.11
Reach1 23506 2-year 8100.00 438.40 452.24 444.84 452.50 0.000659 4.13 1978.24 189.08 0.22
Reach1 23506 5-year 11900.00 438.40 453.80 446.14 454.23 0.000922 5.28 2278.62 196.00 0.26
Reach1 23506 10-year 14400.00 438.40 454.73 446.88 455.26 0.001074 5.92 2463.12 201.61 0.29
Reach1 23506 25-year 16600.00 438.40 455.46 447.53 456.10 0.001205 6.44 2614.85 290.87 0.31
Reach1 23506 50-year 18200.00 438.40 455.95 447.97 456.66 0.001283 6.80 2720.99 366.50 0.32
Reach1 23506 100-year 20300.00 438.40 456.48 448.52 457.29 0.001405 7.29 2857.54 585.42 0.33
Reach1 23506 OLD 500-year 36200.00 438.40 461.18 452.24 462.46 0.001597 9.33 4517.91 2572.37 0.37
Reach1 23506 NEW 500-year 55500.00 438.40 463.95 456.01 465.99 0.002201 11.97 5598.85 2587.81 0.45
Reach1 23413 2-year 8100.00 439.32 452.12 445.31 452.43 0.000800 4.54 1836.05 183.80 0.24
Reach1 23413 5-year 11900.00 439.32 453.62 446.65 454.12 0.001120 5.78 2117.81 190.67 0.29
Reach1 23413 10-year 14400.00 439.32 454.52 447.44 455.15 0.001304 6.47 2290.73 209.48 0.32
Reach1 23413 25-year 16600.00 439.32 455.23 448.10 455.97 0.001471 7.03 2431.34 269.42 0.34
Reach1 23413 50-year 18200.00 439.32 455.69 448.55 456.52 0.001577 7.42 2526.71 304.66 0.35
Reach1 23413 100-year 20300.00 439.32 456.19 449.18 457.14 0.001732 7.95 2631.56 334.94 0.37
Reach1 23413 OLD 500-year 36200.00 439.32 460.74 452.94 462.27 0.001997 10.26 3937.53 2648.93 0.42
Reach1 23413 NEW 500-year 55500.00 439.32 463.07 456.69 465.69 0.002988 13.56 4683.78 2726.08 0.52
Reach1 23229 2-year 8100.00 438.53 452.07 443.93 452.28 0.000516 3.74 2184.09 204.08 0.19
Reach1 23229 5-year 11900.00 438.53 453.56 445.24 453.91 0.000743 4.83 2494.07 211.79 0.24
Reach1 23229 10-year 14400.00 438.53 454.45 446.00 454.90 0.000874 5.43 2684.44 216.88 0.26
Reach1 23229 25-year 16600.00 438.53 455.15 446.63 455.69 0.000983 5.93 2838.58 225.74 0.28
Reach1 23229 50-year 18200.00 438.53 455.61 447.07 456.22 0.001055 6.28 2948.09 270.90 0.29
Reach1 23229 100-year 20300.00 438.53 456.10 447.60 456.80 0.001167 6.75 3076.35 387.84 0.31
Reach1 23229 OLD 500-year 36200.00 438.53 460.71 451.21 461.84 0.001385 8.79 4708.91 2845.63 0.35
Reach1 23229 NEW 500-year 55500.00 438.53 463.10 454.83 465.03 0.002069 11.59 5657.24 2884.07 0.43
Reach1 23198 2-year 8100.00 438.41 452.07 444.04 452.26 0.000471 3.55 2304.75 220.60 0.19
Reach1 23198 5-year 11900.00 438.41 453.56 445.27 453.88 0.000683 4.56 2642.69 231.91 0.23
Reach1 23198 10-year 14400.00 438.41 454.46 446.01 454.86 0.000823 5.11 2855.31 243.79 0.25
Reach1 23198 25-year 16600.00 438.41 455.17 446.58 455.64 0.000937 5.55 3045.60 296.97 0.27
Reach1 23198 50-year 18200.00 438.41 455.64 446.99 456.16 0.000994 5.85 3188.21 372.77 0.28
Reach1 23198 100-year 20300.00 438.41 456.14 447.52 456.74 0.001087 6.27 3345.69 459.81 0.29
Reach1 23198 OLD 500-year 36200.00 438.41 460.81 450.95 461.74 0.001203 7.98 5156.27 2878.25 0.33
Reach1 23198 NEW 500-year 55500.00 438.41 463.30 454.57 464.86 0.001734 10.41 6206.25 2908.14 0.40
Reach1 23063 2-year 8100.00 438.22 452.05 443.49 452.18 0.000398 2.99 2782.41 304.64 0.16
Reach1 23063 5-year 11900.00 438.22 453.55 444.68 453.77 0.000543 3.77 3255.77 327.02 0.20
Reach1 23063 10-year 14400.00 438.22 454.45 445.41 454.72 0.000617 4.19 3562.47 356.47 0.21
Reach1 23063 25-year 16600.00 438.22 455.17 445.98 455.48 0.000677 4.52 3826.67 382.80 0.23
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 23063 50-year 18200.00 438.22 455.65 446.38 455.99 0.000719 4.74 4015.08 481.40 0.24
Reach1 23063 100-year 20300.00 438.22 456.16 446.88 456.55 0.000786 5.05 4226.22 573.47 0.25
Reach1 23063 OLD 500-year 36200.00 438.22 460.93 450.27 461.50 0.000870 6.24 6479.72 2965.88 0.26
Reach1 23063 NEW 500-year 55500.00 438.22 463.53 453.24 464.48 0.001247 8.05 7767.33 2985.57 0.32
Reach1 22997 2-year 8100.00 437.32 452.02 443.59 452.16 0.000400 3.05 2726.68 295.40 0.17
Reach1 22997 5-year 11900.00 437.32 453.50 444.82 453.73 0.000555 3.86 3182.71 317.00 0.20
Reach1 22997 10-year 14400.00 437.32 454.40 445.51 454.68 0.000637 4.29 3472.47 332.07 0.22
Reach1 22997 25-year 16600.00 437.32 455.11 446.10 455.43 0.000704 4.63 3714.59 367.20 0.23
Reach1 22997 50-year 18200.00 437.32 455.58 446.50 455.94 0.000751 4.86 3885.30 446.06 0.24
Reach1 22997 100-year 20300.00 437.32 456.10 447.00 456.49 0.000833 5.14 4110.33 633.11 0.29
Reach1 22997 OLD 500-year 36200.00 437.32 460.93 450.25 461.41 0.000859 5.75 7184.93 3010.69 0.26
Reach1 22997 NEW 500-year 55500.00 437.32 463.60 453.38 464.33 0.001175 7.14 9006.52 3043.04 0.30
Reach1 22795 2-year 8100.00 437.82 451.93 443.72 452.07 0.000470 3.23 2727.70 302.12 0.18
Reach1 22795 5-year 11900.00 437.82 453.38 444.87 453.61 0.000659 4.10 3183.13 327.83 0.22
Reach1 22795 10-year 14400.00 437.82 454.25 445.57 454.54 0.000746 4.60 3479.85 425.57 0.24
Reach1 22795 25-year 16600.00 437.82 454.94 446.13 455.28 0.000828 5.03 3741.17 562.78 0.25
Reach1 22795 50-year 18200.00 437.82 455.40 446.51 455.77 0.000882 5.32 3932.41 645.72 0.26
Reach1 22795 100-year 20300.00 437.82 455.87 447.00 456.31 0.000975 5.73 4150.98 737.10 0.28
Reach1 22795 OLD 500-year 36200.00 437.82 460.63 450.14 461.22 0.000950 6.94 6867.74 3011.26 0.29
Reach1 22795 NEW 500-year 55500.00 437.82 463.17 453.28 464.07 0.001248 8.69 8418.74 3033.95 0.34
Reach1 22616 2-year 8100.00 437.48 451.87 443.22 451.99 0.000376 3.02 2910.78 307.26 0.17
Reach1 22616 5-year 11900.00 437.48 453.29 444.42 453.50 0.000540 3.87 3363.03 328.24 0.20
Reach1 22616 10-year 14400.00 437.48 454.15 445.08 454.41 0.000648 4.40 3652.74 405.04 0.22
Reach1 22616 25-year 16600.00 437.48 454.82 445.65 455.13 0.000716 4.77 3898.95 444.24 0.24
Reach1 22616 50-year 18200.00 437.48 455.28 446.03 455.62 0.000761 5.04 4071.75 530.99 0.24
Reach1 22616 100-year 20300.00 437.48 455.74 446.52 456.14 0.000839 5.42 4258.40 668.18 0.26
Reach1 22616 OLD 500-year 36200.00 437.48 460.48 449.77 461.06 0.000860 6.69 6527.03 2969.67 0.27
Reach1 22616 NEW 500-year 55500.00 437.48 462.92 452.58 463.86 0.001208 8.61 7774.89 3009.76 0.33
Reach1 22424 2-year 8100.00 436.77 451.80 442.78 451.92 0.000369 2.98 2918.97 295.08 0.16
Reach1 22424 5-year 11900.00 436.77 453.19 444.21 453.40 0.000537 3.86 3344.18 321.32 0.20
Reach1 22424 10-year 14400.00 436.77 454.02 444.89 454.29 0.000628 4.38 3628.20 416.61 0.22
Reach1 22424 25-year 16600.00 436.77 454.69 445.47 455.00 0.000701 4.79 3901.52 478.88 0.23
Reach1 22424 50-year 18200.00 436.77 455.13 445.85 455.48 0.000754 5.08 4092.93 516.61 0.24
Reach1 22424 100-year 20300.00 436.77 455.56 446.34 455.98 0.000861 5.54 4293.66 574.05 0.26
Reach1 22424 OLD 500-year 36200.00 436.77 460.33 449.42 460.89 0.000872 6.78 7307.04 2917.66 0.28
Reach1 22424 NEW 500-year 55500.00 436.77 462.75 452.39 463.61 0.001174 8.53 8971.18 2990.28 0.33
Reach1 22211 2-year 8100.00 437.17 451.69 442.87 451.83 0.000431 3.22 2755.97 295.05 0.18
Reach1 22211 5-year 11900.00 437.17 453.03 444.20 453.26 0.000638 4.14 3146.89 310.57 0.22
Reach1 22211 10-year 14400.00 437.17 453.84 444.93 454.14 0.000753 4.63 3429.05 325.67 0.24
Reach1 22211 25-year 16600.00 437.17 454.47 445.53 454.82 0.000876 5.10 3656.01 396.26 0.26
Reach1 22211 50-year 18200.00 437.17 454.90 445.94 455.29 0.000945 5.37 3839.57 458.34 0.27
Reach1 22211 100-year 20300.00 437.17 455.32 446.45 455.77 0.001057 5.76 4056.73 565.02 0.28
Reach1 22211 OLD 500-year 36200.00 437.17 460.26 449.74 460.61 0.000838 5.82 12171.68 2596.74 0.26
Reach1 22211 NEW 500-year 55500.00 437.17 462.81 452.98 463.15 0.000793 6.27 18823.25 2610.61 0.26
Reach1 22146 Bridge
Reach1 22080 2-year 8100.00 437.34 451.60 442.84 451.75 0.000441 3.27 2706.04 278.23 0.18
Reach1 22080 5-year 11900.00 437.34 452.89 444.11 453.14 0.000666 4.23 3073.91 363.85 0.22
Reach1 22080 10-year 14400.00 437.34 453.67 444.85 453.99 0.000797 4.77 3303.94 497.97 0.24
Reach1 22080 25-year 16600.00 437.34 454.23 445.45 454.61 0.000921 5.23 3474.49 627.29 0.26
Reach1 22080 50-year 18200.00 437.34 454.62 445.88 455.05 0.001009 5.54 3595.37 652.31 0.28
Reach1 22080 100-year 20300.00 437.34 454.98 446.41 455.48 0.001154 5.99 3710.10 675.57 0.30
Reach1 22080 OLD 500-year 36200.00 437.34 458.31 449.72 459.25 0.001825 8.32 4917.60 1545.19 0.38
Reach1 22080 NEW 500-year 55500.00 437.34 462.11 453.04 462.60 0.001024 7.18 16453.94 2610.63 0.30
Reach1 21822 2-year 8100.00 436.66 451.52 442.29 451.64 0.000304 2.91 3094.51 325.01 0.15
Reach1 21822 5-year 11900.00 436.66 452.78 443.51 452.97 0.000454 3.81 3548.87 448.23 0.19
Reach1 21822 10-year 14400.00 436.66 453.54 444.22 453.78 0.000539 4.32 3879.27 503.56 0.21
Reach1 21822 25-year 16600.00 436.66 454.08 444.80 454.38 0.000621 4.75 4130.05 612.45 0.22
Reach1 21822 50-year 18200.00 436.66 454.46 445.23 454.79 0.000678 5.06 4318.90 784.95 0.23
Reach1 21822 100-year 20300.00 436.66 454.80 445.71 455.19 0.000772 5.48 4504.34 910.26 0.25
Reach1 21822 OLD 500-year 36200.00 436.66 458.10 448.87 458.75 0.001054 7.32 6585.28 2084.98 0.30
Reach1 21822 NEW 500-year 55500.00 436.66 461.27 451.93 462.18 0.001251 8.88 8670.57 2443.27 0.34
Reach1 21798 2-year 8100.00 436.57 451.52 442.19 451.63 0.000296 2.83 3194.17 353.42 0.15
Reach1 21798 5-year 11900.00 436.57 452.78 443.38 452.96 0.000439 3.70 3640.75 432.36 0.18
Reach1 21798 10-year 14400.00 436.57 453.54 444.14 453.77 0.000514 4.16 3971.55 537.44 0.20
Reach1 21798 25-year 16600.00 436.57 454.08 444.72 454.36 0.000586 4.56 4226.22 589.89 0.22
Reach1 21798 50-year 18200.00 436.57 454.46 445.10 454.76 0.000634 4.84 4411.21 783.27 0.23
Reach1 21798 100-year 20300.00 436.57 454.80 445.59 455.16 0.000719 5.23 4584.07 914.83 0.24
Reach1 21798 OLD 500-year 36200.00 436.57 458.09 448.67 458.72 0.001020 7.13 6346.81 2019.76 0.30
Reach1 21798 NEW 500-year 55500.00 436.57 461.27 451.66 462.14 0.001202 8.64 8356.32 2483.14 0.33
Reach1 21611 2-year 8100.00 437.00 451.47 441.72 451.57 0.000298 2.72 3226.44 405.97 0.15
Reach1 21611 5-year 11900.00 437.00 452.70 443.00 452.87 0.000449 3.57 3646.51 491.97 0.18
Reach1 21611 10-year 14400.00 437.00 453.44 443.60 453.67 0.000537 4.07 3917.15 580.04 0.20
Reach1 21611 25-year 16600.00 437.00 453.96 444.34 454.24 0.000624 4.50 4117.11 765.97 0.22
Reach1 21611 50-year 18200.00 437.00 454.33 444.74 454.64 0.000678 4.79 4262.87 893.13 0.23
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 21611 100-year 20300.00 437.00 454.65 445.20 455.02 0.000774 5.19 4396.23 1043.92 0.25
Reach1 21611 OLD 500-year 36200.00 437.00 457.83 448.32 458.51 0.001126 7.21 5965.33 1957.79 0.31
Reach1 21611 NEW 500-year 55500.00 437.00 460.85 451.44 461.88 0.001407 8.99 7577.33 2427.51 0.36
Reach1 21558 2-year 8100.00 436.49 451.46 441.68 451.56 0.000280 2.68 3312.53 349.03 0.14
Reach1 21558 5-year 11900.00 436.49 452.68 442.87 452.85 0.000420 3.52 3754.82 484.02 0.18
Reach1 21558 10-year 14400.00 436.49 453.42 443.58 453.64 0.000496 3.98 4047.92 855.82 0.20
Reach1 21558 25-year 16600.00 436.49 453.94 444.12 454.20 0.000570 4.38 4265.81 1008.74 0.21
Reach1 21558 50-year 18200.00 436.49 454.31 444.53 454.60 0.000621 4.66 4424.43 1069.72 0.22
Reach1 21558 100-year 20300.00 436.49 454.62 445.02 454.97 0.000711 5.06 4566.85 1161.99 0.24
Reach1 21558 OLD 500-year 36200.00 436.49 457.79 448.02 458.45 0.001055 7.06 6063.38 1923.62 0.30
Reach1 21558 NEW 500-year 55500.00 436.49 460.79 451.18 461.80 0.001352 8.90 7526.30 2014.12 0.35
Reach1 21416 2-year 8100.00 436.25 451.41 442.06 451.51 0.000318 2.77 3143.68 328.76 0.15
Reach1 21416 5-year 11900.00 436.25 452.60 443.19 452.78 0.000492 3.62 3551.96 356.18 0.19
Reach1 21416 10-year 14400.00 436.25 453.32 443.94 453.56 0.000595 4.09 3817.23 382.14 0.21
Reach1 21416 25-year 16600.00 436.25 453.83 444.51 454.11 0.000707 4.52 4014.39 627.92 0.23
Reach1 21416 50-year 18200.00 436.25 454.18 444.89 454.50 0.000774 4.79 4165.14 901.90 0.24
Reach1 21416 100-year 20300.00 436.25 454.48 445.37 454.86 0.000883 5.20 4299.62 1027.80 0.26
Reach1 21416 OLD 500-year 36200.00 436.25 457.58 448.51 458.28 0.001255 7.20 5761.29 1798.98 0.32
Reach1 21416 NEW 500-year 55500.00 436.25 460.52 451.61 461.59 0.001567 9.03 7197.66 1917.62 0.37
Reach1 21354 2-year 8100.00 436.19 451.39 441.93 451.49 0.000272 2.75 3305.32 348.48 0.14
Reach1 21354 5-year 11900.00 436.19 452.58 443.10 452.75 0.000411 3.60 3748.62 492.99 0.18
Reach1 21354 10-year 14400.00 436.19 453.30 443.78 453.52 0.000491 4.07 4096.20 706.89 0.20
Reach1 21354 25-year 16600.00 436.19 453.80 444.29 454.06 0.000568 4.47 4353.71 836.57 0.22
Reach1 21354 50-year 18200.00 436.19 454.16 444.67 454.45 0.000620 4.74 4538.58 1047.70 0.23
Reach1 21354 100-year 20300.00 436.19 454.45 445.14 454.79 0.000712 5.14 4698.48 1228.57 0.25
Reach1 21354 OLD 500-year 36200.00 436.19 457.57 448.18 458.17 0.001041 6.98 6536.73 1610.75 0.31
Reach1 21354 NEW 500-year 55500.00 436.19 460.56 451.08 461.44 0.001297 8.58 8368.74 1693.07 0.35
Reach1 21275 2-year 8100.00 436.88 451.38 442.00 451.47 0.000253 2.34 3476.62 471.16 0.13
Reach1 21275 5-year 11900.00 436.88 452.57 443.14 452.71 0.000386 3.06 3917.64 581.82 0.16
Reach1 21275 10-year 14400.00 436.88 453.28 443.80 453.47 0.000465 3.46 4190.31 719.56 0.18
Reach1 21275 25-year 16600.00 436.88 453.78 444.34 454.01 0.000543 3.81 4382.13 826.72 0.19
Reach1 21275 50-year 18200.00 436.88 454.13 444.71 454.39 0.000596 4.06 4517.36 909.35 0.20
Reach1 21275 100-year 20300.00 436.88 454.42 445.16 454.72 0.000687 4.42 4634.55 1030.09 0.22
Reach1 21275 OLD 500-year 36200.00 436.88 457.50 448.29 458.08 0.001052 6.19 6224.05 1573.42 0.28
Reach1 21275 NEW 500-year 55500.00 436.88 460.43 450.82 461.33 0.001359 7.77 7816.52 1621.44 0.32
Reach1 21169 2-year 8100.00 436.83 451.36 441.32 451.44 0.000193 2.36 3447.14 360.02 0.12
Reach1 21169 5-year 11900.00 436.83 452.52 442.34 452.67 0.000304 3.15 3811.30 489.90 0.15
Reach1 21169 10-year 14400.00 436.83 453.22 442.94 453.42 0.000372 3.61 4040.00 595.47 0.17
Reach1 21169 25-year 16600.00 436.83 453.71 443.45 453.95 0.000440 4.01 4200.68 751.85 0.19
Reach1 21169 50-year 18200.00 436.83 454.04 443.78 454.33 0.000488 4.29 4314.02 848.48 0.20
Reach1 21169 100-year 20300.00 436.83 454.31 444.22 454.65 0.000569 4.70 4407.04 963.79 0.22
Reach1 21169 OLD 500-year 36200.00 436.83 457.23 447.07 457.96 0.000965 6.90 5543.97 1492.54 0.29
Reach1 21169 NEW 500-year 55500.00 436.83 459.91 450.01 461.15 0.001379 9.06 6644.99 1597.53 0.35
Reach1 21059 2-year 8100.00 436.24 451.31 441.56 451.42 0.000249 2.61 3124.45 295.94 0.14
Reach1 21059 5-year 11900.00 436.24 452.45 442.70 452.63 0.000397 3.47 3461.19 453.73 0.17
Reach1 21059 10-year 14400.00 436.24 453.13 443.39 453.37 0.000486 3.97 3690.57 642.79 0.19
Reach1 21059 25-year 16600.00 436.24 453.60 443.95 453.89 0.000574 4.40 3854.47 842.05 0.21
Reach1 21059 50-year 18200.00 436.24 453.92 444.35 454.26 0.000637 4.71 3972.55 957.68 0.22
Reach1 21059 100-year 20300.00 436.24 454.17 444.85 454.58 0.000746 5.15 4072.98 1057.29 0.24
Reach1 21059 OLD 500-year 36200.00 436.24 457.01 447.98 457.83 0.001236 7.42 5400.09 1406.31 0.32
Reach1 21059 NEW 500-year 55500.00 436.24 459.64 450.95 460.98 0.001711 9.55 6714.00 1594.08 0.38
Reach1 20944 2-year 8100.00 436.35 451.30 441.48 451.38 0.000224 2.34 3482.43 335.97 0.12
Reach1 20944 5-year 11900.00 436.35 452.43 442.69 452.58 0.000356 3.10 3871.71 393.23 0.16
Reach1 20944 10-year 14400.00 436.35 453.11 443.41 453.31 0.000437 3.54 4118.46 666.90 0.18
