The URL can be used to link to this page

ST8402-CS 870924Federal Emergency Management Agency Washington, D.C. 20472 SEP 2 981 CERTIFIED ~AIL RETURN RECEIPT REQUESTED The Honorable Lou Duggan Mayor of the City of Coppel] P.O. Box 478 Coppell, Texas 75019 IA-RA-RS (102) Community: City of Coppell, Denton County, Texas Map Panel Number: 480170 0005 C Effective Date of this Revision: September 24, 1987 Dear Mayor Duggan: This is in reference to a letter dated December 10, 1986, and technical data submitted by Ms. Shohre Daneshmand, City civil Engineer for the City of Coppell, regarding the Flood Insurance Study (FIS) for your community. In her letter, Ms. Daneshmand requested that the Federal Emergency Management Agency (FEMA) issue a Letter of Map Amendment (LOMA) to incorporate completed channel and floodplain modifications along Denton Creek. The area of concern for this request extends from Denton Tap Road to De Forest Road. All necessary materials to process this requ~-s~ve-~-~ of June 29, 1987. noted that a LOMA is issued only to remove the Special Flood It should be . [~eod ~n~c~:ethe Hazard Area (SFHA) designation~ shown on t~ e~f~c~z~ i Map (FIRM), from an area occupied by a particular qxisting Base (100-year) Flood Elevation (BFE). Because this request is based on a completed channel modification, which results in a reduction in the BFEs and the 100- and 500-year floodplain delineations along a portion of Denton Creek, a Letter of Map Revision (LOMR) to the FIS, FIRM, and Flood Boundary and Floodway Map (FBFM) is being issued in lieu of a LOMA. A LO~4R is needed to revise the BFEs and 100- and 500-year floodplain delineations along Denton Creek based on changes in the hydraulic parameters used in the effective FIS, FIRM, and FBFM for your community- We have reviewed the submitted data that were prepared by Threadgill-Dowdey & Associates, which included the following: HEC-2 hydraulic modeling of pre- and post-channel modification conditions, dated June 29, 1987; and topographic mapping, dated September 12, 1986, representing the proposed changes to the . . and FBFM. Based on these data the BFEs and 100-year floodway FIS FIRM, .... , --~ enO =ear (Zone B) floodplains along ~ ' .... ~ ~ 100-year Denton Creek have been revise~ for a downstream of Denton Tap Road. This LOMR amends FIRM and FBFM number 480170, panel 0005 and the FIS text, all of which are dated February 15, 1984. These changes are shown on the enclosed flood profile sheets; annotated FIS text Table 2, entitled "Floodway Data"; annotated portion of FIRM panel 0005 C; and annotated portion of FBFM panel 0005. Please note that the locations of the Denton Creek cross sections B and C have been revised, as shown on the enclosures. Anderson Engineers, Inc., is currently restudying several streams within the City of Coppell, including Denton Creek; the analyses for the restudied streams are to be submitted to FEMA by your community for our review. The analyses will then be used as the basis for a revision to Coppell's FIS, FIRM, and FBFM. This LOMR will be superseded by the revised FIS, FIRM, and FBFM based on the Anderson Engineers analyses. Public notification of this LOMR will be given in The Citizens Advocate on or about October 9, 1987, and October 16, 1987. A copy of this notification is enclosed. In addition, notice of changes'will be published in the Federal Register. We encourage you to supplement this notification by preparing an article for publication in the community newspaper. This article should describe the changes that have been made and what assistance the community can give in providing data and interpreting the maps. It should be noted that National Flood Insurance Program regulation 44 CFR 60.3(b)(7) requires communities to "assure 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 regulations; consequently, responsibility for maintenance of the modified channel rests with your community. The revised BFES are effective as of the date of this letter; however, within 90 days of the second publication in The citizens Advocate, a citizen may request that FEMA reconsider the determination made by this LOMR. Any request for reconsideration must be based on scientific or technical data. All interested parties are on notice that until the 90-day period elapses, FEMA's determination to modify the BFEs presented in this LOMR may itself be modified. Since this LOMR will not be printed and distributed to users such as insurance agents and lenders, the community will serve