Appendix DFEMA Form 81-107 Payment Information Form
FEDERAL EMERGENCY MANAGEMENT AGENCY
PAYMENT INFORMATION FORM
Community Name:
Project Identifier:
THIS FORM MUST BE MAILED, ALONG WITH THE APPROPRIATE FEE, TO THE ADDRESS BELOW OR FAXED TO THE FAX NUMBER
BELOW.
Please make check or money order payable to the National Flood Insurance Program.
Type of Request:
MT-1 application
MT-2 application
EDR application
Request No. (if known): _______________ Check No.: _______________ Amount:
INITIAL FEE* FINAL FEE FEE BALANCE** MASTER CARD VISA CHECK MONEY ORDER
*Note: Check only for EDR and/or Alluvial Fan requests (as appropriate).
**Note: Check only if submitting a corrected fee for an ongoing request.
COMPLETE THIS SECTION ONLY IF PAYING BY CREDIT CARD
CARD NUMBER EXP. DATE
— — — —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Month Year
_________________________________________________________________
Date Signature
NAME (AS IT APPEARS ON CARD):
(please print or type)
ADDRESS:
(for your
credit card
receipt-please
print or type)
DAYTIME PHONE:
LOMC Clearinghouse
847 South Pickett Street
Alexandria, VA 22304-4605
Attn.: LOMC Manager
FEMA Project Library
847 South Pickett Street
Alexandria, VA 22304-4605
FAX (703) 212-4090
FEMA Form 086-0-27, (2/2011) Previously FEMA Form 81-89 MT-2 Form 1 Page 1 of 3
U.S. DEPARTMENT OF HOMELAND SECURITY
FEDERAL EMERGENCY MANAGEMENT AGENCY
OVERVIEW & CONCURRENCE FORM
O.M.B No. 1660-0016
Expires February 28, 2014
PAPERWORK BURDEN DISCLOSURE NOTICE
Public reporting burden for this form is estimated to average 1 hours per response. The burden estimate includes the time for reviewing instructions,
searching existing data sources, gathering and maintaining the needed data, and completing, reviewing, and submitting the form. You are not required
to respond to this collection of information unless it displays a valid OMB control number. Send comments regarding the accuracy of the burden
estimate and any suggestions for reducing this burden to: Information Collections Management, Department of Homeland Security , Federal Emergency
Management Agency, 1800 South Bell Street, Arlington, VA 20958-3005, Paperwork Reduction Project (1660-0016). Submission of the form is required
to obtain or retain benefits under the National Flood Insurance Program. Please do not send your completed survey to the above address.
PRIVACY ACT STATEMENT
AUTHORITY: The National Flood Insurance Act of 1968, Public Law 90-448, as amended by the Flood Disaster Protection Act of 1973, Public Law 93-
234.
PRINCIPAL PURPOSE(S): This information is being collected for the purpose of determining an applicant's eligibility to request changes to National
Flood Insurance Program (NFIP) Flood Insurance Rate Maps (FIRM).
ROUTINE USE(S): The information on this form may be disclosed as generally permitted under 5 U.S.C § 552a(b) of the Privacy Act of 1974, as
amended. This includes using this information as necessary and authorized by the routine uses published in DHS/FEMA/NFIP/LOMA -1 National Flood
Insurance Program (NFIP); Letter of Map Amendment (LOMA) February 15, 2006, 71 FR 7990.
DISCLOSURE: The disclosure of information on this form is voluntary; however, failure to provide the information requested may delay or p revent
FEMA from processing a determination regarding a requested change to a (NFIP) Flood Insurance Rate Maps (FIRM).
A. REQUESTED RESPONSE FROM DHS-FEMA
This request is for a (check one):
CLOMR: A letter from DHS-FEMA commenting on whether a proposed project, if built as proposed, would justify a map revision, or
proposed hydrology changes (See 44 CFR Ch. 1, Parts 60, 65 & 72).
