The URL can be used to link to this page

Alexander CT-CS080327Page 1 of 1 Ken Griffin - Alexander Flood Study From: Ken Griffin To: Clay Phillips; David Dodd; David Ritter; Gary Sieb; Jim Witt; Marcie Diamond Date: 3/27/2008 3:18 PM Subject: Alexander Flood Study CC: Michael Garza; Rhonda Adloo I received the official revision to the floodplain map today from FEMA. It is dated 3/24/2008 and becomes effective 4/24/2008. It generally conforms to what was submitted by Nathan Maier - the consultant for Mr. Hawkins. I reviewed the information received against the plat that was submitted and the only change to the plat caused by the FEMA revision is that the minimum finish floor elevation for Lot 11 needs to be changed from 493.7 to 495. At this time, Mr. Hawkins should be able to submit the final plat with the revised floodplain for P &Z approval on April 17, 2008. This is being conveyed to Mr. Hawkins with the DRC comments that will be sent out tomorrow. Ken Griffin file: HC: \Documents and Settings \radloo \Local Settings \Temp \XPgrpwise \47EBBACECity... 2/19/2010 AR°�'jy� gy p, y�, 5 � `y ► Federal Emergency Management Agency Wnehington, D.C, ZQ472 MAR 2 42908 CERTIFIED MAIL. RET REC RUQUE The Il onorableL Dou glas N. Stover Mayor, City of Coppell P.O.-Box 9479 - CoppeU TX 75019 Dear Mayor Sto ir: IN REPLY REFER TO Case No.: C6tmunfty Name: Commun No.: 07 - 06 -2203P city Orcoppcll, TX 480170 e111vc uaw yr 20-- 'n,is Revision: APR 2 4 The Flaw Insurm= Study repori and Flow htmawe Rate: Map- for your com have been revised by this Letter of Map Rovision (LOMR). Please use the enclosed annotated gala panel(s) revised by this LOMR for f ]oodplain management puTosea and for ail flood- insurance policies and renewals issued in your community. Additional do+cunionm are emlosad which pro vi& infomation regarding ft4 ,L0KR, Pleame see the List of EncWurc* below to determine which documents are included. Other attachments spmiffc to this requcst may be iW ded w refe_tvnccd in the get nation Doument, If your have any questions regarding floodplain mansgcmcmt regulations for your comxminity or the National Flood Insurance Program (NFIP) in general, plea conwt the CO- MU' Rat'n C 66rdinaatioll Of�rr for your c:oniinum"try. Wyou have any technical questions regarding this LOMB, please contact the Director, Mitigation Divisiou of the Dcparfincnt of Wmel an- Sec% why r X F KmeTgency Mawiqfnnent A VWy (FEMA,) in rented, Tens, at (940) 898 -5127, or the EEMA Map Assistance Center toll free at 1 -877- 336 -2627 (1 «8774TMA MAP). Additional information about the TF` - unavailable on our wobsite at hitp : / /www. fe . gov /nip, Sincerely, .f oaltu a A. Smith, CF M, Program Special LM Engineering Managetn gent Branch Mii awti pimd4rate List of Enclosures: Lotter of Map Revises Deta minatww Dwutwt Annotated Flood Insurance Rate Map Annotated Flood 7nSurnnec- Study Report- cc! Mr. K en Griffin, P.E. Director of Ettgftwccrxpg P ubl ic W orks City of Copps} 1:'or: William R. RWaton Tr_, UK Chief Ingineering Managemeni Branch Mitigation- Din to Mr. Michael 11. Boyd, P.I . Executive Vico Presi Natimn D. Maier Consulting tnginecrs, be. KTiti1 4' � � Federal Emergency Management Agency 0.. Washington, D.C. 20472 REC E i v E D MAR 2 4 2008 Mai 2 7 2008 CERTIFIED MAIL NDM CONSULTING ENG RETURN RECEIPT REQUESTED IN REPLY REFER TO: The Honorable Douglas N. Stover Case No.: 07- 06 -2203P Mayor, City of Coppell Community Name: City of Coppell, TX P.O. Box 9478 Community No.: 480170 Coppell, TX 75019 Effective Date of APR 2 4 ZOOS This Revision: 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 (1- 877 -FEMA MAP). Additional information about the NFIP is available on our website at http: / /www.fema.gov /nfip. Sincerely, op 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: MA R 2 4 2008 Effective Date: I I APR 2 4 2D 08 Case No.: 07- 06 -2203P LOMB -APP ZU Federal Emergency Management Agenc , Washington, D.C. 20472 1F _.. 