ST9301-CS 950822Coppell, Texas 75019
August 22, 1995
(Letters mailed to attached list)
P.O. Box 478
Coppell, Texas 75019
214-462-0022
NOTICE OF INTENT TO PROCESS
CDC APPLICATION TRACKING CODE CDC 95-01 COP
Dear Mr.:
Enclosed please find Corridor Development Permit information for the proposed development
activity within the Trinity River Corridor of the City of Coppell.
Please review and comment on the information provided within thirty days of receipt of this
correspondence in adherence to the Corridor Development Certificate manual and process.
A large part of the backup information was previously provided by the City of Dallas under their
Corridor Development Certificate Number CDC 95-01. The backup information was entitled
"June 1994 Sandy Lake Road Bridge Hydraulic Study" by Halff Associates, Inc. This Notice
of Intent is basically the same as was submitted by the City of Dallas, however, because a
portion of the project is within the City of Coppell we are also processing a CDC for the City
of Coppell.
If you should have any questions regarding the information provided please feel free to contact
me at (214)304-3679. Thank you for your cooperation and continued participation in this
regional effort to protect the Trinity River Corridor.
Sincerely, /~.
IC eth M. qriffifi, P.E.
A~istant git.v.~Manager/City Engineer
List saved in file/pcrocker/cdc/cdc2.1st)
Floodplain/CDC Administrator
Jerry Ewen P.E., Asst. Dir. of Comm. Development
City of Arlington
P.O. Box 231
Arlington, Texas 76010
Dear Mr. Ewen:
Floodplain/CDC Administrator
Tim Tumulty P.E., City Engineer
City of Carrollton
P.O. Box 110535
Carrollton, Texas 75011-0535
Dear Mr. Tumulty:
Floodplain/CDC Administrator
David Dybala P.E., Acting Asst. Dir. of Public Works
City of Dallas
320 E. Jefferson Blvd. Suite #321
Dallas, Texas 75203
Dear Mr. Dybala:
Floodplain/CDC Administrator
Jerome V. Murawski Jr., P.E., City Engineer
City of Farmers Branch
P.O. Box 819010
Farmers Branch, Texas 75381-9010
Dear Mr. Murawski:
Floodplain/CDC Administrator
Rick Trice P.E., Manager, Engineering Services
City of Fort Worth
1000 Throckmorton
Fort Worth, Texas 76102
Dear Mr. Trice:
Floodplain/CDC Administrator
Jack Angel P.E., Director of Public Works
City of Irving
P.O. Box 15228
Irving, Texas 75015-2288
Dear Mr. Angel:
Floodplain/CDC Administrator
Lynn Hilbum, P.E.
City of Grand Prairie
P.O. Box 530011
Grand Prairie, Texas 75053-0011
Dear Mr. Hilburn:
Floodplain/CDC Administrator
T.S. Kumar P.E., Asst. City Engineer
City of Lewisville
151 West Church Street
Lewisville, Texas 75063
Dear Mr. Kumar:
Floodplain/CDC Administrator
Abel V. Saldana P.E., Project Engineer
Dallas County
411 Elm
Dallas, Texas 75202
Dear Mr. Saldana:
Floodplain/CDC Administrator
Dir. of Public Works
Denton County
110 West Hickory
Denton, Texas 76201
Dear ~
Floodplain/CDC Administrator
James Bennett P.E., County Engineer
Tarrant County
Tarrant County Administration Building
100 East Weatherford
Fort Worth, Texas 76196
Dear Mr. Bennett:
Executive Services Manager Re: CDC
Sam Scott
Trinity River Authority
P.O. Box 60
Arlington, TX 76010
Dear Mr. Scott:
U.S. Army Corps of Engineers
Paul Rodman P.E., Chief of Hydrology
Fort Worth District - Hydrology Section
CESWF-ED-HH
P.O. Box 17300
819 Taylor Street
Fort Worth, Texas 76102
Dear Mr. Rodman:
U.S. Army Corps of Engineers
Presley Hatcher
Fort Worth District - Regulatory Branch
CESWF-OD-R
P.O. Box 17300
819 Taylor Street
Fort Worth, Texas 76102-0300
Dear Mr. Hatcher:
Federal Emergency Management Agency
Region VI
David Passey
800 North Loop 288
Denton, Texas 76210-3698
Dear Mr. Passey:
Texas Natural Resource Conservation Commission
James Mirabal, P.E.
Floodplain Management Programs Section
P.O. Box 13087
Capitol Station
Austin, Texas 78711-3087
Dear Mr. Mirabal:
North Central Texas Council of Governments
Chris Brooks P.E., Manager of Engineering Services
Environmental Resources Dept.
