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Cambridge Phase 1-PT 940518 PROPERTY WITHIN FLOODPLAIN STATE OF TEXAS : COUNTY OF DALLAS : CiTY OF C-~P.~,u. N~E OF PS~iTTEE: ~- ~'~ /'~'f~/~'~r/'/- ~d. ~he above named permittee applied for a D~dELOPMENT PE~IT on ~/~/~ . The application has been reviewed by the ~MINIST~TOR ~d" "'~t is his determination that the proposed development IS located within identifiable flood plain of ~ The ~MINIST~TOR has reviewed plans and specifications of the ~roposed development for conformance with the development standards required COPPELL flood plain management regulations. You are hereby authorized to proceed with the following described work: on the followin~ described p~,~erty: To maintain compliance with the development st~dards of COBPELL plain manag~ent regulations and to eliminate or minimize fido4 d~age ~tential to the proposed development, you are hereby directed construct ~our proposed development in accord~ce with the following special provisions: (~For residential structures, the lowest floor (including bas~ent) must be elevated to two (2) feet above the 100-year base flood elevation. Minim~ finished floor elevations must be sho~ on the plat ~or the development as approYed by the City ~gineer. (The lowest floor must be elevated two (2) feet a~ve BFE, or one (1) foot ~ve ultimate condition whichever is higher), ) For non-residential structures, the lowest floor (includin~ bas~ent) must ~ elevated or fl~dproofed to two (2) feet a~ve the 100-year base flood elevation. Minim~ finished floor elevations must sho~ on the plat or site pl~ as appzowed by thB City ~ineez. (The lowest floor must be elevated two [2) feet a~ve B~, or one f~t a~e ultimate condition whichever is hi~her. ( ) Permittee must submit a certification from a registered professional engineer, architect, or l~d surveyor that the finished flor level of the residential structure has ~en constructed two (2) feet a~e the 100-year base flo~ e~evation, or one (1) foot abowe ultima~e condition whichever is hi~her. ( ) For non-residential floodpr~fin9, a registered professional or architect must certify that the floodproofin~ ~thods are adequate %o withs%~d the flo~ dept~s, pressures, velocities, impact uplift forces and other factors associated with the base flood. (/Fo~ fill activities, the pezmittee must su~it a certification from an engineer or land surweyor that the level of the compacted fill aterial is at or above the elevation of %he Base Flood. (~ Prowide a certified copy of all final plus or As-Built Drawings the ~INIST~TOR. Df ,/I. DOWDEY AND A$$OCIAT.'r.$, 3. OV:._ ENG NEERS 16250 DAL_AS PARKWAY SUITE ~00 DA_~AS. TEXAS 75248 (.2!4) 93~-0694 FAX (214) 931-9538 May 5, 1994 255 Parkway Boulevard Re: Hold Harmless Agreement Estates of Cambridge Manor -'-....;? ~ .'\-~--' Coppell, Texas Dear Ken: Whereas we are desiring to begin excavation of the subject tract of land (30 Ac.i). We are aware that excavation prior to final plat and construction plan approval will require the developer to hold the City harmless for any changes to the development that occur prior to final construction plan approval. Very truly William A. Anderson, P.E. ~g~; j rb Beamer Development, Inc. "the developer", agrees to the above condition of construction and will not hold the City of Coppell- responsible for changes to the plans prior to City approval. ~'~ am ,authorization representative of · / Beame~ Development, Inc.. agree to the above agreement. /" Federal Emergency Management Agency Washington. D.C. 20472 CERTIFIED MAIL IN REPLY REFER TO: RETURN RECEIPT REQUESTED Case No.~ 94-06-050R The Honorable Tom Morton Community~ City of Coppell, Texas Mayor, City of Coppell Community No.: 480170 255 Parkway Boulevard Coppell, Texas 75019 104 Dear Mayor Morton: This is in response to a letter dated February 4, 1994, from Mr. Allen J. Harts, P.E., Dan M. Dowdey and Associates, Inc., to the Federal Emergency Management Agency (FENA) regarding the effective Flood Insurance Rate Map (FIRM) for the City of Coppell, Texas. With his letter, Mr. Harts provided additional information to support a November 22, 1993, request for a Conditional Letter of Nap Revision (CLONR) from Mr. Kenneth M. Crlffln, P.E., City Engineer, City of Coppell. Mr. Criffin requested that FENA evaluate the effect that proposed fill between Cross Section 20980, a distance of approximately 1,780 feet downstream of NacArthur Boulevard, and Cross Section 21665, a distance of approximately 2,540 feet downstream of NacArthur Boulevard along Denton Creek, would have on the effective FIRM. All data required by FENA to evaluate this request v~re submitted by Mr. Criffln with his November 22 letter; by Mr. William A. Anderson, P.E., Dan Mo Dowdey and Associates, Inc., with his