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Alexander Ct-SY080324 Federal Emergency Management Agency Washington, D.C. 20472 MAR 2 4 2008 CERTIFIED MAIL RETURN RECEIPT REQUESTED The Honorable Douglas N. Stover Mayor, City of Coppell P.O. Box 9478 Coppell, TX 75019 IN REPLY REFER TO: Case No.: Community Name: Community No.: Effective Date of This Revision: APR 2 4 2008 07-06-2203P City of Coppell, TX 480170 Dear Mayor Stover: The Flood Insurance Study report and Flood Insurance Rate Map for your community have been revised by this Letter of Map Revision (LOMR). Please use the enclosed annotated map panel(s) revised by this LOMR for floodplain management purposes and for all flood insurance policies and renewals issued in your community. Additional documents are enclosed which provide information regarding this LOMR. Please see the List of Enclosures below to determine which documents are included. Other attachments specific to this request may be included as referenced in the Determination Document. If you have any questions regarding floodplain management regulations for your community or the National Flood Insurance Program (NFIP) in general, please contact the Consultation Coordination Officer for your community. If you have any technical questions regarding this LOMR, please contact the Director, Mitigation Division of the Department of Homeland Security's Federal Emergency Management Agency (FEMA) in Denton, Texas, at (940) 898-5127, or the FEMA Map Assistance Center toll free at 1-877-336-2627 (l-877-FEMA MAP). Additional information about the NFIP is available on our website at http://www.fema.gov/nfip. Sincerely, (7 / d;ID:d~//1 fi~ Joshua A. Smith, CFM, Program Specialist Engineering Management Branch Mitigation Directorate For: William R. Blanton Jr., CFM, Chief Engineering Management Branch Mitigation Directorate List of Enclosures: Letter of Map Revision Determination Document Annotated Flood Insurance Rate Map Annotated Flood Insurance Study Report cc: Mr. Ken Griffin, P.E. Director of Engineering Public Works City of Coppell Mr. Michael H. Boyd, P.E. Executive Vice President Nathan D. Maier Consulting Engineers, Inc. Page 1 of 4 \ Issue Date: MAR 2 4 2008 I Effective Date: APR 2 4 2008 I Case No.: 07-06-2203P I LOMR-APP ~y!\Rl'Ali. ~'9E~ ~. Federal Emergency Management Agency o ;.... Washington, D.C. 20472 ..~(> -0~' '<<1ND si'S LETTER OF MAP REVISION DETERMINATION DOCUMENT COMMUNITY AND REVISION INFORMATION PROJECT DESCRIPTION BASIS OF REQUEST City of Coppell BRIDGE FLOODWAY Dallas County HYDRAULIC ANALYSIS Texas NEW TOPOGRAPHIC DATA COMMUNITY COMMUNITY NO.: 480170 IDENTIFIER Grapevine Creek APPROXIMATE LATITUDE & LONGITUDE: 32.57, -97.014 SOURCE: USGS QUADRANGLE DATUM: NAD 27 ANNOTATED MAPPING ENCLOSURES ANNOTATED STUDY ENCLOSURES TYPE: FIRM' NO.: 48113C0155 J DATE: August 23, 2001 DATE OF EFFECTIVE FLOOD INSURANCE STUDY REPORT: June 16, 2005 TYPE: FIRM' NO.: 48113C0135 J DATE: August 23, 2001 PROFILE(S): 212P, 213P and 216P FLOODWAY DATA TABLE: 8 Enclosures reflect changes to flooding sources affected by this revision. , FIRM - Flood Insurance Rate Map; .. FBFM - Flood Boundary and Floodway Map; '" FHBM - Flood Hazard Boundary Map FLOODING SOURCE(S) & REVISED REACH(ES) Grapevine Creek - from approximately 1,650 feet downstream of Denton Tap Road to approximately 100 feet downstream of SI. Louis Southwestern Railway Tributary G-1 of Grapevine Creek - from just upstream of the confluence with Grapevine Creek to approximately 800 feet upstream SUMMARY OF REVISIONS Flooding Source Effective Flooding Revised Flooding Increases Decreases Grapevine Creek Zone AE Zone AE YES YES Floodway Floodway YES YES BFEs' BFEs NONE YES Tributary G-1 of Grapevine Creek BFEs BFEs NONE YES , BFEs - Base Flood Elevations DETERMINATION This document provides the determination from the Department of Homeland Security's Federal Emergency Management Agency (FEMA) regarding a request for a Letter of Map Revision (LOMR) for the area described above. Using the information submitted, we have determined that a revision to the flood hazards depicted in the Flood Insurance Study (FIS) report and/or National Flood Insurance Program (NFIP) map is warranted. This document revises the effective NFIP map, as indicated in the attached documentation. Please use the enclosed annotated map panels revised by this LOMR for floodplain management purposes and for all flood insurance policies and renewals in your community. This determination is based on the flood data presently available. The enclosed documents provide additional information regarding this determination. If you have any questions about this document, please contact the FEMA Map Assistance Center toll free at 1-877-336-2627 (1-877 -FEMA MAP) or by letter addressed to the LOMR Depot, 3601 Eisenhower Avenue, Alexandria, VA 