CDC Coordinator
P.O. Box 5888
Arlington, Texas 76005-5888
Dear Mr. Brooks:
Corridor Development Certificate
August 1991
General. This application should be completed according to the guidelines set forth in the Corridor Development Certificate Manual. Information provided by the
Applicant herein will be used by the City/County to evaluate this Trinity River Corridor Development Certificate (CDC). This application is public information and
will be used by other relevant flood plain regulatory authorities, i.e., U.S. Army Corps of Engineers (COE); Federal Emergency Management Agency (FEMA); and
the Texas Water Commission (TWC). These and other regulatory agencies may require additional information. If additional space is needed to complete this application,
please attach a separate sheet labeled appropriately.
Distribution. If a Notice of Intent to Process is granted, this data shall be distributed to the following agencies: COE, FEMA, TWC; the North Central Texas Council
of Governments (NCTCOG); the cities of Arlington, Carrollton, Coppell, Dallas, Farmers Branch, Fort Worth, Grand Prairie, Irving, and Lewisville; the counties of
· Dallas, Denton and Tarrant; the Tarrant County Water Control and Improvement District Number One, and the Trinity River Authority.
Applicant's Representative. (identify person knowledgeable of and authorized to respond to questions concerning data provided by the Applicant)
Name: Walter E. Skipwith~ P.E.t Halff Associates~ Inc.
Address: 8616 Northwest Plaza Driver Dallas~ Texas 75225
Relationship to Applicant: Consulting Engineer
Telephone: (214) 739-0094
(PLEASE TYPE)
Standard CDC Form - Part 1
Section A -- CDC Application
(To be filled out by Applicant)
1. CDC Applicant:
Property Owner:
Project Name:
NCTCOG Map Grid:
City of Coppell
Cities of Dallas~ Carrellton~ Coppell
Sandy Lake Road
City/County: Carrellton~ Dallas~ Coppell/Dallas County
Engineer: Halff Associates~ Inc.
Project Size: (total acres)= Sandy Lake Rd. embankment 30 acres
Mcinnish Park (swale/pond) 35 acres
2. Location:
a. Provide general description of location, including MAPSCO location, street address, and identified impacted water bodies:
Mapsco page lB and 2~ 1800 thru 2300 blocks of Sandy Lake Road? Cities of CarroHton~ Coppel~ and Dallas. Impacted water
Body: Elm Fork - Tdnit~ River.
b.i. Part or all of project is within the CDC REGULATORY ZONE. [] Yes [] No
b.ii. Part or all of projoct is within the CDC REVIEW ZONE. [] Yes [] No
If the answer to both of these questions is negative, NO CDC PERMIT is required.
3. Proposed Activity: (check appropriate categories)
[] dredge/channel modification [] swale constxuction [] fill [] levee I~ other (attach explanation)
for road embankment
4. Proposed Use: (check appropriate categories)
[] private single dwelling(s) [] private multi-dwelling(s) [] public [] commercial
[] other (explain) Fill for road embankment with compensating swale excavation
[] industrial
5. Applicant requests a variance to common permit criteria.
(Please attach supporting material)
[] Yes [] No
Application is hereby made for a Corridor Development Ce~ificatc (CDC). I certify that I am familiar with thc information contained in this application, and that to
the best of my knowledge and belief, this information is Ixue, complete, and accurate.
/5' 22. q$
oppell Date
CDC Part 1 - Continued
Section B -- Notice of Intent to Process by City/County
(To be filled out by CDC/Floodplain Administrator)
1. CDC Number: ~ Local Contact Pcrsonr:.~- ~ ·
City/Ommm~ of: Telephone Numbe
2. Exempt Category: (check if applicable - additional documentation may be required)
[] maintenance/repair of flood control structures [] bank stabilization activities
[] outfall/intake slmcture permitted under NPDES program [] project is completely outside the CDC Regulatory Zone
[] discharge of matefiai for backfill or bedding for utility lines
with no change to bottom contours
3. Required State/Federal Review:
a. FEMA Conditional Letter of Map Revision (CLOMR) [] Yes [] No
b. COE Permit required [] Yes [] No
c. TWC Plan of Reclamation required [] Yes [] No
4. COE Hydrologic/Hydraulic technical review completed. (check one) [] Yes (attached) [] No (explain)
5. Administrative Findings: (comments/conditions) COE found that the project met the criteria set forth in the Corridor Development Certificate Manual (letter attached).
6. City Action if Variance is requested. [] granted [] denied
7. Notice of Intent: (check one) ~ssuod [] denied [] not applicable (CDC not required)
By my authority under the City/County, I hereby issue and record the City/County's findings. This No6ce of Intent to Process in no way implies that final project will
be granted by the City/County.