LOMR: A letter from DHS-FEMA officially revising the current NFIP map to show the changes to floodplains, regulatory floodway or flood
elevations. (See 44 CFR Ch. 1, Parts 60, 65 & 72)
B. OVERVIEW
1.The NFIP map panel(s) affected for all impacted communities is (are):
Community No. Community Name State Map No. Panel No. Effective Date
Example: 480301
480287
City of Katy
Harris County
TX
TX
48473C
48201C
0005D
0220G
02/08/83
09/28/90
480170 City of Coppell TX 48113C 0010L N/A (Prelim)
2. a. Flooding Source: Cottonwood Branch
b. Types of Flooding: Riverine Coastal Shallow Flooding (e.g., Zones AO and AH)
Alluvial fan Lakes Other (Attach Description)
3.Project Name/Identifier: Sandy Lake & Freeport LOMR
4.FEMA zone designations affected: AE , X500 (choices: A, AH, AO, A1-A30, A99, AE, AR, V, V1-V30, VE, B, C, D, X)
5.Basis for Request and Type of Revision:
a.The basis for this revision request is (check all that apply)
Physical Change Improved Methodology/Data Regulatory Floodway Revision Base Map Changes
Coastal Analysis Hydraulic Analysis Hydrologic Analysis Corrections
Weir-Dam Changes Levee Certification Alluvial Fan Analysis Natural Changes
New Topographic Data Other (Attach Description)
Note: A photograph and narrative description of the area of concern is not required, but is very helpful during review.
FEMA Form 086-0-27, (2/2011) Previously FEMA Form 81-89 MT-2 Form 1 Page 2 of 3
b.The area of revision encompasses the following structures (check all that apply)
Structures: Channelization Levee/Floodwall Bridge/Culvert
Dam Fill Other (Attach Description)
6. Documentation of ESA compliance is submitted (required to initiate CLOMR review). Please refer to the instructions for more information.
C. REVIEW FEE
Has the review fee for the appropriate request category been included? Yes Fee amount: $8,250
No, Attach Explanation
Please see the DHS-FEMA Web site at http://www.fema.gov/plan/prevent/fhm/frm_fees.shtm for Fee Amounts and Exemptions.
D. SIGNATURE
All documents submitted in support of this request are correct to the best of my knowledge. I understand that any false stat ement may be punishable by
fine or imprisonment under Title 18 of the United States Code, Section 1001.
Name: Mr. Niraj A. Acharya, P.E., CFM Company: TNP, Inc.
Mailing Address:
TNP
5237 N Riverside Drive, Suite 100
Fort Worth, TX 761347
Daytime Telephone No.: 817.336.5773 Fax No.: 817.336.2813
E-Mail Address: nacharya@tnpinc.com
Signature of Requester (required): Date:
As the community official responsible for floodplain management, I hereby acknowledge that we have received and reviewed this Letter of Map Revision
(LOMR) or conditional LOMR request. Based upon the community's review, we find the completed or proposed project meets or is designed to meet all
of the community floodplain management requirements, including the requirements for when fill is placed in the regulatory flo odway, and that all
necessary Federal, State, and local permits have been, or in the case of a conditional LOMR, will be obtained. For Conditional LOMR requests, the
applicant has documented Endangered Species Act (ESA) compliance to FEMA prior to FEMA’s review of the Conditional LOMR application. For
LOMR requests, I acknowledge that compliance with Sections 9 and 10 of the ESA has been achieved independently of FEMA’s process. For actions
authorized, funded, or being carried out by Federal or State agencies, documentation fro m the agency showing its compliance with Section 7(a)(2)
of the ESA will be submitted. In addition, we have determined that the land and any existing or proposed structures to be removed from the SFHA are
or will be reasonably safe from flooding as defined in 44CFR 65.2(c), and that we have available upon request by FEMA, all analyses and
documentation used to make this determination.
Community Official’s Name and Title: Mr. Ken Griffin, P.E., CFM
Director of Engineering and Public Works.