Reach1 20944 25-year 16600.00 436.35 453.58 443.97 453.81 0.000517 3.92 4290.46 829.52 0.19
Reach1 20944 50-year 18200.00 436.35 453.90 444.34 454.17 0.000574 4.19 4413.98 899.81 0.20
Reach1 20944 100-year 20300.00 436.35 454.15 444.81 454.47 0.000673 4.59 4525.17 1002.59 0.22
Reach1 20944 OLD 500-year 36200.00 436.35 456.99 447.76 457.65 0.001126 6.60 5871.18 1392.28 0.29
Reach1 20944 NEW 500-year 55500.00 436.35 459.63 450.33 460.71 0.001576 8.51 7167.37 1612.20 0.34
Reach1 20873 2-year 8100.00 436.53 451.29 441.99 451.37 0.000254 2.26 3599.61 372.84 0.13
Reach1 20873 5-year 11900.00 436.53 452.41 443.10 452.55 0.000396 2.98 4027.08 411.86 0.16
Reach1 20873 10-year 14400.00 436.53 453.09 443.73 453.27 0.000481 3.38 4299.81 675.39 0.17
Reach1 20873 25-year 16600.00 436.53 453.55 444.23 453.77 0.000567 3.74 4488.09 877.02 0.19
Reach1 20873 50-year 18200.00 436.53 453.87 444.57 454.12 0.000628 3.99 4620.92 932.61 0.20
Reach1 20873 100-year 20300.00 436.53 454.12 445.00 454.41 0.000734 4.36 4724.27 1008.77 0.21
Reach1 20873 OLD 500-year 36200.00 436.53 456.95 447.75 457.55 0.001212 6.25 5997.10 1255.58 0.28
Reach1 20873 NEW 500-year 55500.00 436.53 459.59 450.43 460.57 0.001673 8.02 7216.48 1605.67 0.33
Reach1 20728 2-year 8100.00 436.68 451.28 441.01 451.33 0.000131 1.88 4366.28 418.15 0.10
Reach1 20728 5-year 11900.00 436.68 452.40 441.93 452.49 0.000209 2.50 4846.46 451.71 0.13
Reach1 20728 10-year 14400.00 436.68 453.08 442.46 453.20 0.000257 2.84 5181.94 536.79 0.14
Reach1 20728 25-year 16600.00 436.68 453.54 442.90 453.69 0.000304 3.14 5437.18 569.21 0.16
Reach1 20728 50-year 18200.00 436.68 453.86 443.20 454.03 0.000338 3.35 5626.04 604.72 0.17
Reach1 20728 100-year 20300.00 436.68 454.10 443.57 454.31 0.000396 3.66 5775.38 621.23 0.18
Reach1 20728 OLD 500-year 36200.00 436.68 456.96 446.09 457.36 0.000649 5.14 7679.95 1268.70 0.23
Reach1 20728 NEW 500-year 55500.00 436.68 459.66 448.65 460.29 0.000883 6.51 9527.44 1645.81 0.27
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 20616 2-year 8100.00 436.67 451.26 441.49 451.32 0.000149 1.92 4297.72 425.49 0.10
Reach1 20616 5-year 11900.00 436.67 452.37 442.40 452.47 0.000237 2.52 4795.79 465.49 0.13
Reach1 20616 10-year 14400.00 436.67 453.05 442.93 453.17 0.000288 2.86 5130.92 530.51 0.15
Reach1 20616 25-year 16600.00 436.67 453.50 443.36 453.65 0.000337 3.16 5386.11 636.50 0.17
Reach1 20616 50-year 18200.00 436.67 453.82 443.66 453.99 0.000372 3.36 5586.48 775.30 0.17
Reach1 20616 100-year 20300.00 436.67 454.06 444.05 454.26 0.000434 3.67 5745.96 1027.18 0.19
Reach1 20616 OLD 500-year 36200.00 436.67 456.89 446.52 457.28 0.000680 5.12 7755.09 1233.15 0.24
Reach1 20616 NEW 500-year 55500.00 436.67 459.59 448.99 460.17 0.000874 6.35 9885.11 1680.94 0.27
Reach1 20579 2-year 8100.00 436.69 451.26 441.31 451.31 0.000135 1.87 4398.54 443.55 0.10
Reach1 20579 5-year 11900.00 436.69 452.37 442.25 452.46 0.000215 2.45 4927.26 538.56 0.13
Reach1 20579 10-year 14400.00 436.69 453.04 442.78 453.16 0.000264 2.77 5326.52 636.68 0.15
Reach1 20579 25-year 16600.00 436.69 453.50 443.22 453.64 0.000311 3.05 5625.86 666.65 0.16
Reach1 20579 50-year 18200.00 436.69 453.81 443.52 453.97 0.000344 3.25 5838.47 677.50 0.17
Reach1 20579 100-year 20300.00 436.69 454.05 443.89 454.24 0.000403 3.54 5999.92 690.63 0.18
Reach1 20579 OLD 500-year 36200.00 436.69 456.89 446.37 457.25 0.000645 4.93 8039.03 1324.90 0.23
Reach1 20579 NEW 500-year 55500.00 436.69 459.57 448.86 460.13 0.000863 6.19 10052.11 1669.66 0.26
Reach1 20397 2-year 8100.00 436.09 451.19 440.77 451.28 0.000171 2.38 3658.31 368.22 0.11
Reach1 20397 5-year 11900.00 436.09 452.25 441.83 452.41 0.000281 3.21 4025.08 730.79 0.15
Reach1 20397 10-year 14400.00 436.09 452.89 442.48 453.09 0.000352 3.69 4301.80 971.20 0.17
Reach1 20397 25-year 16600.00 436.09 453.31 443.02 453.56 0.000422 4.12 4521.81 1098.72 0.18
Reach1 20397 50-year 18200.00 436.09 453.60 443.39 453.89 0.000474 4.42 4691.24 1167.22 0.20
Reach1 20397 100-year 20300.00 436.09 453.79 443.88 454.14 0.000563 4.85 4811.41 1221.22 0.21
Reach1 20397 OLD 500-year 36200.00 436.09 456.38 446.88 457.07 0.000975 7.03 6668.88 1486.01 0.29
Reach1 20397 NEW 500-year 55500.00 436.09 458.79 449.76 459.88 0.001365 9.01 8454.38 1552.80 0.35
Reach1 20314 2-year 8100.00 436.12 451.15 441.10 451.26 0.000264 2.63 3202.20 306.55 0.13
Reach1 20314 5-year 11900.00 436.12 452.18 442.21 452.37 0.000432 3.54 3521.97 341.37 0.17
Reach1 20314 10-year 14400.00 436.12 452.80 442.88 453.05 0.000541 4.08 3717.38 399.47 0.19
Reach1 20314 25-year 16600.00 436.12 453.20 443.42 453.51 0.000652 4.56 3853.15 480.13 0.21
Reach1 20314 50-year 18200.00 436.12 453.47 443.80 453.83 0.000734 4.89 3959.69 537.92 0.22
Reach1 20314 100-year 20300.00 436.12 453.63 444.26 454.07 0.000878 5.39 4029.79 585.19 0.24
Reach1 20314 OLD 500-year 36200.00 436.12 456.01 447.43 456.95 0.001601 8.00 5277.86 1244.34 0.33
Reach1 20314 NEW 500-year 55500.00 436.12 458.12 450.63 459.69 0.002386 10.54 6717.00 1520.76 0.42
Reach1 20224 2-year 8100.00 436.05 451.13 441.79 451.23 0.000284 2.56 3178.70 297.75 0.13
Reach1 20224 5-year 11900.00 436.05 452.15 442.89 452.33 0.000466 3.43 3485.89 309.88 0.17
Reach1 20224 10-year 14400.00 436.05 452.76 443.55 453.00 0.000584 3.94 3686.50 353.00 0.19
Reach1 20224 25-year 16600.00 436.05 453.15 444.08 453.45 0.000703 4.38 3832.93 402.11 0.21
Reach1 20224 50-year 18200.00 436.05 453.42 444.45 453.76 0.000788 4.69 3945.96 447.09 0.23
Reach1 20224 100-year 20300.00 436.05 453.57 444.93 453.98 0.000942 5.16 4017.52 482.80 0.25
Reach1 20224 OLD 500-year 36200.00 436.05 455.98 447.84 456.76 0.001543 7.27 5282.98 596.93 0.32
Reach1 20224 NEW 500-year 55500.00 436.05 458.22 450.70 459.37 0.002047 9.06 6737.60 1486.48 0.38
Reach1 20012 2-year 8100.00 436.55 451.11 441.24 451.17 0.000221 2.00 4090.49 377.28 0.10
Reach1 20012 5-year 11900.00 436.55 452.11 442.16 452.22 0.000363 2.68 4472.22 382.55 0.13
Reach1 20012 10-year 14400.00 436.55 452.72 442.69 452.86 0.000454 3.09 4708.15 399.70 0.15
Reach1 20012 25-year 16600.00 436.55 453.10 443.14 453.28 0.000547 3.45 4861.87 403.97 0.17
Reach1 20012 50-year 18200.00 436.55 453.36 443.45 453.57 0.000617 3.70 4974.34 484.18 0.18
Reach1 20012 100-year 20300.00 436.55 453.50 443.83 453.76 0.000740 4.08 5044.60 501.61 0.19
Reach1 20012 OLD 500-year 36200.00 436.55 455.85 446.37 456.38 0.001302 5.95 6385.49 1152.32 0.26
Reach1 20012 NEW 500-year 55500.00 436.55 458.04 448.90 458.87 0.001790 7.54 7740.43 1478.93 0.31
Reach1 19807 2-year 8100.00 436.65 451.08 440.56 451.13 0.000128 1.85 4432.30 418.63 0.10
Reach1 19807 5-year 11900.00 436.65 452.07 441.46 452.16 0.000214 2.48 4861.46 452.16 0.13
Reach1 19807 10-year 14400.00 436.65 452.66 441.99 452.79 0.000269 2.85 5147.45 502.68 0.14
Reach1 19807 25-year 16600.00 436.65 453.03 442.42 453.19 0.000326 3.18 5334.97 506.11 0.16
Reach1 19807 50-year 18200.00 436.65 453.29 442.73 453.47 0.000368 3.42 5463.88 508.11 0.17
Reach1 19807 100-year 20300.00 436.65 453.41 443.11 453.63 0.000444 3.77 5528.60 509.12 0.19
Reach1 19807 OLD 500-year 36200.00 436.65 455.67 445.58 456.16 0.000846 5.64 6704.56 636.19 0.26
Reach1 19807 NEW 500-year 55500.00 436.65 457.72 448.08 458.56 0.001304 7.49 7873.07 1138.57 0.32
Reach1 19742 2-year 8100.00 436.26 451.07 440.78 451.12 0.000131 1.83 4427.27 424.25 0.10
Reach1 19742 5-year 11900.00 436.26 452.05 441.67 452.15 0.000216 2.46 4856.81 470.93 0.13
Reach1 19742 10-year 14400.00 436.26 452.64 442.18 452.77 0.000271 2.83 5141.61 490.84 0.14
Reach1 19742 25-year 16600.00 436.26 453.01 442.61 453.17 0.000328 3.16 5323.30 496.87 0.15
Reach1 19742 50-year 18200.00 436.26 453.26 442.91 453.44 0.000371 3.39 5448.41 499.59 0.16
Reach1 19742 100-year 20300.00 436.26 453.38 443.29 453.60 0.000448 3.75 5509.31 500.69 0.18
Reach1 19742 OLD 500-year 36200.00 436.26 455.61 445.75 456.10 0.000855 5.64 6650.60 631.84 0.25
Reach1 19742 NEW 500-year 55500.00 436.26 457.61 448.19 458.47 0.001352 7.59 7795.12 1113.56 0.32
Reach1 19614 2-year 8100.00 436.14 451.05 440.84 451.11 0.000146 1.92 4257.02 383.67 0.10
Reach1 19614 5-year 11900.00 436.14 452.01 441.73 452.12 0.000244 2.60 4630.29 388.93 0.13
Reach1 19614 10-year 14400.00 436.14 452.59 442.27 452.73 0.000310 3.00 4864.11 426.61 0.15
Reach1 19614 25-year 16600.00 436.14 452.95 442.72 453.12 0.000378 3.36 5018.79 443.61 0.16
Reach1 19614 50-year 18200.00 436.14 453.19 443.02 453.39 0.000428 3.61 5126.91 451.71 0.17
Reach1 19614 100-year 20300.00 436.14 453.29 443.42 453.54 0.000520 4.00 5174.49 454.81 0.19
Reach1 19614 OLD 500-year 36200.00 436.14 455.41 445.95 455.97 0.001022 6.09 6188.18 751.53 0.27
Reach1 19614 NEW 500-year 55500.00 436.14 457.23 448.45 458.26 0.001653 8.26 7098.84 1351.41 0.35
Reach1 19421 2-year 8100.00 435.88 450.98 441.12 451.07 0.000235 2.36 3461.29 422.59 0.12
Reach1 19421 5-year 11900.00 435.88 451.89 442.15 452.05 0.000401 3.21 3742.16 450.19 0.15
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 19421 10-year 14400.00 435.88 452.43 442.72 452.65 0.000514 3.73 3912.86 473.06 0.17
Reach1 19421 25-year 16600.00 435.88 452.75 443.20 453.02 0.000634 4.19 4014.69 485.98 0.19
Reach1 19421 50-year 18200.00 435.88 452.95 443.54 453.27 0.000726 4.53 4083.99 513.94 0.21
Reach1 19421 100-year 20300.00 435.88 453.00 443.97 453.39 0.000893 5.03 4101.27 516.42 0.23
Reach1 19421 OLD 500-year 36200.00 435.88 455.08 446.71 455.74 0.001382 6.80 5740.83 798.40 0.29
Reach1 19421 NEW 500-year 55500.00 435.88 456.80 449.48 457.90 0.002061 8.84 6746.75 1255.71 0.36
Reach1 19223 2-year 8100.00 435.39 450.94 441.38 451.01 0.000247 2.13 3810.64 720.70 0.11
Reach1 19223 5-year 11900.00 435.39 451.83 442.32 451.96 0.000417 2.89 4119.81 738.81 0.14
Reach1 19223 10-year 14400.00 435.39 452.36 442.87 452.53 0.000533 3.34 4311.60 768.71 0.16
Reach1 19223 25-year 16600.00 435.39 452.65 443.32 452.87 0.000656 3.76 4423.75 778.66 0.18
Reach1 19223 50-year 18200.00 435.39 453.02 443.62 453.13 0.000255 2.38 6916.74 793.27 0.11
Reach1 19223 100-year 20300.00 435.39 453.08 444.01 453.22 0.000309 2.63 6969.05 793.79 0.12
Reach1 19223 OLD 500-year 36200.00 435.39 455.18 446.55 455.48 0.000491 3.62 8654.63 989.18 0.16
Reach1 19223 NEW 500-year 55500.00 435.39 456.99 449.08 457.51 0.000691 4.59 10147.51 1333.62 0.19
Reach1 19071 2-year 8100.00 435.86 450.92 440.71 450.98 0.000147 1.93 4230.83 910.91 0.10
Reach1 19071 5-year 11900.00 435.86 451.80 441.71 451.91 0.000252 2.62 4583.39 946.12 0.13
Reach1 19071 10-year 14400.00 435.86 452.32 442.30 452.46 0.000324 3.03 4798.49 970.81 0.15
Reach1 19071 25-year 16600.00 435.86 452.72 442.73 452.79 0.000133 1.98 8091.38 1022.51 0.10
Reach1 19071 50-year 18200.00 435.86 453.02 443.03 453.09 0.000144 2.08 8392.88 1028.46 0.10
Reach1 19071 100-year 20300.00 435.86 453.08 443.41 453.17 0.000175 2.30 8461.13 1029.79 0.11
Reach1 19071 OLD 500-year 36200.00 435.86 455.21 445.90 455.39 0.000274 3.11 10697.25 1129.54 0.14
Reach1 19071 NEW 500-year 55500.00 435.86 457.06 448.41 457.38 0.000373 3.87 12694.50 1373.16 0.17
Reach1 18826 2-year 8100.00 436.06 450.90 440.62 450.95 0.000124 1.81 4704.74 806.65 0.10
Reach1 18826 5-year 11900.00 436.06 451.79 441.51 451.85 0.000130 1.92 6557.87 1124.89 0.10
Reach1 18826 10-year 14400.00 436.06 452.32 442.03 452.38 0.000155 2.13 7189.42 1252.53 0.11
Reach1 18826 25-year 16600.00 436.06 452.67 442.47 452.75 0.000180 2.32 7634.95 1304.80 0.12
Reach1 18826 50-year 18200.00 436.06 452.97 442.75 453.05 0.000193 2.43 8002.81 1330.30 0.13
Reach1 18826 100-year 20300.00 436.06 453.02 443.13 453.12 0.000235 2.68 8072.59 1334.18 0.14
Reach1 18826 OLD 500-year 36200.00 436.06 455.13 445.60 455.31 0.000350 3.50 10759.26 1456.28 0.17
Reach1 18826 NEW 500-year 55500.00 436.06 456.98 448.18 457.27 0.000460 4.24 13125.81 1649.37 0.19
Reach1 18646 2-year 8100.00 436.03 450.88 440.45 450.92 0.000113 1.67 5363.73 1266.51 0.09
Reach1 18646 5-year 11900.00 436.03 451.75 441.36 451.82 0.000183 2.19 6047.89 1360.05 0.12
Reach1 18646 10-year 14400.00 436.03 452.26 441.89 452.35 0.000229 2.49 6469.39 1434.71 0.13
Reach1 18646 25-year 16600.00 436.03 452.60 442.33 452.71 0.000274 2.76 6777.41 1490.48 0.15
Reach1 18646 50-year 18200.00 436.03 452.89 442.63 453.00 0.000300 2.91 7045.36 1537.43 0.16
Reach1 18646 100-year 20300.00 436.03 452.92 443.02 453.07 0.000369 3.23 7080.12 1542.16 0.17
Reach1 18646 OLD 500-year 36200.00 436.03 455.12 445.51 455.24 0.000264 2.95 13452.73 1996.55 0.14
Reach1 18646 NEW 500-year 55500.00 436.03 456.98 448.82 457.17 0.000343 3.58 16756.69 2283.36 0.16
Reach1 18592 2-year 8100.00 435.26 450.88 440.19 450.92 0.000112 1.68 5336.22 1266.57 0.09
Reach1 18592 5-year 11900.00 435.26 451.74 441.10 451.81 0.000180 2.20 6079.03 1464.50 0.12
Reach1 18592 10-year 14500.00 435.26 452.25 441.66 452.33 0.000225 2.50 6566.10 1557.78 0.13
Reach1 18592 25-year 16800.00 435.26 452.59 442.12 452.69 0.000269 2.77 6923.50 1641.38 0.15
Reach1 18592 50-year 18500.00 435.26 452.87 442.44 452.99 0.000296 2.93 7233.77 1677.82 0.15
Reach1 18592 100-year 20600.00 435.26 452.90 442.82 453.05 0.000363 3.25 7270.35 1685.25 0.17
Reach1 18592 OLD 500-year 36200.00 435.26 455.07 445.29 455.22 0.000273 3.03 12848.63 2282.20 0.15
Reach1 18592 NEW 500-year 55500.00 435.26 456.92 448.51 457.14 0.000360 3.68 15955.64 2408.19 0.17
Reach1 18479 2-year 8100.00 435.77 450.87 440.16 450.90 0.000102 1.60 5877.75 1490.37 0.09
Reach1 18479 5-year 11900.00 435.77 451.73 441.05 451.79 0.000158 2.06 6949.90 1800.35 0.11
Reach1 18479 10-year 14500.00 435.77 452.23 441.60 452.30 0.000192 2.31 7679.59 1911.21 0.13
Reach1 18479 25-year 16800.00 435.77 452.57 442.06 452.66 0.000230 2.55 8189.43 1947.29 0.14
Reach1 18479 50-year 18500.00 435.77 452.86 442.39 452.95 0.000248 2.67 8617.04 1989.52 0.14
Reach1 18479 100-year 20600.00 435.77 452.89 442.78 453.00 0.000303 2.96 8662.73 1993.93 0.16
Reach1 18479 OLD 500-year 36200.00 435.77 455.05 445.24 455.18 0.000337 3.35 13041.78 2482.43 0.16
Reach1 18479 NEW 500-year 55500.00 435.77 456.90 448.52 457.09 0.000418 3.95 16283.52 2751.08 0.18
Reach1 18335 2-year 8100.00 435.38 450.86 440.21 450.89 0.000074 1.38 7610.76 1781.55 0.07
Reach1 18335 5-year 11900.00 435.38 451.73 441.09 451.76 0.000104 1.71 9076.38 2000.32 0.09
Reach1 18335 10-year 14500.00 435.38 452.23 441.65 452.27 0.000123 1.88 10003.74 2149.85 0.10
Reach1 18335 25-year 16800.00 435.38 452.57 442.14 452.62 0.000141 2.04 10646.14 2182.46 0.11
Reach1 18335 50-year 18500.00 435.38 452.86 442.49 452.91 0.000151 2.13 11183.09 2217.09 0.11
Reach1 18335 100-year 20600.00 435.38 452.89 442.88 452.95 0.000185 2.36 11240.42 2222.11 0.12
Reach1 18335 OLD 500-year 36200.00 435.38 455.04 445.32 455.13 0.000239 2.88 15414.19 2687.09 0.14
Reach1 18335 NEW 500-year 55500.00 435.38 456.88 448.18 457.02 0.000298 3.41 19027.65 3013.42 0.15
Reach1 18223 2-year 8100.00 435.81 450.86 440.55 450.88 0.000048 1.13 9014.21 1989.03 0.06
Reach1 18223 5-year 11900.00 435.81 451.72 441.41 451.75 0.000071 1.42 10299.12 2079.72 0.07
Reach1 18223 10-year 14500.00 435.81 452.23 441.89 452.26 0.000086 1.59 11068.89 2116.94 0.08
Reach1 18223 25-year 16800.00 435.81 452.57 442.30 452.60 0.000101 1.74 11593.91 2147.26 0.09
Reach1 18223 50-year 18500.00 435.81 452.87 442.59 452.89 0.000049 1.23 15574.10 2168.31 0.06
