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.. r,_"" NATIONAL FLOOD INSURANCE PROGRAM FEMA MAP COORDINATION CONTRACTOR flEe EIVEO APR 1 .1 2003 IN REPLY REFER TO: CoIa/MoWat.rcon. Case No.: 03-08-0332R selVatlon Board Community: City of Colorado Springs, CO Community No.: 080060 April 4, 2003 Mr. Roger G. Berge, P.E., P,L.S, Berge-Brewer & Associates 711 North Cascade Avenue Colorado Springs, CO 80903 316-ACK.FRQ Dear Mr. Berge: This responds to your request dated March 21,2003, that the Federal Emergency Management Agency (FEMA) issue a conditional revision to the Flood Insurance Rate Map (FIRM) for EI Paso County, Colorado and Incorporated Areas. Pertinent information about the request is listed below, Identifier: Troy Hill Flooding Source: Sand Creek Center Tributary FIRM Panel(s) Affected: 08041C0753 F We have completed an inventory of the items that you submitted. The items identified below are required before we can begin a detailed review of your request. I. Based on your submitted information, it appears that new structures (i.e., bridges) have been constructed and new conditions exist along Sand Creek Center Tributary since the effective date of the FIRM. Please submit an existing conditions model, both in hard copy and digital format, for Sand Creek Center Tributary, ensuring that the existing conditions model ties into the effective information within 0.5 foot, or within 0.0 feet if practical, at the upstream and downstream tie-in locations. 2. Paragraph 65.6(a)(2) of the National Flood Insurance Program (NFIP) regulations states that to avoid discontinuities between revised and unrevised flood data, hydraulic analyses must have a logical transition between revised elevations of the flood having a I-percent chance of being equaled or exceeded in any given year (base flood) and those developed previously for areas not affected by the revision. Please ensure that the proposed conditions hydraulic analysis for Sand Creek Center Tributary ties into the existing conditions hydraulic analysis within 0,5 foot, or within 0.0 feet if practical, at both the downstream and upstream ends of the proposed revised reach. If the proposed conditions model does not tie into the existing conditions model within 0.5 foot at the upstream and downstream ends of the proposed revised reach, please revise the proposed conditions model to do so. 3. A regulatory floodway is shown on the effective FIRM for Sand Creek Center Tributary. Please submit digital files and hard copies of the proposed conditions floodway models. 4. Please indicate the vertical datum used for the topographic information shown on the work map entitled "Troy Hill / Sand Creek Center Tributary Plan View Topographic Map for FEMA CLOMR Submittal" prepared by your finn, dated January 11, 2003. 3601 Eisenhower Avenue, Alexandria, Virginia 2230+6425 PH: 103.960.8800 FX: 103.960.9125 Mlchaol Bakor Jr., Inc., undor contract with tho FEDERAL EMERGENCY MANAGEMENT AGENCY, Is a Map Coordination Contractor for tho National Flood Insuranco Program