Community Name: City of Coppell
Mailing Address:
265 Parkway Blvd., Coppell, TX, 75019
Daytime Telephone No.: 972-304-3686 Fax No.:
E-Mail Address: kgriffin@coppelltx.gov
Community Official’s Signature (required): Date:
CERTIFICATION BY REGISTERED PROFESSIONAL ENGINEER AND/OR LAND SURVEYOR
This certification is to be signed and sealed by a licensed land surveyor, registered professional engineer, or architect aut horized by law to certify
elevation information data, hydrologic and hydraulic analysis, and any other supporting information as per NFIP regulations paragraph 65.2(b) and as
described in the MT-2 Forms Instructions. All documents submitted in support of this request are correct to the best of my knowledge. I understand that
any false statement may be punishable by fine or imprisonment under Title 18 of the United States Code, Section 1001.
Certifier’s Name: Niraj Acharya, P.E., CFM License No.: 107110 Expiration Date: 09/2016
Company Name: Teague Nall and Perkins Telephone No.: 817-336-5773 Fax No.: 817-336-2813
Signature:
Date: 26 AUG 16 E-Mail Address: nacharya@tnpinc.com
FEMA Form 086-0-27, (2/2011) Previously FEMA Form 81-89 MT-2 Form 1 Page 3 of 3
Ensure the forms that are appropriate to your revision request are included in your submittal.
Form Name and (Number) Required if …
Riverine Hydrology and Hydraulics Form (Form 2) New or revised discharges or water-surface elevations
Riverine Structures Form (Form 3) Channel is modified, addition/revision of bridge/culverts,
addition/revision of levee/floodwall, addition/revision of dam
Coastal Analysis Form (Form 4) New or revised coastal elevations
Coastal Structures Form (Form 5) Addition/revision of coastal structure
Alluvial Fan Flooding Form (Form 6) Flood control measures on alluvial fans
FEMA Form 086-0-27A, (2/2011) Previously FEMA Form 81-89 MT-2 Form 2 Page 1 of 3
U.S. DEPARTMENT OF HOMELAND SECURITY
FEDERAL EMERGENCY MANAGEMENT AGENCY
RIVERINE HYDROLOGY & HYDRAULICS FORM
O.M.B No. 1660-0016
Expires February 28, 2014
PAPERWORK BURDEN DISCLOSURE NOTICE
Public reporting burden for this form is estimated to average 3.5 hours per response. The burden estimate includes the time for reviewing instructions,
searching existing data sources, gathering and maintaining the needed data, and completing, reviewing, and submitting the form. You are not
required to respond to this collection of information unless a valid OMB control number appears in the upper right corner of this form. Send comments
regarding the accuracy of the burden estimate and any suggestions for reducing this burden to: Information Collections Management, Department of
Homeland Security, Federal Emergency Management Agency, 1800 South Bell Street, Arlington VA 20958-3005, Paperwork Reduction Project
(1660-0016). Submission of the form is required to obtain or retain benefits under the National Flood Insurance Program. Please do not send your
completed survey to the above address.
PRIVACY ACT STATEMENT
AUTHORITY: The National Flood Insurance Act of 1968, Public Law 90-448, as amended by the Flood Disaster Protection Act of 1973, Public Law
93-234.
PRINCIPAL PURPOSE(S): This information is being collected for the purpose of determining an applicant's eligibility to request changes to National
Flood Insurance Program (NFIP) Flood Insurance Rate Maps (FIRM).
ROUTINE USE(S): The information on this form may be disclosed as generally permitted under 5 U.S.C § 552a(b) of the Privacy Act of 1974, as
amended. This includes using this information as necessary and authorized by the routine uses published in DHS/FEMA/NFIP/LOMA-1 National
Flood Insurance Program (NFIP); Letter of Map Amendment (LOMA) February 15, 2006, 71 FR 7990.
DISCLOSURE: The disclosure of information on this form is voluntary; however, failure to provide the information requested may delay or p revent
FEMA from processing a determination regarding a requested change to a NFIP Flood Insurance Rate Maps (FIRM).