Reach1 18223 100-year 20600.00 435.81 452.90 442.92 452.93 0.000060 1.36 15638.44 2169.74 0.07
Reach1 18223 OLD 500-year 36200.00 435.81 455.04 444.99 455.11 0.000089 1.79 20326.16 2675.53 0.08
Reach1 18223 NEW 500-year 55500.00 435.81 456.89 447.25 456.99 0.000123 2.23 24549.60 3050.40 0.10
Reach1 18114 2-year 8100.00 435.70 450.86 440.03 450.87 0.000036 1.01 9772.83 1918.61 0.05
Reach1 18114 5-year 11900.00 435.70 451.72 440.92 451.74 0.000055 1.29 10983.87 1975.81 0.07
Reach1 18114 10-year 14500.00 435.70 452.22 441.47 452.25 0.000068 1.46 11701.58 2002.91 0.07
Reach1 18114 25-year 16800.00 435.70 452.56 441.99 452.59 0.000081 1.62 12188.86 2045.81 0.08
Reach1 18114 50-year 18500.00 435.70 452.86 442.35 452.89 0.000039 1.14 16664.06 2086.28 0.06
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 18114 100-year 20600.00 435.70 452.90 442.79 452.92 0.000048 1.27 16727.30 2087.51 0.06
Reach1 18114 OLD 500-year 36200.00 435.70 455.04 445.77 455.09 0.000074 1.70 21454.45 2935.50 0.08
Reach1 18114 NEW 500-year 55500.00 435.70 456.89 447.32 456.97 0.000104 2.15 25981.26 3082.65 0.09
Reach1 18045 Lat Struct
Reach1 17991 2-year 8100.00 435.50 450.85 440.53 450.87 0.000067 1.35 9252.90 2035.40 0.07
Reach1 17991 5-year 11900.00 435.50 451.70 441.49 451.73 0.000101 1.73 10609.13 2121.96 0.09
Reach1 17991 10-year 14500.00 435.50 452.20 442.06 452.24 0.000123 1.95 11410.71 2156.80 0.09
Reach1 17991 25-year 16800.00 435.50 452.53 442.55 452.58 0.000145 2.15 11951.51 2182.98 0.10
Reach1 17991 50-year 18500.00 435.50 452.82 442.89 452.87 0.000158 2.27 12425.73 2211.61 0.11
Reach1 17991 100-year 20600.00 435.50 452.84 443.30 452.91 0.000194 2.52 12462.08 2213.32 0.12
Reach1 17991 OLD 500-year 36200.00 435.50 454.96 446.89 455.07 0.000300 3.41 16163.29 2747.45 0.15
Reach1 17991 NEW 500-year 55500.00 435.50 456.78 448.69 456.94 0.000401 4.21 19744.93 3107.92 0.18
Reach1 17892 2-year 8100.00 435.76 450.82 440.66 450.85 0.000167 1.66 8904.72 2081.10 0.08
Reach1 17892 5-year 11900.00 435.76 451.67 441.69 451.71 0.000253 2.08 10332.60 2153.80 0.10
Reach1 17892 10-year 14500.00 435.76 452.16 442.34 452.22 0.000307 2.33 11173.73 2207.76 0.11
Reach1 17892 25-year 16800.00 435.76 452.52 442.83 452.57 0.000127 1.51 14763.63 2251.38 0.07
Reach1 17892 50-year 18500.00 435.76 452.81 443.18 452.86 0.000136 1.58 15399.74 2264.65 0.08
Reach1 17892 100-year 20600.00 435.76 452.83 443.60 452.89 0.000167 1.75 15441.14 2265.80 0.08
Reach1 17892 OLD 500-year 36140.67 435.76 454.93 446.65 455.04 0.000235 2.14 20123.63 2532.93 0.10
Reach1 17892 NEW 500-year 55166.73 435.76 456.73 449.83 456.91 0.000299 2.60 24420.03 2983.97 0.11
Reach1 17649 2-year 8092.61 436.16 450.75 446.90 450.80 0.000366 2.07 4791.91 1320.38 0.13
Reach1 17649 5-year 11821.80 436.16 451.57 447.50 451.63 0.000419 2.36 5818.04 1358.57 0.14
Reach1 17649 10-year 14335.23 436.16 452.05 447.87 452.13 0.000449 2.52 6417.58 1381.00 0.14
Reach1 17649 25-year 16535.93 436.16 452.42 448.15 452.51 0.000476 2.66 6880.50 1391.75 0.15
Reach1 17649 50-year 18166.26 436.16 452.70 448.36 452.80 0.000487 2.74 7236.58 1443.57 0.15
Reach1 17649 100-year 19974.46 436.16 452.70 448.55 452.82 0.000590 3.02 7232.43 1443.02 0.17
Reach1 17649 OLD 500-year 34579.20 436.16 454.75 449.75 454.95 0.000649 3.57 9832.89 1692.79 0.18
Reach1 17649 NEW 500-year 52140.63 436.16 456.49 450.86 456.79 0.000759 4.21 12049.28 2158.69 0.20
Reach1 17410 2-year 7656.44 434.03 450.63 446.69 450.69 0.000417 1.98 3856.59 904.46 0.13
Reach1 17410 5-year 10950.74 434.03 451.42 447.22 451.51 0.000527 2.33 4555.38 1033.80 0.15
Reach1 17410 10-year 13151.98 434.03 451.88 447.48 451.99 0.000585 2.54 5011.97 1111.24 0.16
Reach1 17410 25-year 15079.69 434.03 452.24 447.81 452.36 0.000635 2.71 5371.22 1135.04 0.16
Reach1 17410 50-year 16578.20 434.03 452.51 447.94 452.65 0.000665 2.83 5651.18 1157.37 0.17
Reach1 17410 100-year 17500.33 434.03 452.49 448.04 452.64 0.000751 3.00 5626.65 1155.15 0.18
Reach1 17410 OLD 500-year 30962.50 434.03 454.49 449.40 454.74 0.000940 3.83 7709.23 1283.60 0.21
Reach1 17410 NEW 500-year 46488.51 434.03 456.16 450.59 456.54 0.001132 4.64 9543.24 1721.05 0.23
Reach1 17197 2-year 6952.57 433.86 450.31 444.38 450.52 0.001189 4.46 2270.56 659.38 0.23
Reach1 17197 5-year 9764.36 433.86 451.04 448.04 451.29 0.001399 5.04 2765.10 693.81 0.25
Reach1 17197 10-year 11632.68 433.86 451.47 448.57 451.75 0.001503 5.34 3069.09 712.54 0.27
Reach1 17197 25-year 13276.37 433.86 451.80 448.98 452.10 0.001603 5.61 3300.92 718.48 0.28
Reach1 17197 50-year 14643.26 433.86 452.05 449.24 452.38 0.001684 5.82 3480.25 723.53 0.28
Reach1 17197 100-year 14610.18 433.86 452.02 449.24 452.35 0.001703 5.85 3460.67 723.04 0.28
Reach1 17197 OLD 500-year 27002.60 433.86 453.80 451.20 454.35 0.002312 7.42 4780.18 858.46 0.34
Reach1 17197 NEW 500-year 40548.07 433.86 455.29 452.31 456.07 0.002712 8.56 5939.17 1446.70 0.37
Reach1 16956 2-year 6736.15 430.89 450.35 438.81 450.41 0.000136 1.46 4386.30 914.46 0.08
Reach1 16956 5-year 9326.92 430.89 451.06 440.20 451.16 0.000190 1.81 5086.47 1006.50 0.10
Reach1 16956 10-year 11046.74 430.89 451.49 442.33 451.61 0.000224 2.01 5510.33 1040.05 0.10
Reach1 16956 25-year 12560.57 430.89 451.80 442.73 451.95 0.000254 2.18 5832.67 1059.58 0.11
Reach1 16956 50-year 13859.62 430.89 452.04 443.02 452.21 0.000282 2.33 6080.41 1071.87 0.12
Reach1 16956 100-year 13449.68 430.89 452.03 442.93 452.19 0.000267 2.26 6063.75 1071.08 0.12
Reach1 16956 OLD 500-year 25273.73 430.89 453.75 445.17 454.11 0.000505 3.41 7841.65 1125.15 0.16
Reach1 16956 NEW 500-year 37883.18 430.89 455.18 447.50 455.77 0.000723 4.35 9324.90 1450.67 0.20
Reach1 16702 2-year 6560.70 428.03 450.32 450.38 0.000114 1.25 4361.04 992.89 0.07
Reach1 16702 5-year 8891.33 428.03 451.04 451.12 0.000154 1.49 5092.02 1046.58 0.08
Reach1 16702 10-year 10434.25 428.03 451.46 451.56 0.000177 1.64 5537.89 1061.82 0.09
Reach1 16702 25-year 11790.45 428.03 451.78 451.89 0.000200 1.77 5876.36 1070.98 0.09
Reach1 16702 50-year 13001.69 428.03 452.02 452.14 0.000237 1.95 6138.32 1086.36 0.10
Reach1 16702 100-year 12170.68 428.03 452.01 452.12 0.000208 1.83 6130.63 1086.34 0.09
Reach1 16702 OLD 500-year 23236.00 428.03 453.74 453.98 0.000366 2.66 8055.78 1182.89 0.13
Reach1 16702 NEW 500-year 34643.93 428.03 455.24 455.56 0.000485 3.29 9969.24 1432.85 0.15
Reach1 16501 2-year 6469.02 428.51 450.11 450.33 0.001078 4.28 2543.71 838.79 0.21
Reach1 16501 5-year 8620.88 428.51 450.78 451.05 0.001413 4.94 3148.39 943.21 0.25
Reach1 16501 10-year 10043.75 428.51 451.18 451.48 0.001616 5.32 3538.43 1009.10 0.27
Reach1 16501 25-year 11291.15 428.51 451.48 451.81 0.001755 5.63 3847.34 1055.69 0.28
Reach1 16501 50-year 12437.12 428.51 451.69 452.05 0.001923 5.95 4071.36 1104.31 0.29
Reach1 16501 100-year 11363.50 428.51 451.75 452.04 0.001562 5.38 4139.21 1122.00 0.26
Reach1 16501 OLD 500-year 21821.26 428.51 453.37 453.85 0.002581 7.48 6026.02 1245.29 0.34
Reach1 16501 NEW 500-year 32327.19 428.51 454.84 455.40 0.002991 8.58 7956.08 1391.25 0.38
Reach1 16294 2-year 6449.22 429.34 449.87 441.19 450.11 0.001258 4.48 2497.88 863.27 0.23
Reach1 16294 5-year 8512.80 429.34 450.49 442.94 450.79 0.001568 5.12 3064.11 940.92 0.26
Reach1 16294 10-year 9876.41 429.34 450.87 444.01 451.19 0.001740 5.47 3437.09 1041.79 0.28
Reach1 16294 25-year 11067.62 429.34 451.15 444.69 451.49 0.001884 5.73 3733.81 1049.85 0.29
Reach1 16294 50-year 12172.33 429.34 451.33 445.25 451.70 0.002072 6.05 3923.28 1050.42 0.30
Reach1 16294 100-year 11047.86 429.34 451.49 444.68 451.77 0.001573 5.30 4087.71 1050.92 0.26
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 16294 OLD 500-year 21088.67 429.34 452.92 450.57 453.40 0.002888 7.49 5585.14 1056.39 0.36
Reach1 16294 NEW 500-year 31077.30 429.34 454.32 451.81 454.89 0.003493 8.55 7058.51 1085.68 0.40
Reach1 15983 2-year 6407.94 430.74 449.72 439.81 449.83 0.000573 3.19 3520.53 923.67 0.16
Reach1 15983 5-year 8281.95 430.74 450.31 441.10 450.44 0.000713 3.65 4078.21 993.15 0.18
Reach1 15983 10-year 9526.87 430.74 450.66 441.97 450.81 0.000792 3.91 4433.80 1105.65 0.19
Reach1 15983 25-year 10605.27 430.74 450.92 442.71 451.09 0.000865 4.14 4738.85 1207.12 0.20
Reach1 15983 50-year 11609.69 430.74 451.07 443.37 451.26 0.000960 4.39 4923.99 1232.49 0.22
Reach1 15983 100-year 10552.43 430.74 451.30 442.69 451.44 0.000710 3.82 5202.43 1241.90 0.19
Reach1 15983 OLD 500-year 19602.57 430.74 452.52 448.72 452.80 0.001393 5.68 6744.43 1293.81 0.26
Reach1 15983 NEW 500-year 28554.68 430.74 453.81 449.99 454.17 0.001737 6.71 8411.13 1328.05 0.30
Reach1 15671 2-year 5342.50 429.62 449.57 449.63 0.000445 2.62 4005.91 1178.08 0.14
Reach1 15671 5-year 6626.90 429.62 450.12 450.19 0.000504 2.81 4704.90 1333.33 0.15
Reach1 15671 10-year 7548.47 429.62 450.46 450.53 0.000540 2.97 5163.01 1407.89 0.16
Reach1 15671 25-year 8355.97 429.62 450.70 450.78 0.000575 3.11 5519.28 1496.31 0.16
Reach1 15671 50-year 9132.49 429.62 450.83 450.92 0.000645 3.31 5709.51 1518.88 0.17
Reach1 15671 100-year 8308.96 429.62 451.13 451.19 0.000452 2.82 6161.27 1534.99 0.14
Reach1 15671 OLD 500-year 15278.00 429.62 452.18 452.30 0.000889 4.19 7825.58 1615.89 0.21
Reach1 15671 NEW 500-year 22313.60 429.62 453.38 453.55 0.001089 4.92 9813.95 1705.60 0.23
Reach1 15359 2-year 5007.16 430.39 449.47 449.52 0.000396 2.24 4629.75 1698.84 0.13
Reach1 15359 5-year 6084.33 430.39 450.03 450.07 0.000403 2.30 5582.65 1730.02 0.13
Reach1 15359 10-year 6896.27 430.39 450.36 450.41 0.000415 2.39 6166.95 1796.26 0.14
Reach1 15359 25-year 7612.03 430.39 450.61 450.65 0.000436 2.48 6603.07 1799.49 0.14
Reach1 15359 50-year 8299.42 430.39 450.72 450.77 0.000482 2.63 6811.60 1799.68 0.15
Reach1 15359 100-year 7705.99 430.39 451.05 451.09 0.000340 2.25 7405.67 1800.23 0.12
Reach1 15359 OLD 500-year 13834.26 430.39 452.04 452.11 0.000636 3.24 9184.52 1802.14 0.17
Reach1 15359 NEW 500-year 20230.16 430.39 453.22 453.32 0.000778 3.75 11323.97 1807.43 0.19
Reach1 15238 2-year 5007.16 432.75 449.45 441.23 449.48 0.000435 2.01 4489.41 1826.93 0.13
Reach1 15238 5-year 6074.58 432.75 450.01 442.38 450.04 0.000442 2.03 5478.38 1919.94 0.13
Reach1 15238 10-year 6877.01 432.75 450.34 443.07 450.37 0.000461 2.07 6086.80 1963.52 0.13
Reach1 15238 25-year 7583.26 432.75 450.58 443.62 450.62 0.000484 2.08 6539.19 1997.46 0.13
Reach1 15238 50-year 8257.82 432.75 450.70 444.09 450.73 0.000530 2.19 6753.17 1997.50 0.14
Reach1 15238 100-year 7705.39 432.75 451.04 443.72 451.06 0.000366 1.87 7385.40 1997.60 0.12
Reach1 15238 OLD 500-year 13714.17 432.75 452.01 447.59 452.06 0.000640 2.64 9220.06 1998.32 0.16
Reach1 15238 NEW 500-year 20017.21 432.75 453.20 448.57 453.26 0.000739 3.08 11445.80 2044.00 0.17
Reach1 15050 2-year 5001.03 432.13 449.39 443.03 449.42 0.000403 2.01 3927.04 1457.99 0.13
Reach1 15050 5-year 6016.48 432.13 449.95 443.82 449.98 0.000413 2.00 4795.73 1775.76 0.13
Reach1 15050 10-year 6785.92 432.13 450.28 444.32 450.32 0.000423 2.01 5380.61 1914.83 0.13
Reach1 15050 25-year 7461.20 432.13 450.52 444.99 450.56 0.000440 2.02 5826.38 1967.23 0.13
Reach1 15050 50-year 8094.98 432.13 450.63 446.31 450.67 0.000481 2.12 6032.13 1988.52 0.14
Reach1 15050 100-year 7695.37 432.13 450.99 444.99 451.02 0.000343 1.83 6715.96 2014.81 0.12
Reach1 15050 OLD 500-year 13316.10 432.13 451.94 447.56 451.99 0.000575 2.51 8544.73 2021.79 0.16
Reach1 15050 NEW 500-year 19348.63 432.13 453.12 448.30 453.17 0.000661 2.82 10822.39 2068.72 0.17
Reach1 14973 2-year 4990.89 433.42 449.38 442.65 449.40 0.000254 1.44 6086.89 1714.69 0.10
Reach1 14973 5-year 5966.32 433.42 449.94 443.52 449.96 0.000272 1.50 7050.75 1899.71 0.10
Reach1 14973 10-year 6715.20 433.42 450.27 443.82 450.29 0.000278 1.52 7672.91 2007.26 0.11
Reach1 14973 25-year 7372.20 433.42 450.51 444.63 450.53 0.000293 1.54 8144.50 2073.82 0.11
Reach1 14973 50-year 7982.46 433.42 450.62 445.47 450.64 0.000320 1.62 8359.75 2075.48 0.11
Reach1 14973 100-year 7682.93 433.42 450.98 444.62 451.00 0.000235 1.40 9077.57 2086.86 0.10
Reach1 14973 OLD 500-year 13073.97 433.42 451.93 446.91 451.95 0.000384 1.96 10976.96 2101.66 0.13
Reach1 14973 NEW 500-year 18961.78 433.42 453.10 447.46 453.14 0.000442 2.32 13354.71 2124.79 0.14
Reach1 14819 2-year 4988.65 433.00 449.35 441.80 449.37 0.000239 1.50 5442.69 1568.93 0.10
Reach1 14819 5-year 5923.29 433.00 449.91 442.56 449.92 0.000245 1.49 6342.23 1871.53 0.10
Reach1 14819 10-year 6639.94 433.00 450.24 443.04 450.26 0.000248 1.54 6936.82 1980.21 0.10
Reach1 14819 25-year 7265.42 433.00 450.48 443.46 450.50 0.000253 1.58 7379.07 2004.33 0.10
Reach1 14819 50-year 7830.07 433.00 450.58 443.76 450.60 0.000275 1.67 7576.59 2034.92 0.11
Reach1 14819 100-year 7680.75 433.00 450.95 443.72 450.97 0.000211 1.51 8289.90 2095.44 0.09
Reach1 14819 OLD 500-year 12669.17 433.00 451.88 446.75 451.91 0.000337 2.05 10121.47 2113.94 0.12
Reach1 14819 NEW 500-year 18259.77 433.00 453.04 447.27 453.08 0.000393 2.41 12431.63 2119.73 0.13
Reach1 14706 2-year 4988.65 432.06 449.33 441.34 449.35 0.000206 1.43 5479.19 1456.99 0.09
Reach1 14706 5-year 5912.30 432.06 449.89 442.12 449.90 0.000215 1.45 6332.28 1881.57 0.09
Reach1 14706 10-year 6613.40 432.06 450.22 442.62 450.24 0.000225 1.49 6942.75 1974.80 0.10
Reach1 14706 25-year 7222.71 432.06 450.46 442.97 450.47 0.000230 1.53 7391.53 1994.73 0.10
Reach1 14706 50-year 7762.12 432.06 450.56 443.31 450.58 0.000249 1.60 7587.44 2004.91 0.10
Reach1 14706 100-year 7680.75 432.06 450.93 443.28 450.95 0.000195 1.45 8308.07 2047.90 0.09
Reach1 14706 OLD 500-year 12463.25 432.06 451.85 446.47 451.88 0.000306 1.95 10098.50 2055.65 0.12
Reach1 14706 NEW 500-year 17887.24 432.06 453.01 446.91 453.05 0.000359 2.29 12377.10 2075.18 0.13
Reach1 14425 2-year 4988.65 429.03 449.30 439.35 449.31 0.000079 1.05 8007.84 1980.55 0.06
Reach1 14425 5-year 5846.79 429.03 449.85 439.97 449.86 0.000081 1.08 9087.69 2105.09 0.06
Reach1 14425 10-year 6469.99 429.03 450.18 440.39 450.19 0.000082 1.11 9745.92 2111.27 0.06
Reach1 14425 25-year 7001.15 429.03 450.42 440.73 450.43 0.000084 1.14 10220.00 2115.21 0.06
Reach1 14425 50-year 7419.22 429.03 450.52 441.03 450.53 0.000089 1.18 10421.56 2117.09 0.06
Reach1 14425 100-year 7680.75 429.03 450.90 441.22 450.91 0.000078 1.14 11181.00 2124.15 0.06
Reach1 14425 OLD 500-year 11481.19 429.03 451.80 444.45 451.82 0.000113 1.44 12999.41 2135.68 0.07
Reach1 14425 NEW 500-year 16142.49 429.03 452.96 445.57 452.98 0.000138 1.69 15333.83 2146.91 0.08
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 14137 2-year 4988.65 429.68 449.27 438.48 449.28 0.000067 1.07 9024.37 2249.19 0.06
Reach1 14137 5-year 5844.16 429.68 449.83 439.09 449.83 0.000066 1.10 10294.00 2312.19 0.06
Reach1 14137 10-year 6451.54 429.68 450.16 439.48 450.16 0.000066 1.12 11061.10 2331.96 0.06
Reach1 14137 25-year 6954.90 429.68 450.39 439.82 450.40 0.000067 1.14 11614.65 2340.53 0.06
Reach1 14137 50-year 7304.85 429.68 450.49 440.03 450.50 0.000070 1.18 11847.68 2344.09 0.06
Reach1 14137 100-year 7680.75 429.68 450.88 440.27 450.88 0.000063 1.14 12745.63 2364.29 0.06
Reach1 14137 OLD 500-year 10828.33 429.68 451.77 443.97 451.78 0.000081 1.35 14873.74 2448.43 0.06
Reach1 14137 NEW 500-year 14740.43 429.68 452.92 444.93 452.93 0.000091 1.51 17674.29 2521.00 0.07
Reach1 13942 2-year 4988.65 429.97 449.26 438.58 449.27 0.000088 1.16 9362.65 2303.15 0.06