as a repository for the new data. We encourage you to disseminate widely throughout the community the informa- tion reflected by this LOMR in order that interested persons may offer new information or comments. The determination made in this LOMR has been made pursuant to Section 206 of the Flood Disaster Protection Act of t973 (P.L. 93-234) and is 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. As required by this legislation, a community must adopt and enforce floodplain management regulations in order to ensure continued eligibility to participate in the National Flood Insurance Program. Therefore, the City of Coppell must enforce these regulations using, at a minimum, the elevations and zone designations in the SFHAs as shown on your community's FIRM, including the modifications made by this LOMR. The map as listed above and as amended by this letter will be used for all flood insurance policies and renewals issued for your community. A Consultation Coordination officer has been designated to assist you with any problems you may have concerning this LOMR. This officer will be the primary FEMA contact for your community, and can be reached at %he following address: Mr. Alton S. Ray, Acting Chief FEMA, Natural & Technological Hazards Division Federal Regional Center 800 North Loop 288 Denton, Texas 76201 (817) 898-9127 Any questions may be directed to your Consultation coordination officer. Sincerely, J~ L. Matticks chief, Risk Studies Division Federal Insurance Administration Enclosures cc: Ms. Shohre Daneshmand Mr. Art Whitney, Roberts & Dowdey Mr. Carl V. Anderson, P.E., Anderson Engineers, Inc. i U.I FILE COPY Federal Emergency Management Agency Region VI, Federal Center, 800 North Loop 288 Denton, Texas 76201-3(598 Plarch 30, 1~J88.. · Mr. H. Wayne Ginn Ginn, Incorporated Attention: John Karlsruher 17103 Preston Road, Suite 100 LB 118 Dallas, Texas 75248 Dear Plr. Ginn: This letter is being written to you in your role as Floodplain Administrator for the City of Coppell, Texas. By Letter of Transmittal you have requested that we determine whether a Conditional Letter of Plap Revision has been issued by FEPlA for a portion of Parks of Coppeli Joint Venture II, located west of Denton Tap Road within Cottonwood Branch floodplain. I have reviewed the correspondence attached to' your Letter of Tran§mittal and researched our Coppell Community files. These document that: 1~. No request for a Conditional Letter of Plap Revision for the subject portion of the Parks of Coppell has been received by FEPlA nor any Conditional Letter of Plap Revision issued based upon proposed 'floodplain modifications of this portion of Cottonwood Branch. 2) The letter dated November 8, 1982 from Plichael Baker, Jr., Inc. (FEPlA contract engineering firm) submitted to the City'of Coppell copies of a Pre- liminary Revised Flood Insurance Study based upon our approval of more accurate technical data obtained by Carter-Burgess, Inc., through use of 2 ft contour mapping and additional surveyed floodplain cross sections. This was for a 2.6 mile stream segment from DeForest Road to approximately 1/2 mile upstream of Denton Tap Road. The revised preliminary base flood elevations were published in the Coppell Star on Play 5 and 12, 1983, and were issued in a final, revised Flood Insurance Study with Flood Insurance RatePlaps and Floodway Plaps dated February 15, 1~8q. The subject revision was not related to any FEMA conditional approval of a pro- posed floodplain or floodway modification by Parks of Coppell Joint Venture II. FEPlA is restricted by regulation to revising currently effective maps only on the basis of FEPlA approved ~As-Built'~ conditions. Should you desire further assistance in this matter, please let me know. CC: Shohre Oanesmand / City of Coppell ~ngham Natural Hazards Program Specialist -, FILE COPY Federal Emergency Management City of Coppe11 ""' CoPY Dallas, Texas 75248 Dear Mr. Ginn: As requested, this letter provides further information relating to the issuance of a Conditional Letter of Map Revision by this Agency for the Parks of Coppell Joint Venture II on Cottonwood Creek, upstream of Denton Tap Road in Coppell. A complete search of the City of Coppell files in this office has verified that no request for a Federal Emergency Management Agency (F£MA) Conditional Letter of Map Revision has ever been received by our office for the subject property location. Also, we requested a search by the engineering staff at our National Office to determine if