Flooding Source: Cottonwood Branch
Note: Fill out one form for each flooding source studied
A. HYDROLOGY
1.Reason for New Hydrologic Analysis (check all that apply)
Not revised (skip to section B) No existing analysis Improved data
Alternative methodology Proposed Conditions (CLOMR) Changed physical condition of watershed
2.Comparison of Representative 1%-Annual-Chance Discharges
Location Drainage Area (Sq. Mi.) Effective/FIS (cfs) Revised (cfs)
3.Methodology for New Hydrologic Analysis (check all that apply)
Statistical Analysis of Gage Records Precipitation/Runoff Model Specify Model:
Regional Regression Equations Other (please attach description)
Please enclose all relevant models in digital format, maps, computations (including computation of parameters), and documentation to support the
new analysis.
4.Review/Approval of Analysis
If your community requires a regional, state, or federal agency to review the hydrologic analysis, please attach evidence of approval/review.
5.Impacts of Sediment Transport on Hydrology
Is the hydrology for the revised flooding source(s) affected by sediment transport? Yes No
If yes, then fill out Section F (Sediment Transport) of Form 3. If No, then attach your explanation..
FEMA Form 086-0-27A, (2/2011) Previously FEMA Form 81-89 MT-2 Form 2 Page 2 of 3
B. HYDRAULICS
1.Reach to be Revised
Description Cross Section Water-Surface Elevations (ft.)
Effective Proposed/Revised
Downstream Limit* 277 ft D/S of Sandy Lake Rd.9233 476.75 476.75
Upstream Limit* 357 ft U/S of Freeport Pkwy 12707 490.50 490.50
*Proposed/Revised elevations must tie-into the Effective elevations within 0.5 foot at the downstream and upstream limits of revision.
2.Hydraulic Method/Model Used: HEC-RAS v. 4.1 – 1-D, Steady State, Backwater Analysis
3.Pre-Submittal Review of Hydraulic Models*
DHS-FEMA has developed two review programs, CHECK-2 and CHECK-RAS, to aid in the review of HEC-2 and HEC-RAS hydraulic models,
respectively. We recommend that you review your HEC-2 and HEC-RAS models with CHECK-2 and CHECK-RAS.
4.
Models Submitted Natural Run Floodway Run Datum
Duplicate Effective Model* File Name:
*.p02
Plan Name:
Duplicate Eff FP
File Name:
*.p01
Plan Name:
Duplicate Eff FW NAVD 88
Corrected Effective Model* File Name: Plan Name: File Name: Plan Name: NAVD 88
Existing or Pre-Project
Conditions Model
File Name:
*.p03
Plan Name:
Pre-Project
File Name:
*.p04
Plan Name:
Pre-Project FW NAVD 88
Revised or Post-Project
Conditions Model
File Name:
*.p17
Plan Name:
As Built - FP
File Name:
*.p18
Plan Name:
As Built - FW NAVD 88
Other - (attach description) File Name:
*.p09
Plan Name:
Pre-Project-Ult
File Name:
*.p16
Plan Name:
As Built - Ult NAVD 88
*For details, refer to the corresponding section of the instructions.
Digital Models Submitted? (Required)
C. MAPPING REQUIREMENTS
A certified topographic work map must be submitted showing the following information (where applicable): the boundaries of the effective, existing,
and proposed conditions 1%-annual-chance floodplain (for approximate Zone A revisions) or the boundaries of the 1%- and 0.2%-annual-chance
floodplains and regulatory floodway (for detailed Zone AE, AO, and AH revisions); location and alignment of all cross sections with stationing control
indicated; stream, road, and other alignments (e.g., dams, levees, etc.); current community easements and boundaries; boundaries of the requester's
property; certification of a registered professional engineer registered in the subject State; location and description of reference marks; and the
referenced vertical datum (NGVD, NAVD, etc.).