Reach1 13942 5-year 5844.16 429.97 449.82 439.25 449.83 0.000088 1.19 10648.43 2332.23 0.06
Reach1 13942 10-year 6451.54 429.97 450.15 439.69 450.16 0.000090 1.22 11420.34 2340.10 0.06
Reach1 13942 25-year 6954.90 429.97 450.39 440.03 450.39 0.000092 1.25 11974.83 2347.77 0.07
Reach1 13942 50-year 7302.14 429.97 450.48 440.26 450.49 0.000097 1.29 12207.38 2352.68 0.07
Reach1 13942 100-year 7680.75 429.97 450.87 440.53 450.88 0.000089 1.25 13106.42 2371.68 0.06
Reach1 13942 OLD 500-year 10769.20 429.97 451.76 444.30 451.77 0.000116 1.49 15222.31 2427.18 0.07
Reach1 13942 NEW 500-year 14592.83 429.97 452.91 445.24 452.92 0.000132 1.69 17976.97 2491.31 0.08
Reach1 13768 2-year 4988.65 432.44 449.26 440.80 449.26 0.000080 0.83 9758.82 2435.13 0.06
Reach1 13768 5-year 5842.67 432.44 449.81 441.61 449.82 0.000077 0.87 11119.12 2489.76 0.06
Reach1 13768 10-year 6443.16 432.44 450.14 442.11 450.15 0.000077 0.89 11938.62 2510.41 0.06
Reach1 13768 25-year 6935.15 432.44 450.38 443.86 450.38 0.000078 0.92 12529.23 2522.09 0.06
Reach1 13768 50-year 7258.06 432.44 450.48 443.94 450.48 0.000081 0.94 12776.95 2526.82 0.06
Reach1 13768 100-year 7680.75 432.44 450.86 444.03 450.87 0.000074 0.93 13742.74 2550.72 0.06
Reach1 13768 OLD 500-year 10584.30 432.44 451.75 444.72 451.76 0.000090 1.09 16014.42 2583.05 0.06
Reach1 13768 NEW 500-year 14226.87 432.44 452.90 445.16 452.91 0.000100 1.25 18974.56 2607.91 0.07
Reach1 13646 2-year 4988.65 433.69 449.25 449.25 0.000076 0.82 10277.73 2508.95 0.06
Reach1 13646 5-year 5836.61 433.69 449.80 449.81 0.000073 0.85 11699.28 2618.80 0.06
Reach1 13646 10-year 6415.83 433.69 450.13 450.14 0.000072 0.87 12568.72 2631.51 0.06
Reach1 13646 25-year 6883.66 433.69 450.37 450.37 0.000073 0.89 13191.40 2632.00 0.06
Reach1 13646 50-year 7165.01 433.69 450.47 450.47 0.000074 0.91 13451.17 2632.23 0.06
Reach1 13646 100-year 7680.75 433.69 450.85 450.86 0.000069 0.90 14462.23 2633.24 0.06
Reach1 13646 OLD 500-year 10273.04 433.69 451.74 451.75 0.000079 1.03 16808.98 2643.89 0.06
Reach1 13646 NEW 500-year 13647.37 433.69 452.89 452.90 0.000084 1.15 19856.99 2689.30 0.06
Reach1 13307 2-year 4988.65 430.93 449.24 440.77 449.24 0.000021 0.50 12732.32 2502.52 0.03
Reach1 13307 5-year 5836.31 430.93 449.80 440.99 449.80 0.000022 0.54 14154.68 2641.37 0.03
Reach1 13307 10-year 6404.62 430.93 450.13 441.13 450.13 0.000023 0.56 15025.13 2663.16 0.03
Reach1 13307 25-year 6847.59 430.93 450.36 441.24 450.37 0.000023 0.58 15648.34 2663.50 0.03
Reach1 13307 50-year 7076.42 430.93 450.46 441.29 450.46 0.000024 0.59 15908.05 2663.64 0.03
Reach1 13307 100-year 7680.75 430.93 450.85 441.42 450.85 0.000024 0.60 16920.66 2664.23 0.03
Reach1 13307 OLD 500-year 9882.69 430.93 451.74 441.90 451.74 0.000028 0.69 19269.19 2675.23 0.04
Reach1 13307 NEW 500-year 12867.72 430.93 452.88 442.52 452.89 0.000032 0.78 22330.36 2790.37 0.04
Reach1 13144 2-year 4988.65 431.75 449.24 440.38 449.24 0.000022 0.54 12849.25 2422.59 0.03
Reach1 13144 5-year 5831.32 431.75 449.79 440.60 449.80 0.000025 0.61 14239.16 2585.28 0.03
Reach1 13144 10-year 6386.37 431.75 450.12 440.73 450.13 0.000026 0.63 15090.36 2608.64 0.03
Reach1 13144 25-year 6810.57 431.75 450.36 440.82 450.36 0.000027 0.65 15700.52 2609.60 0.04
Reach1 13144 50-year 7003.54 431.75 450.46 440.86 450.46 0.000027 0.65 15954.83 2610.09 0.04
Reach1 13144 100-year 7680.75 431.75 450.84 440.99 450.85 0.000028 0.68 16947.05 2614.94 0.04
Reach1 13144 OLD 500-year 9612.74 431.75 451.73 441.34 451.74 0.000030 0.75 19252.25 2624.09 0.04
Reach1 13144 NEW 500-year 12349.69 431.75 452.88 441.90 452.88 0.000033 0.83 22271.56 2689.16 0.04
Reach1 12970 2-year 4988.65 432.47 449.24 440.07 449.24 0.000018 0.49 13158.68 2368.71 0.03
Reach1 12970 5-year 5827.04 432.47 449.79 440.26 449.79 0.000019 0.52 14519.99 2509.58 0.03
Reach1 12970 10-year 6373.16 432.47 450.12 440.38 450.12 0.000020 0.54 15339.64 2511.03 0.03
Reach1 12970 25-year 6787.82 432.47 450.36 440.46 450.36 0.000020 0.56 15926.58 2512.07 0.03
Reach1 12970 50-year 6964.88 432.47 450.46 440.49 450.46 0.000021 0.57 16171.31 2512.51 0.03
Reach1 12970 100-year 7680.75 432.47 450.84 440.62 450.84 0.000021 0.59 17125.59 2514.53 0.03
Reach1 12970 OLD 500-year 9492.17 432.47 451.73 440.95 451.73 0.000023 0.65 19346.63 2544.67 0.03
Reach1 12970 NEW 500-year 12129.69 432.47 452.87 441.38 452.88 0.000026 0.73 22280.97 2624.77 0.04
Reach1 12654 2-year 4988.65 429.28 449.23 439.92 449.23 0.000017 0.59 12250.10 2092.12 0.03
Reach1 12654 5-year 5827.04 429.28 449.78 440.12 449.79 0.000019 0.63 13438.21 2218.65 0.03
Reach1 12654 10-year 6373.16 429.28 450.11 440.25 450.12 0.000020 0.65 14158.66 2219.48 0.03
Reach1 12654 25-year 6787.82 429.28 450.35 440.33 450.35 0.000020 0.67 14674.45 2220.08 0.03
Reach1 12654 50-year 6964.88 429.28 450.45 440.37 450.45 0.000020 0.68 14889.45 2220.33 0.03
Reach1 12654 100-year 7680.75 429.28 450.83 440.51 450.84 0.000021 0.71 15727.89 2221.31 0.03
Reach1 12654 OLD 500-year 9492.17 429.28 451.72 440.85 451.72 0.000024 0.77 17675.95 2243.48 0.03
Reach1 12654 NEW 500-year 12129.69 429.28 452.86 441.28 452.87 0.000027 0.86 20229.22 2294.27 0.04
Reach1 12551 2-year 4988.65 430.62 449.23 439.72 449.23 0.000018 0.55 12814.35 2139.70 0.03
Reach1 12551 5-year 5827.04 430.62 449.78 439.93 449.78 0.000020 0.60 13998.38 2178.77 0.03
Reach1 12551 10-year 6373.16 430.62 450.11 440.05 450.11 0.000021 0.62 14704.21 2179.35 0.03
Reach1 12551 25-year 6787.82 430.62 450.35 440.14 450.35 0.000021 0.64 15209.47 2179.77 0.03
Reach1 12551 50-year 6964.88 430.62 450.45 440.18 450.45 0.000022 0.65 15420.09 2179.94 0.03
Reach1 12551 100-year 7680.75 430.62 450.83 440.33 450.83 0.000023 0.68 16241.29 2180.68 0.03
Reach1 12551 OLD 500-year 9492.17 430.62 451.72 440.67 451.72 0.000025 0.74 18144.43 2182.91 0.04
Reach1 12551 NEW 500-year 12129.69 430.62 452.86 441.09 452.87 0.000028 0.83 20637.33 2266.58 0.04
Reach1 12046 2-year 4988.65 429.62 449.19 449.21 0.000121 1.57 7329.99 1481.60 0.08
Reach1 12046 5-year 5827.04 429.62 449.75 449.77 0.000127 1.65 8147.31 1483.78 0.08
Reach1 12046 10-year 6373.16 429.62 450.07 450.10 0.000131 1.71 8634.88 1485.10 0.08
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 12046 25-year 6787.82 429.62 450.31 450.33 0.000135 1.75 8983.95 1486.25 0.08
Reach1 12046 50-year 6964.88 429.62 450.41 450.43 0.000136 1.77 9129.52 1486.73 0.08
Reach1 12046 100-year 7680.75 429.62 450.79 450.81 0.000141 1.83 9697.52 1489.66 0.09
Reach1 12046 OLD 500-year 9492.17 429.62 451.67 451.70 0.000152 1.98 11025.75 1514.81 0.09
Reach1 12046 NEW 500-year 12129.69 429.62 452.81 452.84 0.000166 2.17 12780.44 1554.78 0.09
Reach1 11821 2-year 4988.65 429.67 449.11 449.16 0.000277 2.38 5232.12 1287.84 0.12
Reach1 11821 5-year 5827.04 429.67 449.66 449.71 0.000286 2.49 5939.60 1289.18 0.12
Reach1 11821 10-year 6373.16 429.67 449.99 450.04 0.000292 2.55 6361.17 1290.00 0.12
Reach1 11821 25-year 6787.82 429.67 450.22 450.27 0.000296 2.60 6662.68 1290.60 0.12
Reach1 11821 50-year 6964.88 429.67 450.32 450.37 0.000298 2.62 6788.42 1290.85 0.12
Reach1 11821 100-year 7680.75 429.67 450.70 450.75 0.000306 2.70 7278.73 1291.83 0.12
Reach1 11821 OLD 500-year 9492.17 429.67 451.58 451.64 0.000323 2.88 8419.06 1308.44 0.13
Reach1 11821 NEW 500-year 12129.69 429.67 452.71 452.77 0.000342 3.11 9953.04 1373.51 0.13
Reach1 11650 2-year 4988.65 429.58 449.03 449.10 0.000363 2.73 4978.49 1163.94 0.13
Reach1 11650 5-year 5827.04 429.58 449.58 449.65 0.000378 2.86 5614.39 1165.53 0.13
Reach1 11650 10-year 6373.16 429.58 449.90 449.98 0.000388 2.94 5993.20 1166.43 0.14
Reach1 11650 25-year 6787.82 429.58 450.13 450.21 0.000396 3.00 6263.99 1167.07 0.14
Reach1 11650 50-year 6964.88 429.58 450.23 450.31 0.000399 3.02 6376.94 1167.34 0.14
Reach1 11650 100-year 7680.75 429.58 450.61 450.69 0.000411 3.12 6817.46 1168.43 0.14
Reach1 11650 OLD 500-year 9492.17 429.58 451.48 451.57 0.000437 3.35 7845.29 1226.79 0.15
Reach1 11650 NEW 500-year 12129.69 429.58 452.61 452.70 0.000464 3.61 9278.93 1278.40 0.15
Reach1 11479 2-year 4988.65 428.39 448.93 449.03 0.000456 2.99 4171.01 1079.64 0.15
Reach1 11479 5-year 5827.04 428.39 449.48 449.57 0.000470 3.12 4758.08 1081.15 0.15
Reach1 11479 10-year 6373.16 428.39 449.80 449.90 0.000479 3.20 5107.52 1082.13 0.15
Reach1 11479 25-year 6787.82 428.39 450.03 450.13 0.000487 3.26 5357.13 1082.86 0.15
Reach1 11479 50-year 6964.88 428.39 450.13 450.22 0.000490 3.29 5461.30 1083.19 0.15
Reach1 11479 100-year 7680.75 428.39 450.50 450.60 0.000501 3.38 5867.88 1101.78 0.16
Reach1 11479 OLD 500-year 9492.17 428.39 451.37 451.47 0.000527 3.61 6835.37 1128.40 0.16
Reach1 11479 NEW 500-year 12129.69 428.39 452.49 452.60 0.000552 3.87 8159.52 1198.44 0.17
Reach1 11175 2-year 4988.65 426.46 448.86 448.93 0.000239 2.49 4474.86 1051.21 0.11
Reach1 11175 5-year 5827.04 426.46 449.40 449.47 0.000257 2.64 5042.14 1054.06 0.12
Reach1 11175 10-year 6373.16 426.46 449.72 449.80 0.000267 2.73 5379.94 1054.94 0.12
Reach1 11175 25-year 6787.82 426.46 449.95 450.03 0.000275 2.79 5621.18 1055.56 0.12
Reach1 11175 50-year 6964.88 426.46 450.05 450.12 0.000279 2.82 5721.89 1055.84 0.12
Reach1 11175 100-year 7680.75 426.46 450.42 450.50 0.000291 2.93 6114.52 1056.92 0.12
Reach1 11175 OLD 500-year 9492.17 426.46 451.28 451.37 0.000320 3.17 7036.58 1115.22 0.13
Reach1 11175 NEW 500-year 12129.69 426.46 452.39 452.49 0.000349 3.45 8280.41 1115.22 0.14
Reach1 10877 2-year 4988.65 433.94 448.77 448.85 0.000518 2.82 3963.08 1207.00 0.15
Reach1 10877 5-year 5827.04 433.94 449.31 449.40 0.000515 2.91 4621.13 1212.92 0.16
Reach1 10877 10-year 6373.16 433.94 449.63 449.72 0.000515 2.97 5013.14 1216.12 0.16
Reach1 10877 25-year 6787.82 433.94 449.86 449.95 0.000517 3.02 5293.18 1218.20 0.16
Reach1 10877 50-year 6964.88 433.94 449.96 450.05 0.000517 3.03 5410.14 1219.00 0.16
Reach1 10877 100-year 7680.75 433.94 450.33 450.42 0.000520 3.11 5866.55 1221.96 0.16
Reach1 10877 OLD 500-year 9492.17 433.94 451.20 451.29 0.000527 3.28 6935.06 1271.32 0.16
Reach1 10877 NEW 500-year 12129.69 433.94 452.32 452.42 0.000533 3.49 8376.05 1290.67 0.16
Reach1 10581 2-year 4988.65 428.86 448.66 448.71 0.000308 2.49 4800.96 1226.93 0.12
Reach1 10581 5-year 5827.04 428.86 449.20 449.26 0.000311 2.56 5467.65 1229.16 0.12
Reach1 10581 10-year 6373.16 428.86 449.52 449.58 0.000314 2.62 5863.44 1231.46 0.12
Reach1 10581 25-year 6787.82 428.86 449.75 449.81 0.000317 2.66 6146.65 1245.98 0.12
Reach1 10581 50-year 6964.88 428.86 449.85 449.90 0.000318 2.67 6266.10 1252.53 0.12
Reach1 10581 100-year 7680.75 428.86 450.22 450.28 0.000323 2.74 6738.26 1275.76 0.13
Reach1 10581 OLD 500-year 9492.17 428.86 451.08 451.14 0.000333 2.89 7844.88 1301.24 0.13
Reach1 10581 NEW 500-year 12129.69 428.86 452.20 452.26 0.000344 3.07 9313.69 1315.47 0.13
Reach1 10479 2-year 4988.65 429.26 448.64 448.68 0.000259 2.20 5161.63 1268.23 0.11
Reach1 10479 5-year 5827.04 429.26 449.18 449.22 0.000260 2.27 5850.87 1272.62 0.11
Reach1 10479 10-year 6373.16 429.26 449.50 449.54 0.000262 2.32 6260.26 1275.04 0.11
Reach1 10479 25-year 6787.82 429.26 449.73 449.77 0.000264 2.35 6552.20 1277.06 0.11
Reach1 10479 50-year 6964.88 429.26 449.83 449.87 0.000265 2.37 6674.11 1278.06 0.11
Reach1 10479 100-year 7680.75 429.26 450.20 450.24 0.000269 2.43 7150.52 1283.17 0.12
Reach1 10479 OLD 500-year 9492.17 429.26 451.06 451.11 0.000277 2.57 8267.93 1320.31 0.12
Reach1 10479 NEW 500-year 12129.69 429.26 452.18 452.23 0.000286 2.74 9762.53 1342.32 0.12
Reach1 10194 2-year 4988.65 428.61 448.59 448.63 0.000152 1.98 5705.67 1115.50 0.09
Reach1 10194 5-year 5827.04 428.61 449.13 449.17 0.000167 2.12 6312.98 1140.27 0.09
Reach1 10194 10-year 6373.16 428.61 449.45 449.49 0.000176 2.21 6677.97 1149.43 0.09
Reach1 10194 25-year 6787.82 428.61 449.67 449.72 0.000183 2.27 6939.52 1156.79 0.10
Reach1 10194 50-year 6964.88 428.61 449.77 449.81 0.000186 2.29 7049.12 1159.61 0.10
Reach1 10194 100-year 7680.75 428.61 450.14 450.18 0.000199 2.41 7480.03 1184.72 0.10
Reach1 10194 OLD 500-year 9492.17 428.61 450.99 451.04 0.000221 2.62 8499.04 1203.42 0.11
Reach1 10194 NEW 500-year 12129.69 428.61 452.10 452.16 0.000245 2.86 9841.10 1209.65 0.11
Reach1 9896 2-year 4988.65 427.72 448.52 448.57 0.000234 2.36 4754.92 1059.03 0.11
Reach1 9896 5-year 5827.04 427.72 449.05 449.11 0.000247 2.48 5323.00 1065.97 0.11
Reach1 9896 10-year 6373.16 427.72 449.37 449.42 0.000255 2.56 5666.07 1100.09 0.11
Reach1 9896 25-year 6787.82 427.72 449.59 449.65 0.000263 2.61 5920.31 1164.07 0.11
Reach1 9896 50-year 6964.88 427.72 449.69 449.74 0.000265 2.64 6030.23 1175.05 0.11
Reach1 9896 100-year 7680.75 427.72 450.05 450.11 0.000277 2.74 6463.38 1196.86 0.12
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 9896 OLD 500-year 9492.17 427.72 450.90 450.97 0.000298 2.93 7494.66 1219.45 0.12
Reach1 9896 NEW 500-year 12129.69 427.72 452.01 452.08 0.000314 3.13 8843.58 1219.45 0.13
Reach1 9579 2-year 4988.65 426.32 448.43 448.48 0.000294 2.48 5981.58 1372.42 0.12
Reach1 9579 5-year 5827.04 426.32 448.96 449.01 0.000309 2.61 6714.45 1394.57 0.12
Reach1 9579 10-year 6373.16 426.32 449.27 449.33 0.000318 2.68 7156.14 1435.12 0.12
Reach1 9579 25-year 6787.82 426.32 449.49 449.55 0.000325 2.74 7479.75 1466.97 0.12
Reach1 9579 50-year 6964.88 426.32 449.58 449.65 0.000328 2.76 7616.78 1476.05 0.13
Reach1 9579 100-year 7680.75 426.32 449.95 450.01 0.000339 2.85 8158.30 1509.75 0.13
Reach1 9579 OLD 500-year 9492.17 426.32 450.79 450.86 0.000362 3.05 9430.82 1509.75 0.13
Reach1 9579 NEW 500-year 12129.69 426.32 451.89 451.96 0.000386 3.29 11089.94 1509.75 0.14
Reach1 9415 2-year 4988.65 426.96 448.40 448.45 0.000263 2.35 6024.85 1387.76 0.11
Reach1 9415 5-year 5827.04 426.96 448.93 448.98 0.000274 2.46 6762.37 1399.76 0.11
Reach1 9415 10-year 6373.16 426.96 449.24 449.30 0.000282 2.53 7203.23 1417.82 0.12
Reach1 9415 25-year 6787.82 426.96 449.46 449.52 0.000290 2.59 7527.86 1473.76 0.12
Reach1 9415 50-year 6964.88 426.96 449.56 449.61 0.000292 2.61 7665.08 1473.76 0.12
Reach1 9415 100-year 7680.75 426.96 449.92 449.98 0.000301 2.69 8197.41 1473.76 0.12
Reach1 9415 OLD 500-year 9492.17 426.96 450.76 450.82 0.000320 2.88 9438.83 1473.76 0.13
Reach1 9415 NEW 500-year 12129.69 426.96 451.86 451.92 0.000341 3.10 11057.27 1473.76 0.13
Reach1 9327 2-year 4988.65 424.85 448.36 448.43 0.000240 2.40 5460.98 1270.59 0.11
Reach1 9327 5-year 5827.04 424.85 448.89 448.96 0.000264 2.57 6129.86 1283.76 0.11
Reach1 9327 10-year 6373.16 424.85 449.20 449.27 0.000278 2.68 6529.67 1298.98 0.12
Reach1 9327 25-year 6787.82 424.85 449.42 449.49 0.000290 2.76 6816.75 1310.23 0.12
Reach1 9327 50-year 6964.88 424.85 449.51 449.59 0.000294 2.79 6937.37 1311.35 0.12
Reach1 9327 100-year 7680.75 424.85 449.87 449.95 0.000312 2.91 7425.97 1405.25 0.12
Reach1 9327 OLD 500-year 9492.17 424.85 450.70 450.79 0.000349 3.18 8599.56 1407.20 0.13
Reach1 9327 NEW 500-year 12129.69 424.85 451.79 451.89 0.000390 3.49 10132.75 1407.20 0.14
Reach1 9055 2-year 4988.65 428.21 448.31 448.35 0.000283 2.25 6892.37 1563.19 0.11
Reach1 9055 5-year 5827.04 428.21 448.83 448.88 0.000294 2.36 7710.58 1568.16 0.12
Reach1 9055 10-year 6373.16 428.21 449.14 449.19 0.000302 2.43 8195.29 1571.42 0.12
Reach1 9055 25-year 6787.82 428.21 449.36 449.41 0.000308 2.48 8539.64 1574.08 0.12
Reach1 9055 50-year 6964.88 428.21 449.45 449.50 0.000311 2.51 8683.80 1575.30 0.12