22304. Additional Information about the NFIP is available on our website at http://www.fema.gov/nfip. /-1 / ~a:A(/ 4 A;.! /// Joshua A Smith, CFM, Program Specialist Engineering Management Branch Mitigation Directorate 112553 10.3.1.07062203 102-I-A-C Page 2 of 4 Issue Date: MAR 2 4 2008 Effective Date: APR 2 4 2008 Case No.: 07-06-2203P LOMR-APP Federal Emergency Management Agency Washington, D.C. 20472 LETTER OF MAP REVISION DETERMINATION DOCUMENT (CONTINUED) COMMUNITY INFORMA liON APPLICABLE NFIP REGULATIONS/COMMUNITY OBLIGATION We have made this determination pursuant to Section 206 of the Flood Disaster Protection Act of 1973 (P.L. 93-234) and in accordance with the National Flood Insurance Act of 1968, as amended (Title XIII of the Housing and Urban Development Act of 1968, P.L. 90-448), 42 U.S.C. 4001-4128, and 44 CFR Part 65. Pursuant to Section 1361 of the National Flood Insurance Act of 1968, as amended, communities participating in the NFIP are required to adopt and enforce floodplain management regulations that meet or exceed NFIP criteria. These criteria, including adoption of the FIS report and FIRM, and the modifications made by this LOMR, are the minimum requirements for continued NFIP participation and do not supersede more stringent State or local requirements to which the regulations apply. We provide the floodway designation to your community as a tool to regulate floodplain development. Therefore, the floodway revision we have described in this letter, while acceptable to us, must also be acceptable to your community and adopted by appropriate community action, as specified in Paragraph 60.3(d) of the NFIP regulations. NFIP regulations Subparagraph 60.3(b)(7) requires communities to ensure that the flood-carrying capacity within the altered or relocated portion of any watercourse is maintained. This provision is incorporated into your community's existing floodplain management ordinances; therefore, responsibility for maintenance of the altered or relocated watercourse, including any related appurtenances such as bridges, culverts, and other drainage structures, rests with your community. We may request that your community submit a description and schedule of maintenance activities necessary to ensure this requirement. COMMUNITY REMINDERS We based this determination on the I-percent-annual-chance flood discharges computed in the FIS for your community without considering subsequent changes in watershed characteristics that could increase flood discharges. Future development of projects upstream could cause increased flood discharges, which could cause increased flood hazards. A comprehensive restudy of your community's flood hazards would consider the cumulative effects of development on flood discharges subsequent to the publication of the FIS report for your community and could, therefore, establish greater flood hazards in this area. Your community must regulate all proposed floodplain development and ensure that permits required by Federal and/or State law have been obtained. State or community officials, based on knowledge of local conditions and in the interest of safety, may set higher standards for construction or may limit development in floodplain areas. If your State or community has adopted more restrictive or comprehensive floodplain management criteria, those criteria take precedence over the minimum NFIP requirements. We will not print and distribute this LOMR to primary users, such as local insurance agents or mortgage lenders; instead, the community will serve as a repository for the new data. We encourage you to disseminate the information in this LOMR by preparing a news release for publication in your community's newspaper that describes the revision and explains how your community will provide the data and help interpret the NFIP maps. In that way, interested persons, such as property owners, insurance agents, and mortgage lenders, can benefit from the information. This determination is based on the flood data presently available. The enclosed documents provide additional information regarding this determination. If you have any questions about this document, please contact the FEMA Map Assistance Center toll free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMR Depot, 3601 Eisenhower Avenue, Alexandria, VA 22304. Additional Information about the NFIP is available on our website at http://www.fema.gov/nfip. /"J I .4 )/cdp/! A.iI (~/ Joshua A. Smith, CFM, Program Specialist Engineering Management Branch Mitigation Directorate 112553 10.3.1.07062203 102-I-A-C Page 3 of 4 Issue Date: Effective Date: Case No.: 07-06-2203P LOMR-APP Federal Emergency Management Agency Washington, D.C. 20472 LETTER OF MAP REVISION DETERMINATION DOCUMENT (CONTINUED) We have designated a Consultation Coordination Officer (CCO) to assist your community. The