,'K,.,. ta.zz-
Section C -- CDC Action/Findings
(To be filled out by CDC/Floodplain Administrator)
1. Listing of Commentaries: (written comments on this application were received from:),
2. Summary of Other Permitting Actions:
COE Project No:
(comments:)
Permit Type: [] issued [] issued w/conditions [] denied [] no permit required
FEMA Comments:
TWC Comments:
3. CDC Action: (check one) [] granted [] granted w/conditions [] denied
4. Operation and Maintenance Agreement: [] executed (attach copy) [] not applicable Date/Initials:
5. The CDC will cease to be in effect: [] five years after the date of issuance if no development activities are undertaken
[] DATE:
6. Final Findings of Fact: (summary of City/County's findings/comments/conditions)
By my authority under the City/County, I hereby issue the City/County's findings and final action.
Signature of CDC/Floodplain Administrator/Typed Nme/Title
Date
PROJECT: Sandy Lake Road
RIVER: Elm Fork - Trinity River
CDC APPLICANT: ~ .~...,~
CEX~ NUIV[BER: - {/ -
Standard CDC Form - Part 2
Detailed Hydrologic/Hydraulic Information
General. CDC Applicants are requested to provide the following detailed hydrologic and hydraulic information for ail proposed projects within the CDC Regulatory
Zone of the Trinity River Corridor. This form and the data provided by the Applicant herein is a required supplement to the Part 1, Corridor Development Certificate
(CDC) Application. However, in certain cases the City/County may release the Applicant from completing all or portions of this form if the proposed project satisfies
specific provisions. The Applicant is encouraged to schedule a pre-application meeting with the City/County if there are any questions regarding the requirements of
the City/County. This application is considered public information and will he distributed to affected Federal, State, and local governmental agencies. Please he as
complete and concise as possible.
(To he fdled out by Applicant)
1. Site Plan.
(a) Please attach a location map (8 1/2 x 11). Plans a~¢hed: []Yes ONo
Co) Please attach a general site plan (8 1/2 x l 1). Plans attached: [] Yes [] No
(c) Please attach a detailed site plan (see CDC Manual). [] Yes [] No
See Appendix C
2. Hydrologic/Hydraulic Information. Please provide the following data to characterize the hydrologic and hydraulic impacts of thc proposed project:
- 100 YEAR FLOOD EVENT - *
Hydrologic/Hydraulic Impact (measure) Pre-Project Post-Project Change
Discharges: Upstream Boundary: 99420 55000 cfs. N/A N/A
Downstream Boundary: 88160 55000 els. N/A N/A
Channel Velocities: Upstream Boundary: 99420 2.29 fps. 2.51 fps. +0.22 fps.
Downstream Boundary: 88160 9.07 fps. 9.07 fps. 0.00 fps.
Water Surface Elevation (NVGD): Upstream Boundary: 99420 448.35 fi. 448.13 fi. -0.22 fi.
Downstream Boundary: 88160 441.71 fi. 441.71 fi. 0.00 fi.
Project Lands in Floodplain:' 1765 ac. 1742 ac. -23 ac.
Valley Storage on Project Lands:2 ac-fi, ac-fi, ac-fi.
-SPF FLOOD EVENT - *
Hydrologic/Hydraulic Impact (measure) Pre-Project Post-Project Change
Discharges: Upstream Boundary: 99420 100,000 cfs. N/A N/A
Downstream Boundary: 88160 100,000 cfs. N/A N/A
Channel Velocities: Upstream Boundary: 99420 2.60 fps. 2.58 fps. -0.02 fps.
Downstream Boundary: 88160 9.09 fps. 9.09 fps. 0.00 fps.
Water Surface Elevation (NVGD): Upstream Boundary: 99420 452.29 fi. 452.35 fi. +0.06 fi.
Downstream Boundary: 88160 448.60 fi. 448.60 ft. 0.00 ft.
Project Lands in Floodplain:~ 2360 ac. 2350 ac. -10 ac.
Valley Storage on Project Lands:2 ac-fi, ac-fi, ac-fi.
* See Section IV of this report for Water Surface Elevation Comparisons
i Sandy Lake Road Embankment only used for comparison. Acreage based on flood plain from Section 88160 upstream of Belt Line Road through Section 99420.
2 See Attachment for description of valley storage calculation procedure.
?I { - I
CDC PART 2 - CONTINUED
Flood Storage/Hydraulic Mitigation. Please identify all flood storage and other hydrologic/hydrauiic mitigation a~as on the site plan, and describe them in the
space below.
The Flood Storage/Hydraulic mitigation includes a Linear swale~ approximately 3600 feet long and a shallow excavated area near Belt Line Road.
The proposed bridge is I(M0 feet long spanning the main channel and a portion of the left overbank.
Habitat/Wetiand Mitigation. Please identify all habitat and/or land resource area used for environmental mitigation purposes on the site plan, and describe them
in the space below:
This pro,iect has been submitted to the COE for confirmation of the Wetlands Determination (see Appendix A).