Digital Mapping (GIS/CADD) Data Submitted (preferred)
Topographic Information: 1 ft ground survey (in project area) and 2 ft aerial topography (overbanks)
Source: 1 ft - TNP survey (2013); 2 ft – NCTCOG (2001) Date:
Accuracy: 1 ft and 2 ft
Note that the boundaries of the existing or proposed conditions floodplains and regulatory floodway to be shown on the revised FIRM and/or FBFM
must tie-in with the effective floodplain and regulatory floodway boundaries. Please attach a copy of the effective FIRM and/or FBFM, at the same
scale as the original, annotated to show the boundaries of the revised 1%-and 0.2%-annual-chance floodplains and regulatory floodway that tie-in with
the boundaries of the effective 1%-and 0.2%-annual-chance floodplain and regulatory floodway at the upstream and downstream limits of the area on
revision.
Annotated FIRM and/or FBFM (Required)
FEMA Form 086-0-27A, (2/2011) Previously FEMA Form 81-89 MT-2 Form 2 Page 3 of 3
D. COMMON REGULATORY REQUIREMENTS*
1.For LOMR/CLOMR requests, do Base Flood Elevations (BFEs) increase? Yes No
a. For CLOMR requests, if either of the following is true, please submit evidence of compliance with Section 65.12 of the NFIP regulations:
The proposed project encroaches upon a regulatory floodway and would result in increases above 0.00 foot compared to pre-project
conditions.
The proposed project encroaches upon a SFHA with or without BFEs established and would result in increases above 1.00 foot
compared to pre-project conditions.
b. Does this LOMR request cause increase in the BFE and/or SFHA compared with the effective BFEs and/or SFHA? Yes No
If Yes, please attach proof of property owner notification and acceptance (if available). Elements of and examples of property owner
notifications can be found in the MT-2 Form 2 Instructions.
2.Does the request involve the placement or proposed placement of fill? Yes No
If Yes, the community must be able to certify that the area to be removed from the special flood hazard area, to include any structures or
proposed structures, meets all of the standards of the local floodplain ordinances, and is reasonably safe from flooding in accordance with the
NFIP regulations set forth at 44 CFR 60.3(A)(3), 65.5(a)(4), and 65.6(a)(14). Please see the MT-2 instructions for more information.
3.For LOMR requests, is the regulatory floodway being revised? Yes No
If Yes, attach evidence of regulatory floodway revision notification. As per Paragraph 65.7(b)(1) of the NFIP Regulations, notification is
required for requests involving revisions to the regulatory floodway. (Not required for revisions to approximate 1%-annual-chance floodplains
[studied Zone A designation] unless a regulatory floodway is being established. Elements and examples of regulatory floodway revision
notification can be found in the MT-2 Form 2 Instructions.)
4.For CLOMR requests, please submit documentation to FEMA and the community to show that you have complied with Sections 9 and 10 of the
Endangered Species Act (ESA). See attached Letter of No Effect, Appendix C
For actions authorized, funded, or being carried out by Federal or State agencies, please submit documentation from the agency showing its
compliance with Section 7(a)(2) of the ESA. Please see the MT-2 instructions for more detail.
* Not inclusive of all applicable regulatory requirements. For details, see 44 CFR parts 60 and 65.
FEMA Form 086-0-27B, (2/2011) Previously FEMA Form 81-89B MT-2 Form 3 Page 1 of 3
DEPARTMENT OF HOMELAND SECURITY
FEDERAL EMERGENCY MANAGEMENT AGENCY
RIVERINE STRUCTURES FORM
O.M.B. NO. 1660-0016
Expires February 28, 2014
PAPERWORK BURDEN DISCLOSURE NOTICE
Public reporting burden for this form is estimated to average 7 hours per response. The burden estimate includes the time for reviewing
instructions, searching existing data sources, gathering and maintaining the needed data, and completing, reviewing, and subm itting the form.
You are not required to respond to this collection of information unless a valid OMB control number appears in the upper right corner of this form.