CCO will be the primary liaison between your community and FEMA. For information regarding your CCO, please contact: Mr. Frank Pagano Director, Mitigation Division Federal Emergency Management Agency, Region VI Federal Regional Center, Room 206 800 North Loop 288 Denton, TX 76209 (940) 898-5127 STATUS OF THE COMMUNITY NFIP MAPS We are processing a revised FIRM and FIS report for Dallas County in our countywide format; therefore, we will not physically revise and republish the FIRM and FIS report for your community to incorporate the modifications made by this LOMR at this time. Preliminary copies of the countywide FIRM and FIS report, which present information from the effective FIRMs and FIS reports for your community, were submitted to your community for review on June 22, 2007. We will incorporate the modifications made by this LOMR into the countywide FIRM and FIS report before they become effective. This determination is based on the flood data presently available. The enclosed docl,lments provide additional information regarding this determination. If you have any questions about this document, please contact the FEMA Map Assistance Center toll free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMR Depot, 3601 Eisenhower Avenue, Alexandria, VA 22304. Additional Information about the NFIP is available on our website at http://www.fema.gov/nfip. /'1 / A I J~'! /:' .>7~"54u.?"/1 A-tI f.~-'/ Joshua A. Smith, CFM, Program SpeCialist Engineering Management Branch Mitigation Directorate 112553 10.3.1.07062203 102-I-A-C Page 4 of 4 I Issue Date: MAR 2 4 2008 I Effective Date: APR 2 4 2008 I Case No.: 07-06.2203P I LOMR-APP :(.\'."'RT<I{" v~,t. :::,'" .~. ?>~-; ::. :.. ~~. r o .... "- '- ...", .:v"" (rlND s \0". Federal Emergency Management Agency Washington, D.C. 20472 LETTER OF MAP REVISION DETERMINATION DOCUMENT (CONTINUED) PUBLIC NOTIFICATION OF REVISION PUBLIC NOTIFICATION BFE (FEET NGVD 29) Grapevine Creek EFFECTIVE 485 REVISED MAP PANEL NUMBER(S) FLOODING SOURCE LOCATION OF REFERENCED ELEVATION Approximately 300 feet downstream of Denton Tap Road Approximately 300 feet downstream of SI. Louis Southwestern Railway Tributary G-1 of Grapevine Creek Just upstream of the confluence with Grapevine Creek 484 48113C0155 J 502 501 48113C0155 J 494 493 48113C0155 J Within 90 days of the second publication in the local newspaper, a citizen may request that we reconsider this determination. Any request for reconsideration must be based on scientific or technical data. This revision will become effective 30 days from the date of this letter. However, until the 90-day period has elapsed, the revised BFEs presented in this LOMR may be changed. A notice of changes will be published in the Federal Register. A short notice also will be published in your local newspaper on or about the dates listed below. Please refer to FEMA's website at https://www.tloodmaps.fema.gov/flun/Scriptslbfe_main.asp for a more detailed description of proposed BFE changes, which will be posted within a week of the date of this letter. LOCAL NEWSPAPER Name: Coppell Gazette Dates: 04/02/2008 04/09/2008 This determination is based on the flood data presently available. The enclosed documents provide additional information regarding this determination. If you have any questions about this document, please contact the FEMA Map Assistance Center toll free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMR Depot, 3601 Eisenhower Avenue, Alexandria, VA 22304. Additionallnformalion about the NFIP is available on our website at http://www.fema.gov/nfip. /l~ / I, 4 )10=2;,/// p~ v' Joshua A Smith, CFM, Program Specialist Engineerin9 Management Branch Mitigation Directorate 11255310.3.1.07062203102-I-A-C DEPARTMENT OF HOMELAND SECURITY FEDERAL EMERGENCY MANAGEMENT AGENCY Proposed Base Flood Elevation Determination for the City of Coppell, Dallas County, TX and Case No. 07-06-2203P: The Department of Homeland Security's Federal Emergency Management Agency solicits technical information or comments on the proposed Base (l-percent-annual-chance) Flood Elevations (BFEs) shown in the Flood Insurance Study (FIS) and/or on the Flood Insurance Rate Map (FIRM) for your community. These proposed BFEs are the basis for the floodplain management measures that your community is required to either adopt or show evidence of having in effect in order to qualify or remain qualified for participation in the National Flood Insurance Program (NFIP). For a detailed listing of the proposed BFEs and information on the statutory period provided for appeals, please visit FEMA's website at https://www.floodmaps.fema.gov/fhm/Scriptslbfe main. asp, or call the FEMA Map Assistance Center toll free at 1-877-FEMA MAP. FEMA: Base Flood Elevation Notices on the Web Page 1 of2 ~, FEMA guv .....