5. Operation and Maintenance. The operation and maintenance of flood water conveyance systems, conveyance alterations, storm water control structures, equipment
and appurtenances, and water quality control measures will become the obligation of: (check one)
I~ City Cl County ~ Owner [] other (specffy):Swale - City of Carrollton Parks Department; Bridge - City of Dallas
The annualized cost, including replacement costs, of operating and maintaining post-project storm water control systems, conveyance alterations, and water quality
control measures is estimated to be in current year dollars: ($/yr) N/A
6. Erosion Control Information. Please provide the following data on site erosion control and water quality protection practices.
(1) Construction Controls: (describe construction control strategies intended for site erosion control)
A erosion control plan will be included in the construction plans.
(2) Post Construction Controls: (describe permanent control strategies intended for erosion control and water quality protection after project completion)
Concrete Slope paving under the bridge; rip-rap in areas with velocities > 5 fps; Grass in all other areas.
7. Land Cover Information. Please provide the following data, in total acres, to characterize the impacts on current land cover which will result from construction
of the proposed project:
- LAND COVER INFORMATION -
Values in TOTAL ACRES
Land Use/Land Cover Classification** Pre-Project Post-Project
100 urban/built-up 216.08 ac 225.28 ac
200 agricultural/pasture (park) 160.14 ac 135.95 ac
300 rangeland/shrub & brush (other) 336.06 ac 328.82 ac
400 forest/woodlands 65.05 ac 63.93 ac
500 water (identify on site plan) 206.99 ac 231.09 ac
600 wetland (identify on site plan) (modified only)* 0.81 ac ' 0.06 ac *
700 barren land/mines & quarries (landfill) 116.87 ac 116.8/ac
**Note: Listed land cover types are "Level 1" categories (100 thru 700) defined in accordance with the land use and land cover classification of the U.S. Geological
Survey, U.S. Department of the Interior. This data may be required by the U.S. Army Corps of Engineers and other regulatory agencies.
* Includes existing wetlands modified by project (see Appendix A)
To the best of my knowledge, the d[~"' la[ a,~ _
information in Part 2 is complete and accurate: ~
Coppell
Date
As~ C'l'ey Hanager/City Engineer
REPLY TO
ATTENTION OF:
DEPARTMENT OF THE ARMY
FORT WORTH DISTRICT, CORPS OF ENGINEERS
P.O. BOX 17300
FORT WORTH. TEXAS 76102-0300
May 16, 1995
Hydrology and Hydraulics Section
civil Design Branch
RECEIVED
1 8 !995
Halff Associates, inc
Ms. Sophia Iliadou, P.E.
Department of Public Works
Oak Cliff Municipal Center
320 E. Jefferson Boulevard
Dallas, Texas 75203
Dear Ms. Iliadou:
The Corps of Engineers has completed the hydrologic and
hydraulic review of the Sandy Lake Road Bridge Hydraulic Study,
as prepared by Halff Associates, Inc., for adherence to the
Corridor Development Certificate criteria.
The project as represented meets the criteria set forth in
the Corridor Development Certificate manual.
The point of contact regarding the hydrologic and hydraulic
review is Mr. Michael Danella at (817) 334-2817.
Sincerely,
Jimmy D. Baggett, P.E.
chief, civil Design Branch
Copies Furnished:
Chris Brooks
North Central Texas Council of Governments
Post Office Box 5888
Arlington, Texas 76005-5888
~"Walter Skipwith
Halff Associates, Inc.
8616 Northwest Plaza
Dallas, Texas 75225
Wayne Lea CESWF-OD-R
Corridor Development Certificate
Elm Fork - Trinity River
Sandy Lake Road Hydraulic Study
Valley Storage Comparison
The Elm Fork flood plain is partially urbanized through the reach from Belt Line through
Sandy Lake Roads. For existing conditions, flow is restricted to four main passages: two routes
within the east overbank, the main channel and the left overbank. Non-effective flow areas were
modelled utilizing ET cards for encroachments and GR cards to block out non-effective flow
within the flood plain. These non-effective flow areas are not included in the water surface
elevation calculations, however, should be included for valley storage computations. For
proposed conditions the flow area is confined to west of the City of Carrollton landfill. Since
a hydraulic model reflecting the full area for valley storage computations is not available, Halff
Associates prepared an earthwork model reflecting cut and fill for the Sandy Lake Road
embankment and the proposed swale excavation. These quantities are shown in the table below.
Sandy Lake Road Bridge Hydraulic Study
Valley Storage Comparisons
Description I I 100-Year I SPF
Sandy Lake Road Fill 110,261 cy 184,755 cy
Embankment
Swale Excavation to Cut 317,011 cy 317,011 cy
Normal Pool 430.0