Send comments regarding the accuracy of the burden estimate and any suggestions for reducing this burden to: Information Coll ections
Management, Department of Homeland Security, Federal Emergency Management Agency, 1800 South Bell Street, Arlington, VA 20598-3005,
Paperwork Reduction Project (1660-0016). Submission of the form is required to obtain or retain benefits under the National Flood Insurance
Program. Please do not send your completed survey to the above address.
PRIVACY ACT STATEMENT
AUTHORITY: The National Flood Insurance Act of 1968, Public Law 90-448, as amended by the Flood Disaster Protection Act of 1973, Public Law
93-234.
PRINCIPAL PURPOSE(S): This information is being collected for the purpose of determining an applicant's eligibility to request changes to National
Flood Insurance Program (NFIP) Flood Insurance Rate Maps (FIRM).
ROUTINE USE(S): The information on this form may be disclosed as generally permitted under 5 U.S.C § 552a(b) of the Privacy Act of 1974, as
amended. This includes using this information as necessary and authorized by the routine uses published in DHS/FEMA/NFIP/LOMA -1 National
Flood Insurance Program; Letter of Map Amendment (LOMA) February 15, 2006, 71 FR 7990.
DISCLOSURE: The disclosure of information on this form is voluntary; however, failure to provide the information requested may delay or prevent
FEMA from processing a determination regarding a requested change to a NFIP Flood Insurance Rate Maps (FIRM).
Flooding Source: Cottonwood Branch
Note: Fill out one form for each flooding source studied.
A. GENERAL
Complete the appropriate section(s) for each Structure listed below:
Channelization...............complete Section B
Bridge/Culvert................complete Section C
Dam...............................complete Section D
Levee/Floodwall.............complete Section E
Sediment Transport........complete Section F (if required)
Description Of Modeled Structure
1.Name of Structure: Sandy Lake Road Bridge
Type (check one): Channelization Bridge/Culvert Levee/Floodwall Dam
Location of Structure: Sandy Lake Road @ Cottonwood Branch (between Winding Hollow Lane and N. Coppell Road)
Downstream Limit/Cross Section: 9430
Upstream Limit/Cross Section: 9590
2.Name of Structure: Freeport Parkway Bridge
Type (check one): Channelization Bridge/Culvert Levee/Floodwall Dam
Location of Structure: Freeport Parkway @ Cottonwood Branch (1850 feet north of Ruby Road)
Downstream Limit/Cross Section: 12567
Upstream Limit/Cross Section: 12707
3.Name of Structure:
Type (check one) Channelization Bridge/Culvert Levee/Floodwall Dam
Location of Structure:
Downstream Limit/Cross Section:
Upstream Limit/Cross Section:
NOTE: FOR MORE STRUCTURES, ATTACH ADDITIONAL PAGES AS NEEDED.
FEMA Form 086-0-27B, (2/2011) Previously FEMA Form 81-89B MT-2 Form 3 Page 2 of 3
B. CHANNELIZATION
Flooding Source:
Name of Structure:
1.Hydraulic Considerations
The channel was designed to carry (cfs) and/or the -year flood.
The design elevation in the channel is based on (check one):
Subcritical flow Critical flow Supercritical flow Energy grade line
If there is the potential for a hydraulic jump at the following locations, check all that apply and attach an explanation of how the hydraulic
jump is controlled without affecting the stability of the channel.
Inlet to channel Outlet of channel At Drop Structures At Transitions
Other locations (specify):
2.Channel Design Plans
Attach the plans of the channelization certified by a registered professional engineer, as described in the instructions.
3.Accessory Structures
The channelization includes (check one):
Levees [Attach Section E (Levee/Floodwall)] Drop structures Superelevated sections
Transitions in cross sectional geometry Debris basin/detention basin [Attach Section D (Dam/Basin)] Energy dissipator
Weir Other (Describe):
4.Sediment Transport Considerations
Are the hydraulics of the channel affected by sediment transport? Yes No
If yes, then fill out Section F (Sediment Transport) of Form 3. If No, then attach your explanation for why sediment transport was not
considered.