~~ ;: '::: j -j t:lflt .LP "IL't ~/; 3'1d ]CrHc'lt t....Jt 'l::Y Home - View Notices Add Notice Edit/Delete Notices Administration Logout Download RTF Table DEPARTMENT OF HOMELAND SECURITY Federal Emergency Management Agency Changes to Base Flood Elevations Determinations AGENCY: Federal Emergency Management Agency (FEMA), Department of Homeland Security. SUMMARY: On August 23,2001 the Department of Homeland Security's Federal Emergency Management Agency identified Special Flood Hazard Areas (SFHAs) in the City of Coppell, Dallas County, Texas, through issuance of a Flood Insurance Rate Map (FIRM). The Mitigation Directorate has determined that modification of the Base (1-percent-annual-chance) Flood Elevations (BPEs) for certain locations in this community is appropriate. DATES: Upon the second publication of notice of these changes in a newspaper of local circulation in your community, any person has 90 days in which he or she can request, through the Chief Executive Officer of the community, that the Mitigation Directorate reconsider the determination. Any request for reconsideration must be based on knowledge of changed conditions or new scientific or technical data. All interested parties are on notice that until the 90-day period elapses, the Mitigation Directorate's determination to modify the BFEs may itself be changed. ADDRESSES: Any person having knowledge or wishing to comment on these changes should immediately notify: City of Coppel! The Honorable Douglas N. Stover Mayor, City of Coppel! P.O. Box 9478 Coppell, TX 75019 FOR FURTHER INFORMATION CONTACT: William R. Blanton, Jr., CFM, Chief, Engineering Management Branch, Mitigation Directorate, Federal Emergency Management Agency, 500 C Street SW, Washington, DC 20472, (202) 646-2903. SUPPLEMENTARY INFORMATION: A hydraulic analysis was performed to incorporate modification to an existing bridge over Denton Tap Road across Grapevine Creek and updated topographic information along Grapevine Creek from approximately 1,650 feet downstream of Denton Tap Road to approximately 100 feet downstream of St. Louis Southwestern Railway and along Tributary G-1 of Grapevine Creek from it's confluence with Grapevine Creek to approximately 800 feet upstream. It results in increases and decreases in SFHA and floodway width for Grapevine Creek and has resulted in decreased BFEs for both flooding sources. The table below indicates existing and modified BFEs for selected locations along the affected lengths of the flooding source (s) cited above. * Elevation in feet (NGVD) 1 file://R:\NEW-REGION06\48 TEXAS\113 DALLAS COUNTY\07-06-2203P\Correspon... 3/20/2008 FEMA: Base Flood Elevation Notices on the Web Page 2 of2 + Elevation in feet (NA VD)2 # Depth in feet above ground3 ^ Elevation in meters (MSL) 4 Source of Flooding Grapevine Creek Approximately 300 feet downstream of Denton Tap Road Approximately 300 feet downstream of St. Louis Southwestern Railway Tributary G-1 of Grapevine Creek Just upstream of the confluence with Grapevine Creek Location LatlLong Coordinates Existing Modified BFE BFE Affected Communities City of Coppell 32057' 15" /- 960 59' 16" * 485 * 484 320 57' 09" / - 9r 00' 04" * 502 * 501 City of Coppell 32057' 10" /- 960 70' 45" * 494 * 493 All elevations referenced to the National Geodetic Vertical Datum of 1929 (NGVD). 1 National Geodetic Vertical Datum, rounded to nearest whole foot 2North American Vertical Datum, rounded to nearest whole foot 3Depth in feet above ground, rounded to nearest whole foot 4Mean Sea Level, rounded to the nearest 0.1 meter The changes are being made pursuant to Section 206 of the Flood Disaster Protection Act of 1973 (Public Law 93-234) and are in accordance with the National Flood Insurance Act of 1968, as amended (Title XIII of the Housing and Urban Development Act of 1968, Public Law 90-448), 42 U.S.C. 4001-4128, and 44 CFR Part 65. Under the above-mentioned Acts of 1968 and 1973, the Mitigation Directorate must develop criteria for floodplain management. To participate in the National Flood Insurance Program (NFIP), the community must use the modified BFEs to administer the floodplain management measures of the NFIP. These modified BFEs will also be used to calculate the appropriate flood insurance premium rates for new buildings and their contents and for the second layer of insurance on existing buildings and contents. Last Updated: Thursday, March 20, 2008 FEMA 500 C Street, SW Washington, D.C. 20472 Phone: (202) 566-1600 file://R:\NEW-REGION06\48 TEXAS\113 DALLAS COUNTY\07-06-2203P\Correspond... 3/20/2008 c Oiij ~a. c-o 1O 0 .c.Q ou. -0 -_ ~ ~ Co OJ C (1) (1) c~ -1 lOO ~~ T"-_ c (1)0- O~ co. lO-o .cO 00 roLL: :3'2 c 1O c (1) 1O~ ~O NO " LO 0_ >- 1O (1) ~ 0-0 C 0 1O 0 .c - ou. -- 1O L.. :3 1O C (1) C~ 1O I o -;:RO o T"- T"-_ II ~~. ~-:J1i =F tu ~ll UJ " LL 'I z II w II ;i. 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