Reach1 9055 100-year 7680.75 428.21 449.81 449.85 0.000321 2.59 9244.98 1581.60 0.12
Reach1 9055 OLD 500-year 9492.17 428.21 450.64 450.69 0.000343 2.79 10558.03 1581.60 0.13
Reach1 9055 NEW 500-year 12129.69 428.21 451.72 451.78 0.000368 3.03 12274.00 1581.60 0.14
Reach1 8898 2-year 4988.65 425.20 448.29 448.32 0.000154 1.91 7832.90 1607.18 0.09
Reach1 8898 5-year 5827.04 425.20 448.81 448.85 0.000167 2.03 8671.13 1613.47 0.09
Reach1 8898 10-year 6373.16 425.20 449.12 449.15 0.000175 2.11 9168.32 1622.36 0.09
Reach1 8898 25-year 6787.82 425.20 449.34 449.37 0.000181 2.16 9524.13 1636.47 0.10
Reach1 8898 50-year 6964.88 425.20 449.43 449.47 0.000184 2.19 9673.40 1636.47 0.10
Reach1 8898 100-year 7680.75 425.20 449.78 449.82 0.000194 2.28 10252.52 1636.47 0.10
Reach1 8898 OLD 500-year 9492.17 425.20 450.61 450.65 0.000215 2.48 11606.17 1636.47 0.11
Reach1 8898 NEW 500-year 12129.69 425.20 451.69 451.74 0.000241 2.74 13376.18 1636.47 0.11
Reach1 8756 2-year 4988.65 427.96 448.27 448.30 0.000204 1.97 7975.69 1701.36 0.10
Reach1 8756 5-year 5827.04 427.96 448.79 448.83 0.000213 2.06 8864.16 1713.64 0.10
Reach1 8756 10-year 6373.16 427.96 449.10 449.13 0.000220 2.13 9398.31 1750.93 0.10
Reach1 8756 25-year 6787.82 427.96 449.32 449.35 0.000224 2.17 9779.94 1750.93 0.10
Reach1 8756 50-year 6964.88 427.96 449.41 449.44 0.000226 2.19 9939.66 1750.93 0.10
Reach1 8756 100-year 7680.75 427.96 449.76 449.80 0.000234 2.27 10559.07 1750.93 0.11
Reach1 8756 OLD 500-year 9492.17 427.96 450.59 450.63 0.000251 2.44 12006.97 1750.93 0.11
Reach1 8756 NEW 500-year 12129.69 427.96 451.67 451.71 0.000269 2.65 13900.25 1750.93 0.12
Reach1 8588 2-year 4988.65 427.28 448.23 448.27 0.000267 2.12 6487.68 1390.89 0.11
Reach1 8588 5-year 5827.04 427.28 448.75 448.79 0.000277 2.22 7211.48 1397.07 0.11
Reach1 8588 10-year 6373.16 427.28 449.06 449.10 0.000285 2.29 7640.18 1401.02 0.11
Reach1 8588 25-year 6787.82 427.28 449.28 449.32 0.000290 2.34 7944.52 1404.12 0.12
Reach1 8588 50-year 6964.88 427.28 449.37 449.41 0.000293 2.36 8072.10 1405.42 0.12
Reach1 8588 100-year 7680.75 427.28 449.72 449.76 0.000303 2.44 8568.29 1413.25 0.12
Reach1 8588 OLD 500-year 9492.17 427.28 450.54 450.59 0.000327 2.64 9755.75 1476.72 0.12
Reach1 8588 NEW 500-year 12129.69 427.28 451.62 451.67 0.000341 2.83 11349.15 1476.72 0.13
Reach1 8325 2-year 4988.65 430.56 448.14 448.18 0.000555 2.52 5458.39 1416.62 0.15
Reach1 8325 5-year 5827.04 430.56 448.66 448.70 0.000513 2.51 6200.52 1423.05 0.14
Reach1 8325 10-year 6373.16 430.56 448.97 449.00 0.000498 2.53 6638.65 1428.30 0.14
Reach1 8325 25-year 6787.82 430.56 449.18 449.22 0.000491 2.55 6949.15 1434.86 0.14
Reach1 8325 50-year 6964.88 430.56 449.27 449.31 0.000489 2.56 7079.61 1438.07 0.14
Reach1 8325 100-year 7680.75 430.56 449.63 449.66 0.000480 2.59 7587.56 1446.17 0.14
Reach1 8325 OLD 500-year 9492.17 430.56 450.45 450.49 0.000465 2.68 8786.13 1469.69 0.14
Reach1 8325 NEW 500-year 12129.69 430.56 451.53 451.57 0.000456 2.82 10385.92 1515.71 0.14
Reach1 8225 2-year 4988.65 431.00 448.05 448.10 0.000740 2.44 5131.75 1472.11 0.17
Reach1 8225 5-year 5827.04 431.00 448.58 448.63 0.000678 2.46 5913.67 1487.85 0.16
Reach1 8225 10-year 6373.16 431.00 448.89 448.94 0.000653 2.49 6376.93 1500.07 0.16
Reach1 8225 25-year 6787.82 431.00 449.11 449.16 0.000641 2.52 6704.57 1503.71 0.16
Reach1 8225 50-year 6964.88 431.00 449.20 449.25 0.000636 2.53 6841.84 1505.02 0.16
Reach1 8225 100-year 7680.75 431.00 449.56 449.60 0.000619 2.57 7374.97 1510.09 0.16
Reach1 8225 OLD 500-year 9492.17 431.00 450.38 450.43 0.000591 2.68 8624.67 1521.49 0.16
Reach1 8225 NEW 500-year 12129.69 431.00 451.46 451.51 0.000569 2.84 10308.66 1616.88 0.16
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 8044 2-year 4988.65 431.85 447.97 448.02 0.000422 2.60 5120.65 1519.18 0.14
Reach1 8044 5-year 5827.04 431.85 448.51 448.56 0.000392 2.59 5942.31 1534.61 0.14
Reach1 8044 10-year 6373.16 431.85 448.82 448.87 0.000380 2.59 6424.57 1540.37 0.13
Reach1 8044 25-year 6787.82 431.85 449.04 449.09 0.000373 2.61 6764.20 1544.16 0.13
Reach1 8044 50-year 6964.88 431.85 449.14 449.18 0.000371 2.61 6906.49 1545.64 0.13
Reach1 8044 100-year 7680.75 431.85 449.49 449.54 0.000363 2.63 7458.11 1551.93 0.13
Reach1 8044 OLD 500-year 9492.17 431.85 450.32 450.37 0.000357 2.73 8767.93 1617.25 0.13
Reach1 8044 NEW 500-year 12129.69 431.85 451.40 451.45 0.000340 2.81 10567.43 1678.91 0.13
Reach1 7563 2-year 4988.65 420.98 447.91 447.94 0.000091 1.62 5174.38 1371.99 0.07
Reach1 7563 5-year 5827.04 420.98 448.44 448.47 0.000099 1.72 5915.66 1414.23 0.07
Reach1 7563 10-year 6373.16 420.98 448.75 448.79 0.000103 1.78 6357.51 1425.23 0.07
Reach1 7563 25-year 6787.82 420.98 448.97 449.01 0.000106 1.82 6669.84 1434.31 0.08
Reach1 7563 50-year 6964.88 420.98 449.06 449.10 0.000107 1.84 6801.16 1438.02 0.08
Reach1 7563 100-year 7680.75 420.98 449.41 449.45 0.000112 1.90 7312.28 1451.18 0.08
Reach1 7563 OLD 500-year 9492.17 420.98 450.24 450.28 0.000122 2.04 8525.09 1498.39 0.08
Reach1 7563 NEW 500-year 12129.69 420.98 451.32 451.37 0.000129 2.18 10180.41 1542.02 0.09
Reach1 7409 2-year 4988.65 432.53 447.84 447.91 0.000442 2.53 3475.17 1200.08 0.13
Reach1 7409 5-year 5827.04 432.53 448.38 448.45 0.000410 2.51 4142.79 1254.10 0.13
Reach1 7409 10-year 6373.16 432.53 448.70 448.76 0.000391 2.50 4542.01 1265.12 0.12
Reach1 7409 25-year 6787.82 432.53 448.92 448.98 0.000380 2.49 4823.39 1271.19 0.12
Reach1 7409 50-year 6964.88 432.53 449.02 449.08 0.000375 2.49 4941.38 1274.21 0.12
Reach1 7409 100-year 7680.75 432.53 449.37 449.43 0.000361 2.48 5399.91 1286.81 0.12
Reach1 7409 OLD 500-year 9492.17 432.53 450.20 450.26 0.000335 2.49 6482.58 1325.52 0.12
Reach1 7409 NEW 500-year 12129.69 432.53 451.29 451.35 0.000308 2.51 7990.76 1403.26 0.11
Reach1 7315 2-year 4988.65 431.12 447.78 447.87 0.000814 2.73 3296.33 1131.11 0.14
Reach1 7315 5-year 5827.04 431.12 448.32 448.41 0.000786 2.77 3938.48 1201.42 0.14
Reach1 7315 10-year 6373.16 431.12 448.64 448.72 0.000768 2.79 4322.96 1210.31 0.14
Reach1 7315 25-year 6787.82 431.12 448.87 448.95 0.000760 2.81 4593.57 1216.71 0.14
Reach1 7315 50-year 6964.88 431.12 448.96 449.04 0.000756 2.81 4707.15 1219.31 0.14
Reach1 7315 100-year 7680.75 431.12 449.32 449.40 0.000743 2.85 5149.55 1239.89 0.14
Reach1 7315 OLD 500-year 9492.17 431.12 450.16 450.23 0.000708 2.90 6196.48 1262.78 0.14
Reach1 7315 NEW 500-year 12129.69 431.12 451.25 451.32 0.000665 2.95 7658.89 1355.35 0.14
Reach1 7177 2-year 4988.65 429.19 447.59 447.68 0.002590 2.88 2295.96 642.14 0.16
Reach1 7177 5-year 5827.04 429.19 448.15 448.24 0.002413 2.88 2737.69 997.20 0.15
Reach1 7177 10-year 6373.16 429.19 448.48 448.56 0.002268 2.84 3081.58 1079.23 0.15
Reach1 7177 25-year 6787.82 429.19 448.71 448.79 0.002156 2.81 3339.57 1147.44 0.15
Reach1 7177 50-year 6964.88 429.19 448.81 448.88 0.002090 2.78 3452.50 1176.69 0.14
Reach1 7177 100-year 7680.75 429.19 449.18 449.25 0.001850 2.67 3894.80 1185.51 0.14
Reach1 7177 OLD 500-year 9492.17 429.19 450.05 450.11 0.001336 2.38 4928.14 1205.69 0.12
Reach1 7177 NEW 500-year 12129.69 429.19 451.16 451.22 0.000974 2.15 6331.64 1272.51 0.10
Reach1 6895 2-year 4988.65 430.91 447.35 447.44 0.000444 2.77 3211.59 1045.47 0.13
Reach1 6895 5-year 5827.04 430.91 447.93 448.01 0.000423 2.78 3846.58 1118.87 0.13
Reach1 6895 10-year 6373.16 430.91 448.27 448.34 0.000406 2.77 4228.29 1118.87 0.13
Reach1 6895 25-year 6787.82 430.91 448.51 448.58 0.000397 2.77 4494.24 1118.87 0.13
Reach1 6895 50-year 6964.88 430.91 448.61 448.68 0.000394 2.77 4606.82 1118.87 0.13
Reach1 6895 100-year 7680.75 430.91 448.99 449.06 0.000381 2.77 5038.52 1118.87 0.13
Reach1 6895 OLD 500-year 9492.17 430.91 449.89 449.95 0.000356 2.79 6036.28 1118.87 0.12
Reach1 6895 NEW 500-year 12129.69 430.91 451.03 451.09 0.000335 2.83 7312.83 1118.87 0.12
Reach1 6579 2-year 4988.65 426.71 447.26 447.32 0.000328 2.29 4006.66 1478.74 0.12
Reach1 6579 5-year 5827.04 426.71 447.85 447.90 0.000284 2.19 4913.69 1559.66 0.11
Reach1 6579 10-year 6373.16 426.71 448.20 448.24 0.000260 2.14 5457.91 1559.66 0.10
Reach1 6579 25-year 6787.82 426.71 448.44 448.48 0.000247 2.11 5835.12 1559.66 0.10
Reach1 6579 50-year 6964.88 426.71 448.55 448.58 0.000242 2.10 5994.66 1559.66 0.10
Reach1 6579 100-year 7680.75 426.71 448.94 448.97 0.000225 2.06 6604.95 1559.66 0.10
Reach1 6579 OLD 500-year 9492.17 426.71 449.84 449.87 0.000197 2.01 8010.11 1559.66 0.09
Reach1 6579 NEW 500-year 12129.69 426.71 450.99 451.02 0.000174 1.99 9801.48 1559.66 0.09
Reach1 6435 2-year 4988.65 425.59 447.15 447.26 0.000486 2.99 3110.95 1006.03 0.14
Reach1 6435 5-year 5827.04 425.59 447.74 447.84 0.000478 3.05 3739.08 1095.86 0.14
Reach1 6435 10-year 6373.16 425.59 448.09 448.19 0.000469 3.07 4126.79 1102.94 0.14
Reach1 6435 25-year 6787.82 425.59 448.33 448.43 0.000464 3.09 4395.97 1102.94 0.14
Reach1 6435 50-year 6964.88 425.59 448.43 448.53 0.000461 3.09 4510.00 1102.94 0.14
Reach1 6435 100-year 7680.75 425.59 448.83 448.93 0.000451 3.11 4945.72 1102.94 0.14
Reach1 6435 OLD 500-year 9492.17 425.59 449.74 449.83 0.000432 3.16 5947.75 1102.94 0.14
Reach1 6435 NEW 500-year 12129.69 425.59 450.89 450.98 0.000414 3.24 7221.51 1102.94 0.14
Reach1 5840 2-year 4988.65 425.64 446.68 446.90 0.000812 4.01 2077.74 534.46 0.18
Reach1 5840 5-year 5827.04 425.64 447.23 447.48 0.000904 4.33 2392.93 627.71 0.19
Reach1 5840 10-year 6373.16 425.64 447.57 447.83 0.000948 4.50 2611.76 666.63 0.20
Reach1 5840 25-year 6787.82 425.64 447.80 448.07 0.000986 4.63 2768.33 686.02 0.20
Reach1 5840 50-year 6964.88 425.64 447.90 448.18 0.000995 4.67 2838.69 687.93 0.20
Reach1 5840 100-year 7680.75 425.64 448.29 448.57 0.001023 4.81 3110.28 695.05 0.21
Reach1 5840 OLD 500-year 9492.17 425.64 449.21 449.50 0.001060 5.07 3754.50 710.70 0.21
Reach1 5840 NEW 500-year 12129.69 425.64 450.36 450.66 0.001112 5.42 4612.23 787.64 0.22
Reach1 5564 2-year 4988.65 426.81 446.48 446.68 0.000815 3.71 2076.74 468.81 0.18
Reach1 5564 5-year 5827.04 426.81 447.01 447.23 0.000922 4.05 2322.97 471.43 0.20
Reach1 5564 10-year 6373.16 426.81 447.33 447.57 0.000986 4.26 2473.63 472.78 0.20
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 5564 25-year 6787.82 426.81 447.54 447.80 0.001038 4.41 2575.68 473.69 0.21
Reach1 5564 50-year 6964.88 426.81 447.64 447.91 0.001058 4.47 2621.15 474.12 0.21
Reach1 5564 100-year 7680.75 426.81 448.00 448.29 0.001139 4.72 2792.19 475.77 0.22
Reach1 5564 OLD 500-year 9492.17 426.81 448.82 449.18 0.001329 5.30 3187.08 479.85 0.24
Reach1 5564 NEW 500-year 12129.69 426.81 449.86 450.31 0.001579 6.04 3688.81 486.29 0.27
Reach1 5287 2-year 4988.65 427.71 446.13 446.41 0.001105 4.60 1830.24 511.49 0.21
Reach1 5287 5-year 5827.04 427.71 446.60 446.94 0.001263 5.02 2074.63 511.49 0.23
Reach1 5287 10-year 6373.16 427.71 446.90 447.26 0.001356 5.27 2224.72 511.49 0.24
Reach1 5287 25-year 6787.82 427.71 447.09 447.47 0.001432 5.46 2324.10 511.49 0.24
Reach1 5287 50-year 6964.88 427.71 447.18 447.57 0.001460 5.53 2369.40 511.49 0.24
Reach1 5287 100-year 7680.75 427.71 447.51 447.93 0.001576 5.83 2537.92 511.49 0.26
Reach1 5287 OLD 500-year 9492.17 427.71 448.27 448.76 0.001841 6.49 2925.91 511.49 0.28
Reach1 5287 NEW 500-year 12129.69 427.71 449.22 449.82 0.002180 7.33 3415.17 511.49 0.31
Reach1 4999 2-year 4988.65 428.82 445.84 446.10 0.001121 4.24 1851.97 444.61 0.21
Reach1 4999 5-year 5827.04 428.82 446.27 446.57 0.001318 4.68 2045.28 455.63 0.22
Reach1 4999 10-year 6373.16 428.82 446.53 446.87 0.001440 4.95 2165.95 460.98 0.23
Reach1 4999 25-year 6787.82 428.82 446.70 447.06 0.001543 5.16 2244.09 464.26 0.24
Reach1 4999 50-year 6964.88 428.82 446.78 447.15 0.001581 5.24 2280.82 465.42 0.25
Reach1 4999 100-year 7680.75 428.82 447.07 447.48 0.001746 5.57 2415.90 471.13 0.26
Reach1 4999 OLD 500-year 9492.17 428.82 447.72 448.23 0.002151 6.33 2746.57 532.22 0.29
Reach1 4999 NEW 500-year 12129.69 428.82 448.53 449.18 0.002703 7.30 3188.33 559.22 0.32
Reach1 4785 2-year 4988.65 426.89 445.70 445.88 0.000820 3.77 2024.69 529.26 0.18
Reach1 4785 5-year 5827.04 426.89 446.12 446.33 0.000924 4.09 2248.50 533.54 0.20
Reach1 4785 10-year 6373.16 426.89 446.38 446.60 0.000984 4.27 2387.44 536.30 0.20
Reach1 4785 25-year 6787.82 426.89 446.55 446.78 0.001039 4.42 2475.85 538.23 0.21
Reach1 4785 50-year 6964.88 426.89 446.63 446.86 0.001057 4.48 2517.98 539.30 0.21
Reach1 4785 100-year 7680.75 426.89 446.91 447.17 0.001138 4.71 2671.74 543.08 0.22
Reach1 4785 OLD 500-year 9492.17 426.89 447.55 447.86 0.001335 5.25 3027.02 569.26 0.24
Reach1 4785 NEW 500-year 12129.69 426.89 448.35 448.72 0.001590 5.93 3488.50 578.05 0.26
Reach1 4514 2-year 4988.65 427.81 444.96 445.43 0.003783 5.94 1254.42 870.69 0.36
Reach1 4514 5-year 5827.04 427.81 445.61 445.91 0.002631 5.20 1851.01 1046.24 0.30
Reach1 4514 10-year 6373.16 427.81 445.93 446.19 0.002347 5.03 2215.56 1206.80 0.29
Reach1 4514 25-year 6787.82 427.81 446.15 446.37 0.002033 4.75 2490.70 1213.31 0.27
Reach1 4514 50-year 6964.88 427.81 446.25 446.46 0.001914 4.65 2608.49 1216.35 0.26
Reach1 4514 100-year 7680.75 427.81 446.59 446.75 0.001611 4.36 3016.84 1228.28 0.24
Reach1 4514 OLD 500-year 9492.17 427.81 447.31 447.44 0.001214 3.96 3909.77 1253.28 0.21
Reach1 4514 NEW 500-year 12129.69 427.81 448.17 448.29 0.000964 3.72 5015.91 1293.67 0.19
Reach1 4378 2-year 4988.65 427.97 445.19 436.09 445.22 0.000206 1.49 4215.11 1080.21 0.09
Reach1 4378 5-year 5827.04 427.97 445.73 436.67 445.75 0.000197 1.52 4850.19 1236.57 0.09
Reach1 4378 10-year 6373.16 427.97 446.02 437.03 446.05 0.000195 1.54 5211.68 1239.88 0.09
Reach1 4378 25-year 6787.82 427.97 446.22 437.31 446.25 0.000196 1.56 5459.67 1242.16 0.09
Reach1 4378 50-year 6964.88 427.97 446.31 437.42 446.33 0.000195 1.57 5568.29 1243.34 0.09
Reach1 4378 100-year 7680.75 427.97 446.62 437.86 446.65 0.000197 1.61 5954.33 1247.30 0.09
Reach1 4378 OLD 500-year 9492.17 427.97 447.31 438.92 447.34 0.000205 1.71 6820.73 1257.95 0.09
Reach1 4378 NEW 500-year 12129.69 427.97 448.16 440.32 448.20 0.000218 1.86 7924.29 1356.69 0.09
Reach1 4282 Bridge
Reach1 4186 2-year 4988.65 428.17 445.12 437.64 445.15 0.000294 1.87 4025.61 1175.63 0.11
Reach1 4186 5-year 5827.04 428.17 445.67 438.44 445.69 0.000268 1.86 4667.22 1184.45 0.11
Reach1 4186 10-year 6373.16 428.17 445.96 438.91 445.99 0.000261 1.87 5015.56 1188.75 0.11
Reach1 4186 25-year 6787.82 428.17 446.16 439.27 446.19 0.000259 1.89 5253.79 1191.60 0.11
Reach1 4186 50-year 6964.88 428.17 446.25 439.43 446.28 0.000258 1.89 5358.28 1192.84 0.11
Reach1 4186 100-year 7680.75 428.17 446.56 440.00 446.59 0.000258 1.93 5728.51 1197.01 0.11
Reach1 4186 OLD 500-year 9492.17 428.17 447.25 441.47 447.28 0.000264 2.04 6558.34 1207.36 0.11
Reach1 4186 NEW 500-year 12129.69 428.17 448.10 443.84 448.14 0.000277 2.20 7589.63 1223.66 0.11
Reach1 3884 2-year 4988.65 428.59 444.95 445.03 0.000519 2.94 3552.45 1317.21 0.15
Reach1 3884 5-year 5827.04 428.59 445.52 445.59 0.000454 2.84 4303.13 1326.87 0.14
Reach1 3884 10-year 6373.16 428.59 445.82 445.88 0.000436 2.83 4704.90 1346.80 0.14
Reach1 3884 25-year 6787.82 428.59 446.03 446.09 0.000429 2.84 4979.90 1359.54 0.14
Reach1 3884 50-year 6964.88 428.59 446.12 446.17 0.000426 2.84 5101.47 1369.58 0.14
Reach1 3884 100-year 7680.75 428.59 446.43 446.49 0.000421 2.87 5531.89 1385.84 0.14