such submittal had been made direct to their office. They, likewise, determined that no submittal had been received in the past for this specific portion of Cottonwood Branch. In view of the above, it would appear that a "grandfathering" exception to Article 3, Section D of your present floodplain ordinance would not be warranted. That provision prohibits the development of any land within the floodplain without "full compliance with the terms of the ordinance and other applicable regulations". This Agency would expect the City of Coppell to fully and completely enforce all provisions of this ordinance, as adopted for continued participation in the National Flood Insurance Program (NFIP). To begin to grant exceptions to those provisions of the ordinance which are more restrictive than the minimum NFIP criteria, would considerably weaken the City's position from which it will be required to address future applications for floodplain development. This situation parallels a recent situation which required the City of Coppell to address requested exceptions to the Floodplain Ordinance with regard to swimming pools within a regulatory floodway. As stated in our correspondence relating to that matter, the strength which the City of Coppell addresses the enforcement of the currently effective ordinance, will have a strong impact upon its ability to apply the restrictive criteria for development along the Trinity River Corridor. The Common Vision Policy · and Common Permit Criteria of the nine communities who make up the Trinity River Corridor Common Vision will necessitate that regulations be enforced which are more restrictive and comprehensive than the minimum NFIP regulations. Mr. H. Wayne Ginn, P. £. In fairness to all citizens of the City of Coppell, it is important that the City consistently apply and enforce all provisions of the local ordinance which it has adopted to reduce the risk of flooding in all areas of the community. Should you desire further assistance in this or other matters, please do not hesitate to contact Maryetta Cunningham of my staff at 817-898-9161. Sincerely, (~ 0 [~X~ Copy to: ! Shohre Danesmand v ~ City of Coppell Alton S. Ray, P. E., Chief Natural and Technological Hazards Division GINN, INC. CONSULTING ENGINEERS October 13, 1987 Ms. Maryetta Cunningham Federal Emergency Management Agency Natural & Technological Hazards Division Regional VI Federal Center Denton, Texas 76201-3698 Re: Conditional letter of Map Revision Grapevine Creek - City'of Coppell' Dear Ms. Cunningham: Pursuant to our telephone conversation this morning, I am writing this letter to request that the City of Coppe11's portion of the subject joint submittal, the proposed bridge replacement at Denton Tap Road, be exempted from review fees and that the fees charged for review of the 18.4 Acre Tract be for the account of the engineer of record for the latter project: Don A. Tipton, Inc. 6330 Belt Line Road, Suite C Garland, Texas 75043 Attn. Mr. Robert Porter, Project Manager Also as discussed, the abovementioned projects are separate projects, neither of which would be totally dependent upon the other to be valid. The bridge replacement project is a part of a Capital Improvement Project for the City of Coppell: DENTON TAP ROAD IMPROVEMENTS FROM BELT LINE ROAD NORTH TO SANDY LAKE ROAD, for which Ginn, Inc. is the Project Engineer. I appreciate the time and effort that you spent discussing the various floodplain issues pertaining to the City of Coppell with me this morning. Please call me if you have any questions. Sincer$1y~ John C. Karlsruher, P.E. Mr. H. Wayne Ginn, P.E., City Engineer, City of Coppell Mrs. Shohre Daneshmand, Civil Engineer, City of Coppell Mr. Robert Porter, Don A. Tipton, Inc. 17103 Preston Road · Suite 100 · LB 118 · Dallas. Texas 75248 · Phone 214/248-4900 Federal Emergency Management Agency Washington, D.C. 20472 OCT 20 198~ .: .. Mr. H. Wayne Ginn, P.E. City Engineer P.O. Box 478 · Coppell, Texas 75019 TN REPLY lt.Ele'F~ 'lOs ZA-I~A-RS 44-72B Cue No. :88-06-07R 1~: Youm Septemeber 23, 1987 letter to Ms. Maryetta Cunntngham of FEMA Dear Mr. Ginn: This is in response to the above-mentioned letter requesting that the Federal Emergency Management Agency (FEMA) determine the effects of a proposed flood plain modifica~/on An ~he following community: City of Coppell, Texas (Projects: Proposed Denton Tap Road Bridge replacement and floodplain reclamation.) FEMA has ini~iated a reimbursement procedure ~o allow for ~he recovery of co~s associated