C. BRIDGE/CULVERT
Flooding Source: Cottonwood Branch
Name of Structure: Sandy Lake Drive Bridge
1.This revision reflects (check one):
Bridge/culvert not modeled in the FIS
Modified bridge/culvert previously modeled in the FIS
Revised analysis of bridge/culvert previously modeled in the FIS
2.Hydraulic model used to analyze the structure (e.g., HEC-2 with special bridge routine, WSPRO, HY8): HEC-RAS v. 4.1
If different than hydraulic analysis for the flooding source, justify why the hydraulic analysis used for the flooding source could not analyze
the structures. Attach justification.
3.Attach plans of the structures certified by a registered professional engineer. The plan detail and information should include the following
(check the information that has been provided):
Dimensions (height, width, span, radius, length) Distances Between Cross Sections
Shape (culverts only) Erosion Protection
Material Low Chord Elevations – Upstream and Downstream
Beveling or Rounding Top of Road Elevations – Upstream and Downstream
Wing Wall Angle Structure Invert Elevations – Upstream and Downstream
Skew Angle Stream Invert Elevations – Upstream and Downstream
Cross-Section Locations
4.Sediment Transport Considerations
Are the hydraulics of the structure affected by sediment transport? Yes No
If Yes, then fill out Section F (Sediment Transport) of Form 3. If no, then attach an explanation. (SEE ATTACHED SUPPLEMENT)
FEMA Form 086-0-27B, (2/2011) Previously FEMA Form 81-89B MT-2 Form 3 Page 3 of 3
B. CHANNELIZATION
Flooding Source:
Name of Structure:
1.Hydraulic Considerations
The channel was designed to carry (cfs) and/or the -year flood.
The design elevation in the channel is based on (check one):
Subcritical flow Critical flow Supercritical flow Energy grade line
If there is the potential for a hydraulic jump at the following locations, check all that apply and attach an explanation of how the hydraulic jump is
controlled without affecting the stability of the channel.
Inlet to channel Outlet of channel At Drop Structures At Transitions
Other locations (specify):
2.Channel Design Plans
Attach the plans of the channelization certified by a registered professional engineer, as described in the instructions.
3.Accessory Structures
The channelization includes (check one):
Levees [Attach Section E (Levee/Floodwall)] Drop structures Superelevated sections
Transitions in cross sectional geometry Debris basin/detention basin [Attach Section D (Dam/Basin)] Energy dissipator
Weir Other (Describe):
4.Sediment Transport Considerations
Are the hydraulics of the channel affected by sediment transport? Yes No
If yes, then fill out Section F (Sediment Transport) of Form 3. If No, then attach your explanation for why sediment transpo rt was not considered.
C. BRIDGE/CULVERT
Flooding Source: Cottonwood Branch
Name of Structure: Freeport Parkway Bridge
3.This revision reflects (check one):
Bridge/culvert not modeled in the FIS
Modified bridge/culvert previously modeled in the FIS
Revised analysis of bridge/culvert previously modeled in the FIS
4.Hydraulic model used to analyze the structure (e.g., HEC-2 with special bridge routine, WSPRO, HY8): HEC-RAS v. 4.1
If different than hydraulic analysis for the flooding source, justify why the hydraulic analysis used for the flooding source could not analyze the
structures. Attach justification.
3.Attach plans of the structures certified by a registered professional engineer. The plan detail and information should include the following (check
the information that has been provided):
Dimensions (height, width, span, radius, length) Distances Between Cross Sections
Shape (culverts only) Erosion Protection
Material Low Chord Elevations – Upstream and Downstream
Beveling or Rounding Top of Road Elevations – Upstream and Downstream
Wing Wall Angle Structure Invert Elevations – Upstream and Downstream
Skew Angle Stream Invert Elevations – Upstream and Downstream
Cross-Section Locations
4.Sediment Transport Considerations
Are the hydraulics of the structure affected by sediment transport? Yes No
If Yes, then fill out Section F (Sediment Transport) of Form 3. If no, then attach an explanation. (SEE ATTACHED SUPPLEMENT)