Reach1 3884 OLD 500-year 9492.17 428.59 447.12 447.18 0.000419 2.97 6511.71 1418.97 0.14
Reach1 3884 NEW 500-year 12129.69 428.59 447.97 448.03 0.000424 3.11 7718.53 1418.97 0.14
Reach1 3598 2-year 4988.65 427.05 444.75 444.85 0.000769 3.46 3584.58 1418.03 0.18
Reach1 3598 5-year 5827.04 427.05 445.35 445.44 0.000629 3.24 4441.74 1421.73 0.16
Reach1 3598 10-year 6373.16 427.05 445.66 445.74 0.000591 3.19 4881.52 1423.67 0.16
Reach1 3598 25-year 6787.82 427.05 445.87 445.95 0.000575 3.18 5175.22 1424.97 0.16
Reach1 3598 50-year 6964.88 427.05 445.96 446.04 0.000567 3.17 5304.19 1425.53 0.16
Reach1 3598 100-year 7680.75 427.05 446.27 446.35 0.000553 3.18 5751.34 1427.32 0.15
Reach1 3598 OLD 500-year 9492.17 427.05 446.96 447.05 0.000540 3.25 6745.24 1471.43 0.15
Reach1 3598 NEW 500-year 12129.69 427.05 447.82 447.90 0.000537 3.38 8035.45 1528.19 0.15
Reach1 3326 2-year 4988.65 429.64 444.71 444.75 0.000268 1.98 4775.72 1576.30 0.11
Reach1 3326 5-year 5827.04 429.64 445.32 445.35 0.000230 1.90 5739.25 1576.41 0.10
Reach1 3326 10-year 6373.16 429.64 445.63 445.66 0.000221 1.90 6230.73 1576.47 0.10
Reach1 3326 25-year 6787.82 429.64 445.84 445.87 0.000218 1.90 6558.17 1576.50 0.10
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 3326 50-year 6964.88 429.64 445.93 445.96 0.000216 1.91 6702.08 1576.57 0.10
Reach1 3326 100-year 7680.75 429.64 446.25 446.28 0.000215 1.93 7199.86 1576.92 0.10
Reach1 3326 OLD 500-year 9492.17 429.64 446.94 446.97 0.000219 2.02 8296.47 1580.26 0.10
Reach1 3326 NEW 500-year 12129.69 429.64 447.80 447.83 0.000228 2.15 9666.39 1641.17 0.10
Reach1 3196 2-year 4988.65 425.18 444.66 444.71 0.000507 2.41 4884.87 1827.81 0.15
Reach1 3196 5-year 5827.04 425.18 445.29 445.33 0.000400 2.25 6028.92 1833.92 0.13
Reach1 3196 10-year 6373.16 425.18 445.60 445.64 0.000371 2.22 6608.04 1837.32 0.13
Reach1 3196 25-year 6787.82 425.18 445.81 445.85 0.000359 2.21 6993.18 1840.18 0.13
Reach1 3196 50-year 6964.88 425.18 445.90 445.94 0.000353 2.21 7162.57 1841.80 0.13
Reach1 3196 100-year 7680.75 425.18 446.22 446.25 0.000342 2.22 7748.36 1849.61 0.12
Reach1 3196 OLD 500-year 9492.17 425.18 446.92 446.95 0.000330 2.28 9050.75 1870.30 0.12
Reach1 3196 NEW 500-year 12129.69 425.18 447.77 447.81 0.000326 2.39 10651.48 1870.30 0.12
Reach1 3097 2-year 4988.65 421.94 444.63 444.68 0.000279 2.46 5518.50 1869.35 0.11
Reach1 3097 5-year 5827.04 421.94 445.26 445.30 0.000240 2.35 6701.90 1885.23 0.10
Reach1 3097 10-year 6373.16 421.94 445.58 445.61 0.000230 2.33 7298.99 1887.51 0.10
Reach1 3097 25-year 6787.82 421.94 445.79 445.82 0.000227 2.33 7695.28 1889.02 0.10
Reach1 3097 50-year 6964.88 421.94 445.88 445.91 0.000225 2.33 7869.58 1889.67 0.10
Reach1 3097 100-year 7680.75 421.94 446.20 446.23 0.000223 2.35 8470.29 1891.69 0.10
Reach1 3097 OLD 500-year 9492.17 421.94 446.89 446.93 0.000226 2.43 9791.28 1896.41 0.10
Reach1 3097 NEW 500-year 12129.69 421.94 447.75 447.79 0.000243 2.60 11420.20 1920.87 0.11
Reach1 2849 2-year 4988.65 426.38 444.55 444.60 0.000314 2.41 4951.13 1635.21 0.12
Reach1 2849 5-year 5827.04 426.38 445.19 445.23 0.000315 2.50 6039.44 1758.78 0.12
Reach1 2849 10-year 6373.16 426.38 445.51 445.55 0.000298 2.47 6604.09 1764.19 0.12
Reach1 2849 25-year 6787.82 426.38 445.72 445.76 0.000292 2.47 6977.39 1767.11 0.12
Reach1 2849 50-year 6964.88 426.38 445.81 445.85 0.000288 2.47 7141.93 1768.40 0.12
Reach1 2849 100-year 7680.75 426.38 446.13 446.17 0.000284 2.49 7706.35 1772.78 0.12
Reach1 2849 OLD 500-year 9492.17 426.38 446.83 446.87 0.000285 2.57 8947.18 1790.54 0.12
Reach1 2849 NEW 500-year 12129.69 426.38 447.68 447.72 0.000301 2.74 10479.13 1800.64 0.12
Reach1 2572 2-year 4988.65 428.22 444.51 444.55 0.000170 1.73 5141.90 1400.74 0.09
Reach1 2572 5-year 5827.04 428.22 445.14 445.18 0.000166 1.78 6049.89 1469.55 0.09
Reach1 2572 10-year 6373.16 428.22 445.46 445.50 0.000169 1.82 6519.55 1471.09 0.09
Reach1 2572 25-year 6787.82 428.22 445.67 445.71 0.000172 1.86 6829.25 1472.16 0.09
Reach1 2572 50-year 6964.88 428.22 445.76 445.80 0.000172 1.87 6965.58 1472.62 0.09
Reach1 2572 100-year 7680.75 428.22 446.08 446.12 0.000179 1.94 7431.24 1474.22 0.10
Reach1 2572 OLD 500-year 9492.17 428.22 446.77 446.81 0.000197 2.11 8451.66 1480.43 0.10
Reach1 2572 NEW 500-year 12129.69 428.22 447.61 447.66 0.000231 2.38 9742.96 1628.83 0.11
Reach1 2389 2-year 4988.65 426.20 444.19 444.46 0.001016 4.34 1853.41 1076.22 0.22
Reach1 2389 5-year 5827.04 426.20 444.83 445.10 0.000995 4.44 2568.98 1174.66 0.22
Reach1 2389 10-year 6373.16 426.20 445.16 445.42 0.000999 4.52 2958.21 1229.62 0.22
Reach1 2389 25-year 6787.82 426.20 445.37 445.63 0.001005 4.58 3223.01 1257.41 0.22
Reach1 2389 50-year 6964.88 426.20 445.46 445.72 0.001001 4.59 3343.33 1258.73 0.22
Reach1 2389 100-year 7680.75 426.20 445.78 446.04 0.001012 4.69 3745.57 1263.04 0.22
Reach1 2389 OLD 500-year 9492.17 426.20 446.48 446.73 0.001044 4.92 4626.67 1275.23 0.23
Reach1 2389 NEW 500-year 12129.69 426.20 447.31 447.57 0.001102 5.24 5703.71 1311.55 0.23
Reach1 2148 2-year 4988.65 426.66 444.02 444.22 0.000887 3.84 2316.46 1100.41 0.20
Reach1 2148 5-year 5827.04 426.66 444.66 444.86 0.000866 3.93 3071.27 1271.62 0.20
Reach1 2148 10-year 6373.16 426.66 444.99 445.19 0.000853 3.97 3495.36 1308.61 0.20
Reach1 2148 25-year 6787.82 426.66 445.21 445.40 0.000845 4.00 3778.10 1308.61 0.20
Reach1 2148 50-year 6964.88 426.66 445.31 445.49 0.000837 4.00 3906.14 1308.61 0.20
Reach1 2148 100-year 7680.75 426.66 445.63 445.81 0.000837 4.06 4325.78 1308.61 0.20
Reach1 2148 OLD 500-year 9492.17 426.66 446.32 446.50 0.000852 4.24 5232.64 1308.61 0.20
Reach1 2148 NEW 500-year 12129.69 426.66 447.15 447.34 0.000890 4.51 6314.81 1308.61 0.21
Reach1 1880 2-year 4988.65 426.55 443.41 443.87 0.001920 5.69 1691.87 893.06 0.29
Reach1 1880 5-year 5827.04 426.55 444.13 444.54 0.001739 5.64 2395.99 1014.32 0.28
Reach1 1880 10-year 6373.16 426.55 444.47 444.87 0.001707 5.69 2759.19 1095.83 0.28
Reach1 1880 25-year 6787.82 426.55 444.71 445.08 0.001673 5.70 3014.78 1107.29 0.28
Reach1 1880 50-year 6964.88 426.55 444.81 445.18 0.001647 5.68 3134.78 1115.52 0.28
Reach1 1880 100-year 7680.75 426.55 445.15 445.50 0.001634 5.76 3513.85 1175.27 0.28
Reach1 1880 OLD 500-year 9492.17 426.55 445.87 446.20 0.001592 5.88 4370.45 1200.10 0.27
Reach1 1880 NEW 500-year 12129.69 426.55 446.71 447.03 0.001569 6.07 5389.41 1202.61 0.28
Reach1 1595 2-year 4988.65 427.82 442.42 437.06 443.13 0.003405 6.91 1096.30 672.96 0.38
Reach1 1595 5-year 5827.04 427.82 443.32 443.90 0.002792 6.62 1800.81 899.21 0.35
Reach1 1595 10-year 6373.16 427.82 443.78 444.28 0.002469 6.39 2232.22 985.65 0.33
Reach1 1595 25-year 6787.82 427.82 444.08 444.53 0.002260 6.22 2544.44 1044.31 0.32
Reach1 1595 50-year 6964.88 427.82 444.21 444.65 0.002190 6.17 2681.65 1062.10 0.31
Reach1 1595 100-year 7680.75 427.82 444.63 445.00 0.001958 5.97 3123.47 1062.10 0.30
Reach1 1595 OLD 500-year 9492.17 427.82 445.42 445.74 0.001720 5.83 3963.86 1062.10 0.28
Reach1 1595 NEW 500-year 12129.69 427.82 446.29 446.59 0.001627 5.91 4885.81 1062.10 0.28
Reach1 1309 2-year 4988.65 424.55 441.84 442.33 0.001983 5.67 1157.75 585.52 0.30
Reach1 1309 5-year 5827.04 424.55 442.75 443.23 0.001848 5.76 1819.18 913.80 0.29
Reach1 1309 10-year 6373.16 424.55 443.24 443.68 0.001719 5.70 2280.41 974.68 0.28
Reach1 1309 25-year 6787.82 424.55 443.57 443.98 0.001620 5.62 2603.85 980.27 0.27
Reach1 1309 50-year 6964.88 424.55 443.71 444.11 0.001570 5.58 2746.97 983.53 0.27
Reach1 1309 100-year 7680.75 424.55 444.15 444.51 0.001491 5.55 3176.31 990.40 0.26
Reach1 1309 OLD 500-year 9492.17 424.55 444.93 445.28 0.001471 5.72 3952.99 990.40 0.26
HEC-RAS Plan: DentonCreek Multiyear River: DentonCreek Reach: Reach1 (Continued)
Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
Reach1 1309 NEW 500-year 12129.69 424.55 445.77 446.13 0.001552 6.10 4783.69 990.40 0.27
Reach1 1194 2-year 4988.65 423.32 441.53 442.07 0.002440 5.99 1009.66 466.41 0.32
Reach1 1194 5-year 5827.04 423.32 442.44 442.98 0.002279 6.11 1500.68 676.08 0.32
Reach1 1194 10-year 6373.16 423.32 442.92 443.44 0.002184 6.14 1847.35 789.37 0.31
Reach1 1194 25-year 6787.82 423.32 443.25 443.75 0.002093 6.12 2128.26 903.49 0.31
Reach1 1194 50-year 6964.88 423.32 443.40 443.89 0.002034 6.09 2267.10 915.66 0.30
Reach1 1194 100-year 7680.75 423.32 443.89 444.31 0.001826 5.92 2714.34 915.66 0.29
Reach1 1194 OLD 500-year 9492.17 423.32 444.71 445.09 0.001692 5.93 3469.49 915.66 0.28
Reach1 1194 NEW 500-year 12129.69 423.32 445.56 445.94 0.001716 6.22 4243.42 915.66 0.29
Reach1 1078 2-year 4988.65 421.60 441.03 441.74 0.003107 6.88 815.98 317.80 0.35
Reach1 1078 5-year 5827.04 421.60 441.96 442.67 0.002935 7.04 1282.08 652.43 0.35
Reach1 1078 10-year 6373.16 421.60 442.46 443.14 0.002828 7.08 1614.50 679.89 0.34
Reach1 1078 25-year 6787.82 421.60 442.81 443.46 0.002700 7.05 1871.02 790.20 0.34
Reach1 1078 50-year 6964.88 421.60 442.94 443.60 0.002739 7.14 1971.46 808.71 0.34
Reach1 1078 100-year 7680.75 421.60 443.43 444.05 0.002598 7.12 2392.78 884.88 0.33
Reach1 1078 OLD 500-year 9492.17 421.60 444.34 444.86 0.002337 7.04 3234.55 934.05 0.32
Reach1 1078 NEW 500-year 12129.69 421.60 445.24 445.72 0.002242 7.16 4077.21 934.05 0.32
Reach1 914 2-year 4988.65 426.21 440.36 441.15 0.004178 7.11 704.71 87.71 0.41
Reach1 914 5-year 5827.04 426.21 441.18 442.07 0.004331 7.60 815.65 289.83 0.42
Reach1 914 10-year 6373.16 426.21 441.59 436.29 442.54 0.004443 7.90 966.83 446.85 0.43
Reach1 914 25-year 6787.82 426.21 441.89 436.60 442.87 0.004454 8.07 1129.04 624.79 0.44
Reach1 914 50-year 6964.88 426.21 442.01 436.73 443.00 0.004472 8.14 1206.10 682.76 0.44
Reach1 914 100-year 7680.75 426.21 442.49 437.24 443.48 0.004338 8.26 1545.23 722.99 0.43
Reach1 914 OLD 500-year 9492.17 426.21 443.52 444.36 0.003736 8.12 2469.59 945.71 0.41
Reach1 914 NEW 500-year 12129.69 426.21 444.60 445.28 0.003171 7.92 3532.57 997.81 0.38
Reach1 683 2-year 4988.65 425.79 439.84 440.25 0.002610 5.55 1471.53 345.64 0.33
Reach1 683 5-year 5827.04 425.79 440.74 441.13 0.002513 5.56 1804.83 393.60 0.33
Reach1 683 10-year 6373.16 425.79 441.19 441.59 0.002438 5.66 1984.88 408.42 0.33
Reach1 683 25-year 6787.82 425.79 441.51 441.92 0.002394 5.73 2119.41 425.36 0.32
Reach1 683 50-year 6964.88 425.79 441.63 442.04 0.002392 5.78 2171.87 434.18 0.33
Reach1 683 100-year 7680.75 425.79 442.10 442.53 0.002373 5.94 2417.71 632.92 0.33
Reach1 683 OLD 500-year 9492.17 425.79 443.13 443.53 0.002185 6.07 3315.97 1071.74 0.32
Reach1 683 NEW 500-year 12129.69 425.79 444.17 444.57 0.002131 6.36 4495.26 1150.99 0.32
Reach1 611 2-year 4988.65 425.04 439.60 440.05 0.002547 5.65 1380.90 347.27 0.33
Reach1 611 5-year 5827.04 425.04 440.50 440.93 0.002399 5.71 1713.07 401.78 0.32
Reach1 611 10-year 6373.16 425.04 440.95 441.39 0.002358 5.83 1904.22 462.53 0.32
Reach1 611 25-year 6787.82 425.04 441.26 441.72 0.002363 5.96 2064.97 539.95 0.32
Reach1 611 50-year 6964.88 425.04 441.38 441.84 0.002360 6.00 2132.91 560.04 0.32
Reach1 611 100-year 7680.75 425.04 441.86 442.33 0.002342 6.15 2416.42 634.28 0.32
Reach1 611 OLD 500-year 9492.17 425.04 442.86 443.34 0.002301 6.46 3285.51 1099.03 0.33
Reach1 611 NEW 500-year 12129.69 425.04 444.00 444.41 0.002000 6.39 4608.97 1174.17 0.31
Reach1 353 2-year 4988.65 426.01 437.99 439.02 0.006038 8.17 655.73 119.90 0.49
Reach1 353 5-year 5827.04 426.01 438.81 435.20 439.92 0.006118 8.58 910.16 467.60 0.50
Reach1 353 10-year 6373.16 426.01 439.40 435.62 440.43 0.005504 8.44 1203.33 524.28 0.48
Reach1 353 25-year 6787.82 426.01 439.85 435.91 440.80 0.004992 8.25 1454.33 567.79 0.46
Reach1 353 50-year 6964.88 426.01 440.03 440.94 0.004805 8.17 1555.16 575.80 0.45
Reach1 353 100-year 7680.75 426.01 440.67 441.49 0.004237 7.94 1938.78 616.87 0.42
Reach1 353 OLD 500-year 9492.17 426.01 441.87 442.56 0.003704 7.77 2720.93 681.61 0.40
Reach1 353 NEW 500-year 12129.69 426.01 443.14 443.74 0.003210 7.75 3853.23 1009.47 0.38
Reach1 239 2-year 4988.65 425.41 437.17 438.27 0.007079 8.43 612.13 95.65 0.53
Reach1 239 5-year 5827.04 425.41 437.93 434.81 439.15 0.007370 8.91 698.17 151.88 0.55
Reach1 239 10-year 6373.16 425.41 438.39 435.20 439.68 0.007479 9.17 785.54 240.60 0.56
Reach1 239 25-year 6787.82 425.41 438.74 435.50 440.08 0.007560 9.35 886.97 369.65 0.56
Reach1 239 50-year 6964.88 425.41 438.90 435.64 440.23 0.007499 9.38 947.46 410.21 0.56
Reach1 239 100-year 7680.75 425.41 439.60 436.14 440.85 0.006939 9.21 1252.27 478.95 0.54
Reach1 239 OLD 500-year 9492.17 425.41 440.98 442.03 0.005459 8.89 1984.33 573.13 0.49
Reach1 239 NEW 500-year 12129.69 425.41 442.27 443.27 0.004903 9.12 2751.02 634.73 0.47
Reach1 83 2-year 4988.65 424.15 436.00 433.56 437.10 0.007905 8.42 601.30 98.81 0.56
Reach1 83 5-year 5827.04 424.15 436.74 434.13 437.96 0.007907 8.86 677.15 105.80 0.57
Reach1 83 10-year 6373.16 424.15 437.20 434.49 438.48 0.007912 9.12 726.17 110.13 0.57
Reach1 83 25-year 6787.82 424.15 437.53 434.75 438.87 0.007905 9.30 763.95 113.64 0.57
Reach1 83 50-year 6964.88 424.15 437.67 434.84 439.03 0.007907 9.37 780.07 115.38 0.57
Reach1 83 100-year 7680.75 424.15 438.23 435.32 439.67 0.007909 9.67 849.01 137.88 0.58
Reach1 83 OLD 500-year 9492.17 424.15 439.36 436.39 440.97 0.007896 10.33 1196.86 448.62 0.59
Reach1 83 NEW 500-year 12129.69 424.15 440.55 437.62 442.25 0.007904 10.98 1888.48 611.05 0.60
0100002000030000400005000060000420440460480500520Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017 Main Channel Distance (ft)Elevation (ft)LegendWS NEW 500-yearWS OLD 500-yearWS 100-yearWS 50-yearWS 25-yearWS 10-yearWS 5-yearWS 2-yearLat StructGroundLeft LeveeDentonCreek Reach1
0 50 100 150 200 250 300 350 400
495
500
505
510
515
520
525
530
535
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .035 .15
0 100 200 300 400 500 600
495
500
505
510
515
520
525
530
535
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .05 .15
0 100 200 300 400 500
480
490
500
510
520
530
540
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .05 .15
0 100 200 300 400 500 600 700
480
490
500
510
520
530
540
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .06 .05 .15
0 100 200 300 400 500 600 700 800
480
490
500
510
520
530
540
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
6
.045 .15
0 200 400 600 800 1000
470
480
490
500
510
520
530
540
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .05 .15
0 100 200 300 400 500 600 700 800
470
480
490
500
510
520
530
540
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .05 .15
0 100 200 300 400 500 600 700
470
480
490
500
510
520
530
540
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .045 .15
0 100 200 300 400 500 600 700 800
470
480
490
500
510
520
530
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .045 .15
0 100 200 300 400 500 600 700 800
470
480
490
500
510
520
530
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .045 .15
0 200 400 600 800 1000
470
480
490
500
510
520
530
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .045 .15
0 200 400 600 800 1000 1200
470
480
490
500
510
520
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.03 .045 .03
0 200 400 600 800 1000 1200 1400
470
480
490
500
510
520
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.03 .045 .03
0 200 400 600 800 1000 1200 1400 1600 1800
470
480
490
500
510
520
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.03 .