wl~h ~he review of such requests, ~hereby =educing ~he expanses ~o ~he g~nexal ~axpayer. Enclosed for your lnfor~a~.ton As the final rule, as published in the Federal Re~ister on September 4, 1985, by which ~li~ was imple~en=ed. We are currently reviewing your request package to de,eLaine the appropriata processing procedure. When ~his inA~tal review is co-pieCed, we will ].nforn you of any fee or eddi~.tonal informat, ton ~hat My be required to con~.tnue tho processing of your Should you have any quest/one concerning this sattar, pleue contact sembers of our Heedquar~erm s~f in Washington, D.C., at (202) 646-2767. SinceEely, es Division Federal Insurance Admi, n4sCraCAon cc: Mr. Carl V. Anderson, P.E., PAWA-Winklomann & Associates, Inc. Ms. Shohre Danes~nand, City of Coppell Mr. Robert Porter Don A. Tipton, Inc. 6330 Belt Line Road, Suite C Garland, Texas ?5043 Federal Emergency Management Agency Washington, D.C. 20472 NOV 23 1981 N REFER TO: REPLY Dear ,~Lr. Porter= This is in response to a September 23, 1987 request for a conditional Letter of Map Revision (LOMR) from Mr. H. Wayne Ginn, P.E., City Engineer for the City of Coppell. The request concerned the proposed floodplain reclamation? project along GrapeVine Creek justupstream of the Denton Tap Road~bridge~~ Our initial review of the request.indicates that we have sufficient data to begin processing the request. However, as the review progresses, you may be asked to submit additional information in support of the request. The Federal Emergency Management Agency (FEMA) has initiated a reimbursement procedure to allow for the recovery of costs associated with the review of conditional LOMRs, thereby reducing, the expenses to the general taxpayer. The initial fee for this type of request is $400.00. This fee must be received by FEMA prior to commencement of our review. Please provide the total initial fee within 30 days of the date of this letter, in the form of a check or money orde~ made ~a~able to the United States Treasury. The initial fee should be submitted by Registered Mail, Return Receipt Requested, to the following address: Federal Emergency Management Agency Federal Insurance Administration Office of Risk Assessment Technical Operations Division 500 C Street, S.W., Room 422 Washington, DC 20472 ATTENTION MR. CHARLES A. LINDSEY The case number referenced above should be included on your check or money order for identification purposes. Please note that the initial fee is the minimum charge for a review of this type; additional costs could be required upon completion of our review and prior to issuance of a conditional LOMR depending on the nature of the re- quired review. You will be notified of the estimated total processing cost if it is anticipated that, due to the extent of the review required, the total cost will exceed $1,500. In that situation, our review would be suspended pending written authorization from you to proceed. 2 If you have any questions concerning FEMA policy, or the National Flood Insurance Program in general, please call the Chief, Natural and Technological Hazards Division of the Federal Emergency Management Agency in Denton, Texas, at (817) 898-9127, or members of our Headquarters staff in Washington, D.C., at (202) 646-2767. Chief, Risk Studies Division Federal Insurance ~lministration cc: Mr. H. Wayne Ginn, P.E., City Engineer, City of Cop~ell Mr. John C. Karlsruher, P.E., Ginn, Inc. -------"Ms. Shohre Daneshmand, Civil Engineer, City of Coppell Federal Emergency Management At Mr. John C. Karlsruher, P.E. Ginn, Inc. ]71 03 Preston Road Suite 100 Dallas, Texas 75248 Washington, D.C. 20472 NOV 2 4 J987 Dear Mr. Karlsruher: ~-RA-RS Case #88-06-13R This is in response to your October 13, 1987 letter, which was forwarded to us by our Region VI office. In your letter, you requested that the City of Coppell's proposed bridge replacement project at Denton Tap Road~be exempted from the fees associated with the review of a project of this type. The review of this project was initially requested by a September 23, 1987 letter from Mr. H. Wayne Ginn, P.E., City Engineer for the City of Coppell. The initial fee for a request of this type is $525.00. Please note that Section 72.5 of the National Flood Insurance Program regulations states that: "Federal, State, and local governments and their agencies shall be exempt from fees for projects they sponsor if the requestor certifies that the particular project is for public benefit and primarily intended for flood loss