transmittal dated January 12, 1994; and by Mr. Uarts with his February 4 transmittal. All fees necessary to process this CLONR (a total of $1,400) have been received. We have reviewed the data submitted and the flood data used to prepare the effective FIRM for the City of Coppell. The submitted existing conditions HEC-2 hydraulic computer model, dated February 1, 1994, based on updated topographic information and additional cross sections, was used as the base conditions model in our review of the proposed conditions model for this CLOMR requeato We believe that if the proposed project is constructed as sho~n on the topographic work map entitled "Floodplain Nap, STA. 199+30 - STA. 230+00, Cambridge Manor States," prepared by Dan M. Dowdey and Associates, Inc., dated November 11, 1993, and as described in the report entitled "Flood Plain Reclamation, Denton Creek, City of Coppell, Dallas County, Texas, a revision to the FIR/4 would be warranted. The limits of fill as shown on the above plan are located in an ineffective flow area caused by backwater from Denton Creek. This area will be removed from the Special Flood Hazard Area (SFHA) after the fill has been placed and compacted. The updated topographic information, addition of new cross sections, and the proposed fill placement will result in a decrease of the SFHA along the entire reach of study. Base (100-year) flood elevations (BFEs) are increasing by a maximum of 0.06 foot. The increase in BFE is the result of a more detailed hydraulic analysis to reflect existing conditions. Upon completion of the project and receipt of the data ~isted below, we will make a final determination on revising the effective FIRM. · Detailed application and certification forms, which were used in processing this request, must be used for requesting final revisions to the maps. Therefore, when the map revision request for the area covered by this letter is submitted, each of the forms listed below must be submitted. (Copies of the forms are enclosed.) Form 1, entitled "Revision Requester and Community Official Form" Form 2, entitled "Certification by Registered Professional Engineer and/or Land Surveyor" · Please note that the National Flood Insurance Program (NFIP) is non-taxpayer funded and its expenses are paid for by policyholders. Therefore, to minimize the financial burden on the policyholders while maintaining the NFIP as self-sustaining, FEMA has implemented a procedure to recover costs associated with reviewing and processing requests for modifications to published flood information and maps. Therefore, an initial fee of $225, which represents the minimum charges associated with a request of this type, must be submitted before we can process your revision request. Payment of this fee shall be made in the form of a check or money order made payable in U.S. funds to the National Flood Insurance ProKram, or by credit card payment. The payment is to be forwarded to the following address: Federal Emergency Management Agency Revisions Fee-Collection System Administrator P.O. Box 3173 Merrifield, Virginia 22116 · As-built plans, certified by a registered professional engineer, of all proposed project elements · Certification that all fill placed in the currently effective 100- year floodplain and below the proposed BFE is compacted to 95 percent of the maximum density obtainable with the Standard Proctor Test method issued by the American Society for Testing and Materials (ASTM Standard D-698) or an acceptable equivalent method for all areas to be removed from the 100-year floodplain This response to Mr. Griffin's request is based on minimum floodplain management criteria established under the NFIP. Your community is responsible for approving all proposed floodplain development, including this request, and for assuring that the necessary permits required by Federal or State law have been received. State and community officials, based on knowledge of local conditions and in the interest of human safety, may set higher standards for construction or may limit development in floodplain areas. If the State of Texas or the City of Coppell has adopted more restrictive or comprehensive floodplain management criteria, those criteria take precedence over the minimum NFIP requirements. Should you have any questions regarding this mat~er, please contact the Division Director, Mitigation Division of FEMA in Denton, Texas, at (817) 898-5127, or Mr. Alan Johnson of our staff in Washington, DC, either by telephone at (202) 646-3403 or by facsimile at (202) 646-3445. Sincerely, ~ Michael K. Buckley, P.E., Chief Hazard Id~mtification Branch Mitigation Directorate Enclosures cc: Mr. Kenneth M. Griffin, P.E. City Engineer City of Coppell Mr. William A. Anderson, P.E. Dan M. Dowdey and Associates, Inc.