0
4
5
.03
0 500 1000 1500 2000
470
480
490
500
510
520
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.03 .
0
4
5
.03
0 500 1000 1500 2000
470
475
480
485
490
495
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.03 .
0
4
5
.03 .065
0 500 1000 1500 2000 2500 3000
465
470
475
480
485
490
495
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.03 .
0
4
5
.03
0 500 1000 1500 2000 2500 3000 3500
465
470
475
480
485
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.03 .
0
5
5
.03 .
0
5
.03 .05 .03
0 1000 2000 3000 4000 5000
465
470
475
480
485
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 2-year
WS 25-year
WS 10-year
WS 5-year
Ground
Ineff
Bank Sta
.075 .03 .
0
5
.03 .
0
5
.03 .
0
4
5
.
0
3
.07 .
0
3
0 1000 2000 3000 4000 5000
460
465
470
475
480
485
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.045 .075 .
0
3
.
0
5
.
0
5
5
.
0
3
.
0
4
.03 .
0
5
.03 .
0
4
5
.
0
3
.085 .
0
3
0 1000 2000 3000 4000 5000
460
465
470
475
480
485
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.
0
2
5
.035 .
0
3
.06 .03 .
0
4
.
0
3
.
0
5
.
0
3
5
.
0
3
.07
0 1000 2000 3000 4000 5000
460
465
470
475
480
485
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.
0
4
.
0
2
5
.
0
3
5
.
0
3
.
0
5
5
.03 .
0
5
5
.
0
3
.
0
5
.
0
3
.
0
5
.03 .035 .
0
4
5
0 1000 2000 3000 4000 5000
455
460
465
470
475
480
485
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.
0
4
.
0
2
5
.
0
3
.
0
4
.03 .
0
5
5
.03 .
0
5
.03 .
0
5
.03 .
0
5
0 1000 2000 3000 4000 5000
450
460
470
480
490
500
510
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.
0
4
.
0
2
5
.
0
3
5
.03 .
0
5
5
.03 .
0
5
.
0
3
.
0
5
.055
0 500 1000 1500 2000 2500 3000 3500 4000
450
455
460
465
470
475
480
485
490
495
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.
0
3
5
.
0
2
5
.
0
3
5
.03 .05 .03 .
0
5
5
.03 .055 .035
0 500 1000 1500 2000 2500 3000 3500
450
455
460
465
470
475
480
485
490
495
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Grapevine Lake spillway channel in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.
0
3
5
.
0
2
5
.
0
3
5
.03 .055 .
0
7
.
0
5
.035
0 500 1000 1500 2000 2500 3000 3500
450
455
460
465
470
475
480
485
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.03 .
0
2
5
.035 .045 .06 .03 .
0
6
.
0
5
.035
0 500 1000 1500 2000 2500 3000 3500
450
455
460
465
470
475
480
485
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .
0
2
5
.035 .085 .
0
5
.035
0 500 1000 1500 2000 2500 3000 3500
450
455
460
465
470
475
480
485
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .
0
2
5
.045 .085 .
0
5
.035
0 500 1000 1500 2000 2500 3000 3500
450
460
470
480
490
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .
0
3
5
.
0
2
5
.04 .085 .
0
5
.
0
4
.035
0 500 1000 1500 2000 2500 3000 3500
450
460
470
480
490
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .035 .025 .
0
3
5
.085 .
0
4
5
.03
500 1000 1500 2000 2500 3000 3500 4000 4500
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.03 .03 .
0
4
.03
500 1000 1500 2000 2500 3000 3500 4000 4500
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
FM 2499 - Grapevine Mills Parkway
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.03 .03 .
0
4
.03
500 1000 1500 2000 2500 3000 3500 4000 4500
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
FM 2499 - Grapevine Mills Parkway
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.08 .08 .
0
4
.03
500 1000 1500 2000 2500 3000 3500 4000 4500
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.08 .08 .
0
4
.03
0 500 1000 1500 2000 2500 3000
450
460
470
480
490
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.08 .08 .
0
5
.035 .
0
6
0 500 1000 1500 2000 2500 3000
450
460
470
480
490
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.04 .04 .05 .075 .
0
7
5
.
0
5
.
0
3
5
.
0
5
5
0 500 1000 1500 2000 2500 3000
450
460
470
480
490
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.04 .06 .075 .
0
5
.
0
3
5
.
0
6
0 500 1000 1500 2000 2500 3000
450
460
470
480
490
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.04 .065 .06 .07 .
0
5
.
0
3
5
.
0
6
0 500 1000 1500 2000 2500 3000
450
460
470
480
490
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.04 .07 .05 .
0
6
5
.
0
5
.035 .
0
6
0 500 1000 1500 2000 2500 3000
450
460
470
480
490
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.04 .04 .075 .
0
5
5
.
0
6
.
0
5
.
0
3
5
.
0
3
.
0
5
5
0 500 1000 1500 2000 2500 3000
450
460
470
480
490
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.045 .075 .
0
5
.
0
7
.
0
5
.
0
3
5
.
0
3
.
0
6
0 500 1000 1500 2000 2500 3000
450
455
460
465
470
475
480
485
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.04 .085 .
0
3
5
.
0
6
5
.
0
5
.
0
4
.03
0 500 1000 1500 2000 2500 3000
450
455
460
465
470
475
480
485
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.045 .035 .
0
6
.035 .
0
6
.
0
5
.
0
4
.03
0 500 1000 1500 2000 2500 3000
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.045 .035 .
0
5
.
0
4
5
.
0
4
.065
0 500 1000 1500 2000 2500 3000
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.045 .
0
3
5
.085 .
0
5
.
0
4
5
.
0
2
5
0 500 1000 1500 2000 2500
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.045 .035 .07 .05 .
0
4
5
.025
1000 1500 2000 2500 3000 3500
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.03 .
0
3
.04 .
0
4
.03
1000 1500 2000 2500 3000 3500
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lakeside Parkway
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.03 .
0
3
.04 .
0
4
.03
1000 1500 2000 2500 3000 3500
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lakeside Parkway
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.03 .
0
3
.04 .
0
4
.03
1000 1500 2000 2500 3000 3500
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.03 .
0
3
.04 .
0
4
.03
0 200 400 600 800 1000 1200 1400 1600 1800
440
450
460
470
480
490
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.07 .04 .
0
8
.05 .12 .
0
2
5
0 200 400 600 800 1000 1200 1400
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.07 .04 .
0
8
.05 .12 .025
0 200 400 600 800 1000 1200 1400
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.07 .04 .
0
8
.05 .12 .025
0 200 400 600 800 1000 1200 1400 1600
440
450
460
470
480
490
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.075 .04 .
0
8
.05 .12 .025
0 500 1000 1500 2000
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.045 .
0
8
.05 .
1
2
.04 .025
0 500 1000 1500 2000
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.045 .
0
8
.
0
5
.
1
2
.04 .025
0 500 1000 1500 2000 2500
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.07 .04 .
0
8
.
0
5
.12 .04
0 500 1000 1500 2000 2500
440
450
460
470
480
490
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.07 .
0
5
.12 .04
0 500 1000 1500 2000 2500
440
450
460
470
480
490
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.07 .05 .12 .04
0 500 1000 1500 2000 2500
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.07 .05 .12 .04
0 500 1000 1500 2000
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.07 .05 .12 .04
0 500 1000 1500 2000
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.035 .
0
5
.05 .12 .04
0 500 1000 1500 2000
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.035 .05 .12 .12 .04
0 500 1000 1500 2000 2500
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.035 .035 .035 .
0
5
.
0
7
5
.12 .04
0 500 1000 1500 2000
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.035 .05 .09 .04
0 500 1000 1500 2000
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.035 .06 .09 .04
0 500 1000 1500 2000
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.035 .05 .09 .04
0 200 400 600 800 1000 1200 1400 1600 1800
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.035 .05 .09 .04
0 500 1000 1500 2000
445
450
455
460
465
470
475
480
485
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.035 .05 .09
0 500 1000 1500 2000
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.035 .1 .05 .
0
3
5
.
0
9
0 200 400 600 800 1000 1200 1400 1600 1800
445
450
455
460
465
470
475
480
485
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.035 .
0
3
5
.1 .9 .
0
3
0 200 400 600 800 1000 1200 1400 1600
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.035 .05 .08 .035
0 200 400 600 800 1000 1200 1400
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.035 .06 .05 .08 .03 .03
0 200 400 600 800 1000 1200 1400
445
450
455
460
465
470
475
480
485
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .
0
5
.08 .03
0 200 400 600 800 1000
440
450
460
470
480
490
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .035 .05 .
0
8
.03
0 500 1000 1500 2000 2500
440
450
460
470
480
490
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
SH 121 Upstream cross section
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.03 .
0
3
.
0
4
.03 .03
0 500 1000 1500 2000 2500
440
450
460
470
480
490
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
State Highway 121
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.03 .
0
3
.
0
4
.03 .03
0 500 1000 1500 2000 2500
440
450
460
470
480
490
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
State Highway 121
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.03 .03 .
0
5
.03 .03
0 500 1000 1500 2000 2500
440
450
460
470
480
490
500
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
SH 121 downstream boundary cross section
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.03 .03 .
0
5
.03 .03
0 200 400 600 800 1000 1200
440
445
450
455
460
465
470
475
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .055 .03 .
0
2
5
.
1
2
0 200 400 600 800 1000 1200
435
440
445
450
455
460
465
470
475
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.025 .
0
3
5
.
0
5
5
.03 .045
-200 0 200 400 600 800 1000 1200
440
445
450
455
460
465
470
475
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.025 .
0
3
5
.
1
.
0
4
.055 .03 .12
0 200 400 600 800 1000 1200
440
445
450
455
460
465
470
475
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.025 .
0
3
5
.
0
5
5
.03 .
1
2
.
0
3
0 200 400 600 800 1000 1200 1400
440
445
450
455
460
465
470
475
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.025 .
0
3
5
.
0
5
5
.03 .025 .
1
2
.
0
3
-200 0 200 400 600 800 1000 1200 1400 1600
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.
0
2
5
.025 .
0
3
5
.
0
5
5
.025 .1
-500 0 500 1000 1500 2000
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.
0
2
5
.
0
3
5
.025 .
0
3
5
.
0
5
5
.025 .025 .1
-200 0 200 400 600 800 1000 1200 1400 1600 1800
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.
0
2
5
.
0
3
5
.025 .
0
3
5
.
0
5
5
.025 .1
0 500 1000 1500 2000
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.025 .
0
3
5
.
0
5
5
.025 .1 .15
-500 0 500 1000 1500 2000
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.025 .
0
3
5
.
1
.
0
5
5
.
0
2
5
.1 .15
0 200 400 600 800 1000 1200 1400 1600 1800
435
440
445
450
455
460
465
470
475
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.05 .025 .
0
3
5
.
0
5
5
.03 .15
0 200 400 600 800 1000 1200 1400 1600 1800
435
440
445
450
455
460
465
470
475
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.1 .
0
5
5
.03 .15 .
0
3
0 200 400 600 800 1000 1200 1400 1600 1800
435
440
445
450
455
460
465
470
475
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Pedestrian Bridge
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.1 .
0
5
5
.03 .15 .
0
3
-500 0 500 1000 1500 2000
435
440
445
450
455
460
465
470
475
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Pedestrian Bridge
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.1 .1 .1 .
0
5
5
.03 .
1
5
.03
-500 0 500 1000 1500 2000
435
440
445
450
455
460
465
470
475
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.1 .1 .1 .
0
5
5
.03 .
1
5
.03
0 500 1000 1500 2000
435
440
445
450
455
460
465
470
475
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.1 .
0
5
5
.03 .
1
5
.03
0 200 400 600 800 1000 1200 1400 1600 1800
440
445
450
455
460
465
470
475
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.1 .
0
5
5
.03 .
1
5
.03
-500 0 500 1000 1500 2000
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .1 .
0
5
5
.03 .
1
5
.025 .1
-500 0 500 1000 1500 2000
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .1 .
0
5
5
.03 .
1
5
.025 .
1
5
.1
-200 0 200 400 600 800 1000 1200 1400 1600 1800
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .1 .
0
5
5
.03 .15 .025 .1
-500 0 500 1000 1500 2000 2500
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.025 .
0
3
5
.055 .03 .
1
5
.025 .
1
0 500 1000 1500 2000 2500
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .025 .
0
3
5
.
0
5
5
.03 .
1
5
.025 .
1
0 500 1000 1500 2000 2500 3000
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .15 .
0
3
5
.
0
2
5
.
0
3
5
.
0
5
5
.025 .
1
5
.03 .1
0 500 1000 1500 2000
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.
1
5
.035 .025 .
0
3
5
.
0
5
5
.15 .
0
3
.
1
5
.025 .1
0 500 1000 1500 2000
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .035 .025 .
0
3
5
.
0
5
5
.15 .
0
3
.
1
5
.025 .1
-200 0 200 400 600 800 1000 1200 1400 1600 1800
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .035 .025 .
0
3
5
.
0
5
5
.
1
5
.025 .1
0 200 400 600 800 1000 1200 1400 1600
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .035 .
0
3
5
.
1
5
.025 .1
-200 0 200 400 600 800 1000 1200 1400 1600
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .05 .
0
5
5
.
1
5
.025 .1 .15
-200 0 200 400 600 800 1000 1200 1400 1600
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Sanitary Sewer Crossing
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .05 .
0
5
5
.
1
5
.025 .1 .15
0 200 400 600 800 1000 1200 1400 1600
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Sanitary Sewer Crossing
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .05 .
0
5
5
.
1
5
.025 .1 .15
0 200 400 600 800 1000 1200 1400 1600
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .05 .
0
5
5
.
1
5
.025 .1 .15
-200 0 200 400 600 800 1000 1200
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.05 .1 .
0
5
5
.15 .03 .
1
-200 0 200 400 600 800 1000 1200 1400 1600
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .05 .1 .
0
5
5
.12 .
1
-200 0 200 400 600 800 1000 1200 1400 1600
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Westhaven project in LOB
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .
0
3
5
.05 .1 .
0
5
5
.12 .
1
0 500 1000 1500 2000 2500
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .035 .025 .
0
5
5
.
1
2
0 500 1000 1500 2000 2500
430
435
440
445
450
455
460
465
470
475
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.1 .
0
5
5
.
1
2
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
475
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.1 .025 .
1
5
.
0
5
5
.
1
2
.
0
3
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.1 .025 .
1
5
.
0
5
5
.
1
2
.
0
3
0 100 200 300 400 500 600 700 800
430
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.1 .025 .025 .
0
2
5
.15 .055 .
1
2
.03
0 100 200 300 400 500 600 700 800
430
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.1 .025 .15 .055 .
1
2
.03
0 200 400 600 800
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.1 .025 .15 .055 .
1
2
.03
0 200 400 600 800 1000
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.
1
.025 .025 .15 .055 .
1
2
.03 .03
0 200 400 600 800 1000 1200
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.1 .025 .12 .
0
5
5
.
1
2
.03
0 200 400 600 800 1000 1200 1400 1600
430
440
450
460
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.1 .025 .025 .
1
2
.055 .
1
2
.03 .03 .03
0 200 400 600 800 1000 1200 1400
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.
1
.025 .
1
2
.
0
5
5
.
1
2
.03
0 200 400 600 800 1000 1200 1400
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.1 .025 .
1
2
.
0
5
5
.
1
2
.03
0 200 400 600 800 1000 1200 1400
430
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.1 .025 .
1
2
.055 .
1
2
.03
0 200 400 600 800 1000 1200 1400 1600
430
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.1 .025 .
1
2
.
0
5
5
.
1
2
.03
0 200 400 600 800 1000 1200 1400 1600 1800
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.
1
.12 .025 .
1
2
.
0
5
5
.
1
2
.03 .03
0 500 1000 1500 2000 2500
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.1 .
1
2
.025 .
1
2
.
0
5
5
.
1
2
.03 .03
0 500 1000 1500 2000 2500
430
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.1 .12 .025 .
1
2
.
0
5
5
.
1
2
.03 .
1
2
.
0
5
5
.12
0 500 1000 1500 2000
430
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Denton Tap Road upstream bounding cross-section.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.1 .1 .055 .03 .03 .
0
5
5
0 500 1000 1500 2000
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Denton Tap Rd
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.1 .1 .055 .03 .03 .
0
5
5
0 500 1000 1500 2000
435
440
445
450
455
460
465
470
475
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Denton Tap Rd
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.1 .1 .055 .03 .03 .
0
5
5
0 500 1000 1500 2000
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Denton Tap Road downstream bounding cross-section
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.1 .1 .055 .03 .03 .
0
5
5
0 500 1000 1500 2000
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.1 .
1
2
.
0
5
5
.03 .03 .
0
5
5
.
1
2
0 500 1000 1500 2000
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.1 .
1
2
.
0
5
5
.
0
3
.03 .03 .
0
5
5
.
1
2
0 500 1000 1500 2000 2500
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.1 .
0
5
5
.
1
2
.03 .
1
2
.
1
.
0
5
5
.1
0 500 1000 1500 2000 2500
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.03 .
0
4
5
.
1
2
.055 .03 .
1
2
.
0
5
5
.12 .1
0 500 1000 1500 2000 2500
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
TOP of Weir 1 at 444.0. No survey.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.03 .
0
4
5
.
1
2
.
0
5
5
.
0
1
2
.
0
5
5
.
1
2
.
0
5
5
.03 .12 .
0
5
5
.1
0 500 1000 1500 2000 2500
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.03 .
0
4
5
.
1
2
.
0
5
5
.
1
2
.
0
5
5
.12 .055 .1
0 500 1000 1500 2000 2500
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.
0
5
5
.12 .
0
5
5
.12 .1
0 500 1000 1500 2000 2500
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.03 .
0
4
5
.
1
2
.
0
5
5
.12 .
0
5
5
.12 .1
0 500 1000 1500 2000 2500
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.03 .
0
4
5
.
1
2
.
0
5
5
.12 .03 .
0
5
5
.
1
2
.1
0 500 1000 1500 2000 2500
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.03 .
0
4
5
.
1
2
.
0
5
5
.
0
3
.12 .025 .1
0 500 1000 1500 2000 2500
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.03 .
0
4
5
.
1
2
.
0
5
5
.12 .025 .1
0 500 1000 1500 2000 2500
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.03 .
0
4
5
.
1
2
.
0
5
5
.
1
2
.03 .1
0 500 1000 1500 2000 2500
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.12 .
0
5
5
.
1
2
.03 .1
0 500 1000 1500 2000 2500
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.
0
5
5
.
1
2
.03 .1
0 500 1000 1500 2000 2500
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.03 .1 .1
0 500 1000 1500 2000 2500
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.03 .1
-500 0 500 1000 1500 2000 2500
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.03 .1
0 500 1000 1500 2000 2500
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB. Top of Weir #2 in bypass channel set at 44
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.
0
5
5
.12 .03 .1
-500 0 500 1000 1500 2000 2500
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.
0
5
5
.
1
2
.03 .1
0 500 1000 1500 2000 2500
430
440
450
460
470
480
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.
0
5
5
.
1
2
.03 .1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.
0
5
5
.
1
2
.025 .1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.
0
5
5
.
1
2
.025 .1
-500 0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.
0
5
5
.
1
2
.025 .1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.
0
5
5
.
1
2
.025 .1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 50-year
WS 100-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.
0
5
5
.
1
2
.025 .1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.12 .
0
5
5
.
1
2
.03 .1
-500 0 500 1000 1500 2000 2500
430
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.12 .