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.: 480174 IDENTIFIER Grapevine Creek APPROXIMATE LATITUDE & LONGITUDE: 32.57, - 97.014 SOURCE: USGS QUADRANGLE DATUM: NAD 27 ANNOTATED M ENC L O SURES ANNOTATED STUDY ENCLOSURE TYPE: FIRM* NO.: 4811300155 J DATE: August 23, 2001 DATE OF EFFECTIVE FLOOD INSURANCE STUDY REPORT: June 16, 2005 TYPE: FIRM* NO: 48113CO135 J DATE: August 23, 2001 PROFILES): 212P, 213P and 216P FLOODWAY DATA TABLE: 8 Enclosures reflect changes to flooding sources affected by this revision. c _ * 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 St 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 - c != 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 Creels 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 LOMB Depot, 3601 Eisenhower Avenue, Alexandria, VA 22304 Additional Information about the NFIP is available on our website at http: / /www fema,gov /nfip Joshua A Smith, CFM, Program Specialist Engineering Management Branch Mitigation Directorate 112553 10.3.1.07062203 102 -1 -A -C i f . , Page 2 of 4 Issue Date: MAR 2 4 2008 I Effective Date: APR 2 4 200 I Case No.: 07- 06 -2203P LOMR -APP 71= Federal Emergency Management Agenc r r Washington, D.C. 20472 LETTER OF MAP REVISION DETERMINATION DOCUMENT (CONTINUED) COMMUNITY INFORMATION 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 LOMB, 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 1- 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 lave 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. Joshua A. Smith, CFM, Program Specialist Engineering Management Branch Mitigation Directorate 112553 10.3.1.07062203 102 -1 -A -C Page 3 of 4 Issue Date M� 2 4 �� i Effective Date: Q�� 2 4 ��0� i Case No.: 07- 06 -2203P LOMR-APP v: +P, €° Federal Emergency Management Agency Washington, D.C. 20472 Of ��NO SE 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 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 LOMB Depot, 3601 Eisenhower Avenue, Alexandria, VA 22304. Additional Information about the NFIP is available on our website at http: / /www.fema.gov /nfip. r� Joshua A. Smith, CFM, Program Specialist Engineering Management Branch Mitigation Directorate 112553 10.3.1.07062203 102 -1 -A -C Page 4 of 4 Issue Date: 200a Effective Date: APR No.: 07- 06 -2203P 4�AR 4 z_ I � l Case LOMR -APP I � o on Federal Emerg Management Ag enc y -iJ Washington, D.C. 20472 LETTER OF MAP REVISION DETERMINATION DOCUMENT (CONTINUED) PUBLIC NOTIFICATION OF REVISION PUBLIC NOTIFICATION FLOODING SOURCE LOCATION OF REFERENCED ELEVATION BFE (FEET NGVD 29) MAP PANEL EFFECTIVE REVISED NUMBER(S) Grapevine Creek Approximately 300 feet downstream of 485 484 4811300155 J Denton Tap Road Approximately 300 feet downstream of 502 501 48113C0155 J St. Louis Southwestern Railway Tributary G -1 of Grapevine Creek Just upstream of the confluence with Grapevine Creek 494 493 4811300155 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.floodmaps.fema.gov/fhni/Scripts/bfe 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. Additional Information about the NFIP is available on our website at http: / /www.fema.gov /nfip. Joshua A Smith, CFM, Program Specialist Engineering Management Branch Mitigation Directorate 112553 10.3.1.07062203 102 -1 -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- 05- 2203P; The Department of Homeland Security's Federal Emergency Management Agency solicits technical information or comments on the proposed Base (1- 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.floodmqps.fema.Rov/fhm/Scripts/bfe 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 of 2 Emer FEMAgov Federal •A _ Ag ency, Horne View Notices 71 Add Notice Edit]Defete Notices Administration Logout DEPARTMENT OF HOMELAND SECURITY Federal Emergency Management Agency cha` iges to Base Flood Elevations Determinations Download RTF Table 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 (BFEs) 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 Coppell The Honorable Douglas N. Stover Mayor, City of Coppell P.O. Box 9478 Coppell, Tx 75919 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) 545 -2993. 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 1,550 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) file: 11R:1NEW- REGI ONO 6\48 TEXAS\ 113 DALLAS COUNTY l07-- 06- 2203P1Corz espon... 3/20/2008 FEMA: Base Flood Elevation Notices on the Web Page 2 of 2 + Elevation in feet (NAVD) # Depth in feet above ground ^ Elevation in meters (MSL) 4 S ource of Y }3 L � h� mod 3 �/°' 11 L on Eid g - Modified Affected � Fl odi g F lood i ng a Coordinates IF n C nin - iu i le Grapevine Creek City of Coppell Approximately 300 feet 32 57 15,E - downstream of Denton 96 59 16" *485 * 434 Tap Road Approximately 300 feet 32 57, 69 „ / - downstream of St. Louis 970 06, 04,E *502 * 501 Southwestern Railway Tributary G -1 of Grapevine Creek City of Coppell Just upstream of the 32 57' 10 „ - confluence with 960701 * 494 * 493 Grapevine Creek All elevations referenced to the National Geodetic Vertical Datum of 1929 (NGVD). National Geodetic Vertical Datum, rounded to nearest whole foot North American Vertical Datum, rounded to nearest whole foot 3 Depth in feet above ground, rounded to nearest whole foot 4 Mean 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.0 20472 Phone: (202) 566 -1600 file:HR:1NEW-- REGI ONO 6\48 TEXASU 13 DALLAS COUNTY 107 06- 2203PICorrespond... 3/20/2008 -` ❑ OJT Y OF r 0 BETHEL S CHOOL C3 ROAD RD C%� R EVI ED EA ZONE Legend 1% annual chance (100 -Year) Floodplain 1 % annual chance (100 -Year) Floodway ° 0.2 /o annual chance (500 -Year) Floodplain Lo Uj AE Cr ❑ APPROXIMATE SCALE IN FEET Co T v 49 r LLj 1,000 500 0 '1,000 _j 0 ZONE AE Y MEADOW GREEK Q 0 ROAD U) 439 NAT� FLOOD INSURANCE PROGRAM ZONE AE 494, 4�9 FIRM 49 RM 199 FLOOD INSURANCE RATE MAP Tri 493 ZONE x of ra " DALLAS COUNTY, Grin `H 494 4 9,E r�� 4 � ,�a TEAS AND BE E L ROAD ZONE Creed 43 INCORPORATED AREAS ZON Lo ZONE X 47 r�ap�,r~"i IL 1 PANEL 155 OF 725 Creek LEIDALE (SEE MAP INDEX FOR PANELS NOT PRINTED) 600 . B A- T DRIVE Lj IS t CO 502_<� L O COMMUNITY NUMBER PANEL SUFFIX ZONE X REV CRRROLLTON, Ci7Y OF 480167 0155 180170 0155 J f ZONE AE AREA CTf 180171 0155 J V S. f C-11 Y 480180 0155 J �.r ECT LONIR BELTLINE ROAD Q k 'R 4 2W8 1 B lh ` 2 VE w ZONE X N w AP USER z CITY OF �1, -.�t �� • - 55 J w DALLAS L,w EFFECTIVE DATE: '&- Co 480171 w AUGUST 23 T 200i AIRLINE DRIVE Noi L.(rLe ZONE A Federal Emergency Management Agency �UBY � I I RUAt7 4 LOCH d . � A'V' BETHEL RID C/ A REVISED 1 w R o ARE <1 J ZONE AE 0 502 ZONE X RAI ST. LOUIS c=;� SOUTHWESTER ZONE AE (EL 502) SO19`�I�ESTi ESN I �' BOULEVARD LINT OF STUDY ' ZO N-E E LL C) ZONE X w ` AIRLINE ' 1WE COT r`N ROACH 8200 , T Legend 1% annual chance (100 -Year) Floodplain 1 % annual chance (100 -Year) Floodway 0.2% annual chance (500 -Year) FloodpIain APPROXIMATE SCALE IN FEET 1,000 500 0 1,000 NATIONAL FLOOD INSURANCE PROGRAM FIRM FLOOD INSURANCE RATE MAP DALLAS COUNTY, � J u 1 TEXAS AND Ct. m� PANEL 135 OF 725 N a CONTAINS: ZONE X Qf III COPPELL, CITY OF 480170 0135 J REVI � I KAYE STREET R CITY OF a MAP NUMBER 48113C0135 J E. EFFECTIVE DATE: Tribur G -1 AUGUST z3, 2001 COPPELL 0 i Creek FLOOD HAZARDS SHOWN OUTSIDE THE CITIES OF 480170 � COPPELL, DALLAS, AND IRVING ARE FOR LIMIT OF ZONE AE INFORMATION PURPOSES ONLY. FOR FLOOD DETAILED INSURANCE PURPOSES REFER TO SEPARATELY STUDI` 1 � I PUBLISHED FLOOD INSURANCE RATE MAPS. 4 LOCH d . � A'V' BETHEL RID C/ A REVISED 1 w R o ARE <1 J ZONE AE 0 502 ZONE X RAI ST. LOUIS c=;� SOUTHWESTER ZONE AE (EL 502) SO19`�I�ESTi ESN I �' BOULEVARD LINT OF STUDY ' ZO N-E E LL C) ZONE X w ` AIRLINE ' 1WE COT r`N ROACH 8200 , T Legend 1% annual chance (100 -Year) Floodplain 1 % annual chance (100 -Year) Floodway 0.2% annual chance (500 -Year) FloodpIain APPROXIMATE SCALE IN FEET 1,000 500 0 1,000 NATIONAL FLOOD INSURANCE PROGRAM FIRM FLOOD INSURANCE RATE MAP DALLAS COUNTY, u 1 TEXAS AND IN��RP ORATED AREAS m� PANEL 135 OF 725 N (SEE MAP INDEX FOR PANELS NOT PRINTED) CONTAINS: j COMMUNITY NUMBER PANEL SUFFIX III COPPELL, CITY OF 480170 0135 J REVI C;FY U 480171 0135 3 E U pip k) r'r 480160 0135 J p R R EF APR 2 4 2W8 MAP NUMBER 48113C0135 J E. EFFECTIVE DATE: AUGUST z3, 2001 S , Federal Emergency Management Agency IpIM Feet above mouth 2 Feet above confluence with Elm Fork T I � ��% 4s 1 -7z, n 1 -c-&r�j %" :,on a floodin from Elm Fork Trinit River 'Ju f. 7 %71 z a i ;lt P.011 zt a FEDERAL EMERGENCY MANAGEMENT AUW..Y > 1. M F LOO DWAY DATA DALLAS COUNTY, TX LI-FLECT L C0 Ll I - E r M AND INCORPORATED A E R 2 4MGLENN BRANCH - ff GRAPEVINE CREEK co i "-- ECTIVE TRIBUTARY G-1 OF GRAPEVINE CREEK FLOODING SOURCE FLOODWAY BASE FLOOD WATER SURFACE ELEVATION (NGVD FEET) WITH FLOODWAY MEAN VELOCITY SECTION AREA WITHOUT CROSS SECTION DISTANCE WIDTH (FEET} (SQUARE FEET) (FEET PER REGULATORY FLOODWAY INCREASE SECOND) Glenn Branch A 680 64 576 5.2 636,8 636.8 637.8 1.0 B 1,940' 58 531 3,11 644.4 644.4 645,2 0.8 C 2,750.' 55 343 8x6 1 650.4 650.4 651.2 U.0 D 3,670' 69 464 6 658,7 658.7 659-6 0-9 E 5.100 130 479 6.2 688.9 1 688.9 689.9 1.0 Grapevine Creek A 8,500 2 300 1.7718 5-5 439.6 438.5 3 438.5 3 00 B 12,900 2 940 3.141 3.1 448.0 4480 4485 05 C 1 14,170 2 470 2,079 5r 3 453-0 453.0 4538 08 D 16,5432 638 4,624 2.4 461.5 461.5 462.3 0-8 REVISED E 20,7002 370 3.063 19 471.5 471 5 4723 08 DATA F 22,700 2 200 1,56.6 7,5 478.0 478.0 478.4 04 G 24,000 349 2,498 4,7 482.5 482.5 482-9 04 H 269851 a 1 36 1.061 11.2 488.3 488x3 488-4 0a 1 1.301 8, 1 506-7 5067 507.1 0A 31.680' 119 Tributar G-1 of Grapevine Creek A 945 137 777 4.0 493,7 493-7 49 3 . 7 0.1 B 3,125 82 432 7.3 499.5 499.5 499.7 0.2 Feet above mouth 2 Feet above confluence with Elm Fork T I � ��% 4s 1 -7z, n 1 -c-&r�j %" :,on a floodin from Elm Fork Trinit River 'Ju f. 7 %71 z a i ;lt P.011 zt a FEDERAL EMERGENCY MANAGEMENT AUW..Y > 1. M F LOO DWAY DATA DALLAS COUNTY, TX LI-FLECT L C0 Ll I - E r M AND INCORPORATED A E R 2 4MGLENN BRANCH - ff GRAPEVINE CREEK co i "-- ECTIVE TRIBUTARY G-1 OF GRAPEVINE CREEK