reduction to existing development in identified flood hazard areas, as opposed to planned floodplain development." Therefore, the Denton Tap Road bridge replacement project must meet these criteria to be exempt from the reimbursement procedures. In order for FEMA to begin processing this request, we must receive either the appropriate certification or the initial fee, forwarded to the following address: Federal Emergency Management Agency Federal Insurance Administration Office of Risk Assessment Technical Operations Division 500 C Street, S.W., Room 422 Washington, DC 20472 ATTENTION MR. CHARLES A. LINDSEY If applicable, the initial fee, in the form of a check or money order made payable to the United States Treasury, should be submitted by Registered Mail, Return Receipt Requested, within 30 days of the date of this letter. The case number referenced above should be included on your check or money order for identification purposes. Please note that the initial fee is the minimum charge for a review of this type; additional costs could be required upon completion of our review and prior to issuance of a conditional LO~Rdepending 'on the nature of the required review. You will be notified of the est/mated total processing cost if it is anticipated that, due to the extent of the review required, the total cost will exceed $1,500. In that situation, our reviewwould be suspended pending written authorization from you teproceed. 2 If you have any quest-tons concerning FEMA policy, or the National Flood Insurance progra~ in general, please call the Chief,'Natural and Technological Hazards Division of the Federal ~mergency Management Agency in Dent:on, Texas, at: (817) 898-9127, or members of our Headquarters staff in Washington, D.C., at: (202) 646-2767. ...... .Chief,. Risk Studies Division Federal Insurance Administrat:ion cc: Mr. H. Wayne Ginn, P.E. Ms. Shohre Daneshmand, Civil Engineer, City of Coppell Federal Emergency Management Ag ncY. ? Region VI, Federal Center, 800 North Loop 288 ~ Denton, Texas 76201-3698 CC. NTH October 6, 1987 Mr. Wayne Ginn, P. E. City Engineer City of Coppell Post Office Box 478 Coppell, Texas 75019 FILE COPY Dear Mr. Ginn: This letter relates to a report submitted on September gl, 1987, from PAWA-Winkelmann and Associates, Inc., to support a proposed improvement project to the City of Coppell's Andrew Brown Community Park, located within Denton Creek and Cottonwood Branch. In reviewing the report Maryetta Cunningham, Natural Hazards Program Specialist, has identified several important concerns relating to the project as submitted; these are: 1) When an adequate engineering analysis of hydrologic and hydraulic data establishes the NO IMPACT on the base flood elevations, floodway boundaries or carrying capacity would be caused by the placen~nt of the project, a submittal to the Federal Emergency Management Agency is not required; the final decision to accept the report lies with the Community. However, if the project will result in any revision to the identified flood hazard characteristics, it is necessary that a FEMA approval be obtained. 2) The report, while it states that the technical analygis establishes no effect upon "lO0-year water surface elevations or floodway widths," fails to provide any evaluation or information relating to the "Concession buildings which may also be placed, which will be floodproofeU or considered as enclosures." 3) Because of weaknesses in the City of Coppell's past administration of the provisions of its floodplain management ordinance, we feel it necessary to remind you of the requirement to address other concerns with the project; these are: a) Any project or actiVity within an identified 'floodplain must be processed through the City's permitting system to ensure that all provisions of the ordinance applicable to the specific project will be addressed; the fact that the project is a city project would not exempt it from these requirements. Mr. Wayne Ginn, P. E. b) A concession building falls within the definition of "Structure" as defined by the National Flood Insurance Program (NFIP)' regulations. Thus, if it is placed within a floodplain area it must be elevated so that the lowest floor is at or above the currently effective base flood elevation; or, it must be floodproofed in accordance with the criteria set forth in the City's ordinance and certified by a licensed professional engineer as meeting that criteria. The use of "enclosures" as provided in the report would necessitate that