0
5
5
.
1
2
.025 .1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.12 .
0
5
5
.
1
2
.03 .025 .1
-500 0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.12 .
0
5
5
.
1
2
.03 .1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 50-year
WS 100-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.03 .1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 50-year
WS 100-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.
0
5
5
.
1
2
.03 .1
-500 0 500 1000 1500 2000
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 50-year
WS 100-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.12 .
0
5
5
.
1
2
.025 .1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 50-year
WS 25-year
WS 100-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.025 .1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.025 .1
-500 0 500 1000 1500 2000
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.025 .1 .1
0 500 1000 1500 2000 2500
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.025 .1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.
0
2
5
.025 .
0
2
5
.1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Pedestrian Bridge
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.
0
2
5
.025 .
0
2
5
.1
-500 0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Pedestrian Bridge
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.
0
2
5
.025 .
0
2
5
.1
-500 0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.
0
2
5
.025 .
0
2
5
.1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.12 .025 .1
0 500 1000 1500 2000 2500 3000
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.1 .03 .1
0 500 1000 1500 2000 2500 3000
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.1
-500 0 500 1000 1500 2000 2500 3000
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.1
0 500 1000 1500 2000 2500 3000
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.1
0 500 1000 1500 2000 2500 3000
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB. Weir 3 TOP set at 439.5 per plans
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.
0
5
5
.
1
2
.1
0 500 1000 1500 2000 2500 3000 3500
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.
0
5
5
.
1
2
.1
0 500 1000 1500 2000 2500 3000 3500
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.1 .
0
5
5
.1
0 500 1000 1500 2000 2500 3000 3500
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.1 .
0
5
5
.1
0 500 1000 1500 2000 2500 3000
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
1
2
.1 .055 .1
0 500 1000 1500 2000 2500 3000
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
MacArthur Boulevard upstream bounding cross-section.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .1 .
0
5
5
.1
0 500 1000 1500 2000 2500 3000
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
MacArthur Blvd
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .1 .
0
5
5
.1
0 500 1000 1500 2000 2500 3000
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
MacArthur Blvd
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.1 .
0
5
5
.1 .1 .1 .1
0 500 1000 1500 2000 2500 3000
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
MacArthur Boulevard downstream bounding cross-section.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.1 .
0
5
5
.1 .1 .1 .1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.1 .
0
5
5
.1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.1 .
0
5
5
.1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .1 .
0
5
5
.1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .1 .
0
5
5
.1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
475
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .1 .
0
5
5
.1
0 200 400 600 800 1000 1200 1400 1600 1800
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .
0
9
.1 .
0
5
5
.1
0 200 400 600 800 1000 1200 1400 1600 1800
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .
1
2
.
0
5
5
.1
0 200 400 600 800 1000 1200 1400 1600 1800
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .
1
2
.1
0 200 400 600 800 1000 1200 1400 1600 1800
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .
0
5
5
.
0
9
.1
0 200 400 600 800 1000 1200 1400 1600 1800
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .
0
9
.
0
5
5
.1
0 200 400 600 800 1000 1200 1400 1600 1800
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .
0
9
.
0
5
5
.1
0 200 400 600 800 1000 1200 1400 1600 1800
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .
0
9
.
0
5
5
.1
0 500 1000 1500 2000
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .
0
9
.
0
5
5
.
0
9
.1
0 500 1000 1500 2000
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .
0
9
.
0
5
5
.09 .1
0 500 1000 1500 2000
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .
0
5
5
.
0
9
.1
0 500 1000 1500 2000
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .
0
9
.
0
5
5
.
0
9
.1
0 500 1000 1500 2000
435
440
445
450
455
460
465
470
475
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
0
9
.
0
5
5
.
0
9
.03 .1
0 500 1000 1500 2000
435
440
445
450
455
460
465
470
475
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.09 .
0
5
5
.
0
9
.03 .1
0 200 400 600 800 1000 1200 1400 1600
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .
0
9
.
0
5
5
.
0
9
.
0
3
.1
0 200 400 600 800 1000 1200 1400 1600 1800
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .
0
9
.
0
5
5
.
0
9
.
0
3
.1
0 200 400 600 800 1000 1200 1400 1600
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .
0
9
.
0
5
5
.
0
9
.1
0 200 400 600 800 1000 1200 1400 1600 1800
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
0
9
.
0
5
5
.
0
9
.03 .1
0 500 1000 1500 2000
435
440
445
450
455
460
465
470
475
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
5
.
0
9
.
0
5
5
.
0
9
.025 .1
0 200 400 600 800 1000 1200 1400 1600 1800
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.045 .
0
9
.
0
5
5
.
0
9
.025 .1
0 500 1000 1500 2000
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.04 .045 .09 .
0
5
5
.
0
9
.03 .025 .1
0 500 1000 1500 2000 2500
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.04 .045 .
0
9
.
0
5
5
.
0
9
.03 .1
0 500 1000 1500 2000 2500 3000
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.04 .045 .
0
9
.
0
5
5
.
0
9
.03 .1
0 500 1000 1500 2000 2500 3000
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.04 .045 .
0
9
.
0
5
5
.
0
9
.
0
3
.1 .03 .1
-500 0 500 1000 1500 2000 2500 3000
435
440
445
450
455
460
465
470
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.04 .
0
4
5
.
0
9
.
0
5
5
.
0
9
.
0
3
.1
0 500 1000 1500 2000 2500 3000 3500
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
.
1
5
.04 .
0
4
5
.
0
9
.
0
5
5
.
0
9
.025 .1
-500 0 500 1000 1500 2000 2500 3000 3500
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
0
4
.15 .04 .
0
4
5
.
0
9
.
0
5
5
.
0
9
.025 .1
0 500 1000 1500 2000 2500 3000 3500
435
440
445
450
455
460
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
DCLID#1 Levee in LOB.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Levee
Ineff
Bank Sta
.
0
3
.
1
5
.04 .15 .04 .
0
4
5
.
0
9
.
0
5
5
.
0
9
.1 .025 .1
0 500 1000 1500 2000 2500 3000 3500
435
440
445
450
455
460
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.15 .04 .
0
5
.
0
9
.
0
5
5
.
0
9
.1 .025 .1
0 500 1000 1500 2000 2500 3000
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 50-year
WS 100-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.04 .
0
5
5
.
0
5
.1
0 500 1000 1500 2000 2500
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 50-year
WS 100-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.04 .09 .
0
5
.
0
5
5
.1
0 500 1000 1500 2000
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 50-year
WS 100-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.04 .
0
4
5
.
1
2
.
0
5
5
.05 .
1
.1
0 200 400 600 800 1000 1200 1400 1600 1800
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 50-year
WS 100-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.08 .
0
4
5
.15 .055 .025 .
1
.1
0 200 400 600 800 1000 1200 1400 1600
425
430
435
440
445
450
455
460
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 50-year
WS 100-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.08 .
0
4
5
.15 .
0
5
5
.
0
7
.025 .1
0 200 400 600 800 1000 1200 1400 1600 1800
425
430
435
440
445
450
455
460
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.08 .
0
4
5
.15 .
0
5
5
.09 .1
0 200 400 600 800 1000 1200 1400 1600
425
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.08 .
0
4
5
.15 .
0
5
5
.1
0 500 1000 1500 2000
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.08 .
0
4
5
.15 .
0
5
5
.1
0 500 1000 1500 2000 2500
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.08 .
0
4
5
.15 .
0
5
5
.1
0 500 1000 1500 2000 2500
430
435
440
445
450
455
460
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.08 .
0
4
5
.15 .
0
5
5
.1
0 500 1000 1500 2000 2500
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .08 .
0
4
5
.15 .
0
5
5
.
1
.1
0 500 1000 1500 2000 2500
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .08 .
0
4
5
.15 .
0
5
5
.09
0 500 1000 1500 2000 2500
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .08 .
0
4
5
.15 .
0
5
5
.09
0 500 1000 1500 2000 2500
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .08 .
0
4
5
.15 .
0
5
5
.09
0 500 1000 1500 2000 2500
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .08 .
0
4
5
.15 .
0
5
5
.09
0 500 1000 1500 2000 2500 3000
425
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .08 .
0
4
5
.15 .
0
5
5
.09 .
1
0 500 1000 1500 2000 2500 3000
425
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .
1
5
.05 .08 .
0
5
5
.09
0 500 1000 1500 2000 2500 3000
425
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .
1
5
.08 .
0
4
5
.15 .
0
5
5
.09
0 500 1000 1500 2000 2500 3000
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .
1
5
.08 .
0
4
5
.15 .
0
5
5
.
1
0 500 1000 1500 2000 2500 3000
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.05 .
1
5
.08 .
0
4
5
.08 .15 .
0
5
5
.1
0 500 1000 1500 2000 2500 3000
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .
1
5
.
0
5
.08 .045 .15 .
0
5
5
.1
0 500 1000 1500 2000 2500 3000
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .15 .08 .045 .15 .
0
5
5
.
1
0 500 1000 1500 2000 2500 3000
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .
1
5
.05 .08 .045 .15 .
0
5
5
.
1
0 500 1000 1500 2000 2500
425
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .
1
5
.05 .08 .045 .15 .
0
5
5
.1
0 500 1000 1500 2000 2500
430
435
440
445
450
455
460
465
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Lateral weir defined in LOB along Gun Club Road.
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.
1
5
.05 .15 .045 .15 .
0
5
5
.
1
5
.
1
0 200 400 600 800 1000 1200 1400 1600
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .045 .
0
5
5
.15 .
1
0 200 400 600 800 1000 1200 1400
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.
0
4
5
.15 .
0
4
5
.
1
5
.
0
5
5
.15 .1
0 200 400 600 800 1000 1200 1400
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
4
5
.
1
5
.
0
5
5
.15 .1
0 200 400 600 800 1000 1200
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
4
5
.15 .
0
5
5
.15 .1
0 200 400 600 800 1000 1200
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.
0
4
5
.15 .
0
4
5
.15 .
0
5
5
.
0
5
5
.
1
5
.
1
0 200 400 600 800 1000 1200 1400
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.
0
4
5
.15 .
0
4
5
.15 .
0
5
5
.15 .
1
0 200 400 600 800 1000 1200 1400
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.045 .15 .
0
4
5
.
1
5
.
0
5
5
.15 .1
0 200 400 600 800 1000 1200 1400
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.045 .15 .
0
4
5
.15 .
0
5
5
.15 .1
0 200 400 600 800 1000 1200 1400
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.
0
4
5
.15 .
0
4
5
.15 .
0
5
5
.08
0 200 400 600 800 1000 1200 1400
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.045 .15 .
0
5
5
.1
0 200 400 600 800 1000 1200 1400 1600
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.
0
4
5
.15 .
0
5
5
.15 .1
0 200 400 600 800 1000 1200 1400 1600
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.
0
4
5
.15 .
0
5
5
.
0
5
5
.1
0 200 400 600 800 1000 1200 1400 1600
420
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
5
5
.
1
5
.1
0 200 400 600 800 1000 1200 1400 1600
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
5
5
.15
0 200 400 600 800 1000 1200 1400 1600 1800
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
5
5
.12 .
1
0 500 1000 1500 2000
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
5
5
.12 .1
0 200 400 600 800 1000 1200 1400 1600
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
5
5
.12 .045
0 200 400 600 800 1000 1200 1400 1600
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
5
5
.12 .045
0 200 400 600 800 1000 1200 1400 1600 1800
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.
0
4
5
.15 .
0
5
5
.12 .045
0 200 400 600 800 1000 1200 1400 1600 1800
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.
0
4
5
.15 .
0
5
5
.
1
2
.045
0 200 400 600 800 1000 1200 1400 1600
420
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .055 .12 .045
0 200 400 600 800 1000 1200 1400 1600
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .06 .
1
2
.045
0 200 400 600 800 1000 1200 1400
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.
1
5
.
0
4
5
.
1
5
.06 .
1
2
.12 .045
0 200 400 600 800 1000 1200 1400
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.
0
4
5
.15 .12 .12 .045
0 200 400 600 800 1000 1200
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.045 .15 .06 .12 .045
0 200 400 600 800 1000 1200 1400 1600
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.045 .06 .12 .045
0 200 400 600 800 1000 1200
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.045 .06 .12 .045
0 200 400 600 800
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .06 .
1
2
.045
0 100 200 300 400 500 600 700
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .06 .
1
2
.045 .
1
2
0 100 200 300 400 500 600
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .06 .12 .09
0 100 200 300 400 500 600
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .06 .1
0 100 200 300 400 500 600
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .05 .06 .045
0 200 400 600 800 1000 1200 1400
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.05 .
0
6
.
0
5
.045
0 200 400 600 800 1000 1200 1400 1600
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Water Line Crossing
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .05 .05 .
0
9
.06 .045
0 200 400 600 800 1000 1200 1400 1600
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.05 .05 .05 .
0
9
.06 .045
0 200 400 600 800 1000 1200 1400
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.045 .045 .
0
4
5
.15 .
0
5
5
.045
0 200 400 600 800 1000 1200 1400
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.045 .045 .
0
4
5
.15 .
0
5
5
.045
0 200 400 600 800 1000 1200 1400 1600
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.045 .15 .
0
5
5
.045
0 200 400 600 800 1000 1200 1400 1600 1800
425
430
435
440
445
450
455
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.045 .15 .
0
5
5
.
0
1
.1
0 200 400 600 800 1000 1200 1400 1600 1800
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.045 .15 .
0
5
5
.045
0 500 1000 1500 2000
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Ineff
Bank Sta
.045 .15 .
0
5
5
.045
0 500 1000 1500 2000
420
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.045 .15 .
0
5
5
.045
0 500 1000 1500 2000
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.045 .15 .
0
5
5
.045 .09
0 200 400 600 800 1000 1200 1400 1600 1800
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.045 .15 .055 .045 .
0
9
0 200 400 600 800 1000 1200 1400 1600
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.
0
4
5
.15 .
0
5
5
.045 .09
0 200 400 600 800 1000 1200 1400
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
5
5
.045
0 200 400 600 800 1000 1200 1400
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
5
5
.045
0 200 400 600 800 1000 1200
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
5
5
.
0
4
5
.04
0 200 400 600 800 1000
420
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
5
5
.12 .045
0 200 400 600 800 1000
420
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
5
5
.045
0 200 400 600 800 1000
420
425
430
435
440
445
450
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
5
5
.045
0 200 400 600 800 1000
425
430
435
440
445
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
5
5
.045
0 200 400 600 800 1000 1200
425
430
435
440
445
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
5
5
.045
0 200 400 600 800 1000 1200
425
430
435
440
445
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
5
5
.045
0 200 400 600 800 1000 1200
426
428
430
432
434
436
438
440
442
444
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .
0
5
5
.045
0 200 400 600 800
425
430
435
440
445
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .055 .045
0 200 400 600 800 1000
420
425
430
435
440
445
Denton Creek Drainage Study Plan: Denton Creek Multiyear 10/16/2017
Station (ft)Elevation (ft)Legend
WS NEW 500-year
WS OLD 500-year
WS 100-year
WS 50-year
WS 25-year
WS 10-year
WS 5-year
WS 2-year
Ground
Bank Sta
.15 .055 .045
APPENDIX F: HYDROLOGIC PARAMETER CALCULATIONS
SUB_NAME PCT_IMP PCT_URB
DCLID_0010 6.7 11.6
DCLID_0020 60.3 67.4
DCLID_0030 39.9 55.1
DCLID_0040 38.7 50.7
DCLID_0050 67.3 91.4
DCLID_0060 70.1 77.9
DCLID_0070 71.6 83.1
DCLID_0080 81.2 88.5
DCLID_0090 87.6 94.4
DCLID_0100 75.2 80.7
DCLID_0110 7.9 8.3
DCLID_0120 43 69.9
DCLID_0130 80.9 85.4
DCLID_0140 26.2 33.3
DCLID_0150 68.5 82.4
DCLID_0160 55.3 64.6
DCLID_0170 85 92.3
DCLID_0180 45.5 81.8
DCLID_0190 60.2 71
DCLID_0200 77.5 91.5
DCLID_0210 23 44
DCLID_0230 68.5 87.1
DCLID_0240 37.2 63.4
DCLID_0250 59.5 80.6
DCLID_0260 67.9 82.6
DCLID_0270 47.4 71
DCLID_0280 45.3 75.4
DCLID_0290 64.8 82.3
DCLID_0300 31 49.8
Percent Impervious and Urban
Halff USACE Halff %Sand %Clay Area
SUB_NAME Subbasin DA_Area
DCLID_0010 1 7844677.533 47 53 0.28139
DCLID_0020 2 35857485.37 46 54 1.28621
DCLID_0030 3 2113021.486 39 61 0.07579
DCLID_0040 4 22618927.22 52 48 0.81134
DCLID_0050 5 648813.1202 39 61 0.02327
DCLID_0060 6 33932875.49 47 53 1.21717
DCLID_0070 7 28502728.77 48 52 1.02239
DCLID_0080 8 14051240.15 55 45 0.50402
DCLID_0100 9 4386581.908 55 45 0.15735
DCLID_0090 10 2141222.759 42 58 0.07681
DCLID_0110 11 331404.7442 31 69 0.01189
DCLID_0120 12 84315281.86 52 48 3.02439
DCLID_0130 13 3569636.8 50 50 0.12804
DCLID_0140 14 1265220.088 34 66 0.04538
DCLID_0150 15 25907222.75 51 49 0.92929
DCLID_0160 16 6939173.69 52 48 0.24891
DCLID_0170 17 9341457.252 68 32 0.33508
DCLID_0180 18 2773169.772 58 42 0.09947
DCLID_0190 19 6223986.727 64 36 0.22325
DCLID_0200 20 17416182.06 58 42 0.62472
DCLID_0210 21 1182178.361 32 68 0.0424
DCLID_0230 23 21259594.01 59 41 0.76258
DCLID_0240 24 11200563.01 46 54 0.40176
DCLID_0250 25 11590139.87 49 51 0.41574
DCLID_0260 26 170323756.7 40 60 6.10952
DCLID_0280 27 37247410.57 50 50 1.33607
DCLID_0270 28 11782610.06 45 55 0.42264
DCLID_0290 29 46835080.46 44 56 1.67998
DCLID_0300 30 87112435.41 39 61 3.12473
DA Size Curve L LCAL LCAStsLCAL/(Sst)0.5%CLAY %SAND PCT_Urb tp (clay) tp (sand) tptpDA Name HMS Basin(mi2)Number (ft) (ft) (miles) (miles) (ft/mile) (%) (%) (hours) (hours) (hours) (minutes)DCLID_0010 Lower Denton Creek 0.00000 6142.47 2280.851.16 0.43 101.40 0.0499 53.00 47.00 11.60 0.27 0.52 0.39 23.47DCLID_0020Lower Denton Creek0.0000012798.096019.782.42 1.14 71.36 0.3271 54.00 46.00 67.40 0.40 0.76 0.57 34.06DCLID_0030Lower Denton Creek0.000002223.131053.040.42 0.20 290.07 0.0049 61.00 39.00 55.10 0.09 0.16 0.12 7.03DCLID_0040Lower Denton Creek0.0000015371.457609.372.91 1.44 59.39 0.5444 48.00 52.00 50.70 0.54 1.03 0.79 47.62DCLID_0050Lower Denton Creek0.000002296.46944.100.43 0.18 254.08 0.0049 61.00 39.00 91.40 0.07 0.13 0.10 6.00DCLID_0060Lower Denton Creek0.0000017424.7910385.103.30 1.97 54.92 0.8759 53.00 47.00 77.90 0.55 1.04 0.78 46.88DCLID_0070Lower Denton Creek0.0000014328.486018.582.71 1.14 53.85 0.4215 52.00 48.00 83.10 0.40 0.76 0.58 34.53DCLID_0080Lower Denton Creek0.000008398.663878.741.59 0.73 55.28 0.1572 45.00 55.00 88.50 0.27 0.51 0.40 23.90DCLID_0090Lower Denton Creek0.000003321.64751.120.63 0.14 16.85 0.0218 58.00 42.00 94.40 0.12 0.23 0.17 9.96DCLID_0100Lower Denton Creek0.000003299.08580.120.62 0.11 82.01 0.0076 45.00 55.00 80.70 0.09 0.17 0.13 7.84DCLID_0110Lower Denton Creek0.000001756.27737.690.33 0.14 0.80 0.0519 69.00 31.00 8.30 0.28 0.54 0.36 21.84DCLID_0120Lower Denton Creek0.0000027552.8613121.905.22 2.49 35.46 2.1777 48.00 52.00 69.90 0.82 1.55 1.20 72.02DCLID_0130Lower Denton Creek0.000005331.051490.931.01 0.28 102.15 0.0282 50.00 50.00 85.40 0.14 0.27 0.20 12.23DCLID_0140Lower Denton Creek0.000002193.131005.410.42 0.19 138.10 0.0067 66.00 34.00 33.30 0.11 0.21 0.15 8.75DCLID_0150Lower Denton Creek0.000009695.154912.551.84 0.93 69.54 0.2049 49.00 51.00 82.40 0.31 0.58 0.45 26.80DCLID_0160Lower Denton Creek0.000005359.532215.501.02 0.42 55.89 0.0570 48.00 52.00 64.60 0.21 0.40 0.31 18.41DCLID_0170Lower Denton Creek0.000006657.172884.091.26 0.55 25.12 0.1374 32.00 68.00 92.30 0.25 0.47 0.40 23.92DCLID_0180Lower Denton Creek0.000002036.30409.600.39 0.08 102.16 0.0030 42.00 58.00 81.80 0.06 0.12 0.10 6.00DCLID_0190Lower Denton Creek0.000005937.242519.911.12 0.48 58.37 0.0702 36.00 64.00 71.00 0.22 0.41 0.34 20.60DCLID_0200Lower Denton Creek0.000009271.095066.751.76 0.96 68.69 0.2033 42.00 58.00 91.50 0.29 0.55 0.44 26.36LAG TIME
APPENDIX G: DIGITAL DATA