the specific design criteria for enclosures as set forth in the City's ordinance be incorporated and that again it be certified by a licensed professorial engineer as meeting the ordinance criteria specifically relating to enclosures. I wish to emphasize that one appropriate use for a flood hazard area would be a community park or recreational area. However, whenever buildings or other structures are placed within the floodplain, it is necessary that all floodplain management requirements be addressed. Since the technical report submitted by PAWA-Winkelmann and Associates does not involve a request for either a Conditional or Final Letter of Map Revision, it is not being forwarded to our technical review staff. However, it is this Agency's position that further supporting technical dat~ or clarification of the location of the structures is necessary before the City of Coppell can safely accept the report as sufficient documentation of "no impact on the lO0-year water surface elevation or floodway widths." Maps should be included identifying the location of both the existing floodplain and floodway boundaries, and the location of any obstruction (such as tennis court fences, etc.) or buildings must be a part of the report. For any obstruction such as tennis court fences within the regulatory floodway, design criteria must be included which will allow the City to safely verify that they would not cause any obstruction to the flow of the floodwaters. Please contact Mrs. Cunningham at 817-898-9161 if you need further assistance in this matter. Because our recent evaluation of the City's floodplain management program identified problems with past implementation and enforcement, we request that you, in your capacity as City Engineer, address the above expressed concerns and provide us with the resolutions reached. Copy to: Shohre Daneshmand City of Coppell Carl Anderson, P. E. PAWA-Winkelmann & Associates Sincerely, Alton S. Acting Chief Natural and Technological Hazards Division GINN, INC. CONSULTIN November 2, 1987 Mr. Alton S. Ray, P.E. Acting Chief, Natural and Technological Hazards Division Federal Emergency Management Agency - Region VI Federal Center 800 North Loop 288 Denton, TX 76201-3698 Re: Improvements to Andrew Brown Community Park Denton Creek Floodplain~- Coppell, TX Dear Mr. Ray: This letter is in response to your letter of October 6, 1987, relating to a report s~bmitted on September 21, 1987, to support improvements to Andrew Brown Park. 1) The engineering analysis of hydrologic and hydraulic data established that there was "NO IMPACT" on the base flood elevations, floodway boundaries, or carrying capacity by construction of the proposed improvements. We understood that FEMA approval was not needed; but, the City of Coppell considered the report necessary to make the determination that there was "NO IMPACT". The submittal to the Federal Emergency Management Agency, although not required, was done as a courtesy and indication that implementation of the floodplain management program is being provided. 2) 3) The "concession building" reference that was made in this report was an afterthought, since it is not a part of the Brown Park Improvements but, a separate project. a. This project has been processed through the City. This report is a result of City review and comments. b. The lowest floor elevation of the concession building will be 463.25 which is at or above the current effective base flood elevation of 463 ±. It does not have to be "floodproofed". We hope that this provides clarification that the structure meets the floodplain management requirements. The City of Coppell has accepted the report as sufficient documentation of "no impact on the 100-year water surface elevation or floodway width". There are no tennis court fences or buildings which will be an obstruction within the regulatory floodway. As City Engineer and floodplain administrator for the' City of Coppell, we feel we have addressed your concerns. Should you have any further questions or concerns, please contact us. Sincerely, H~. Wayne Ginn, P.E. GF/HWG/dsp cc: Maryetta Cunningham - FEMA Shohre Daneshmand - City of Coppell Carl Anderson - PAWA-Winkelmann Steve Goram - City of Coppell Alan D. Ratliff - City of Coppell Richard Diano - City of Coppell Lee Richardson - City of Coppell John Karlsruher Gabe Favre File 87365 attachment TO: SUBJECT: THE CITY WITH A BF. AUTIFUL FUTURE ,)",,/o H,~ HANDWRITTEN ~ENORANDUN FROM: ~ ]//(-~ PhdNN:~ 21 ~.W2:2 Co~ll. TCXM "101~) DATE: