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Federal Emergency Management Agency Washington, D.C. 20472 CERTIFIED MAIL RETURN RECEIPT REQUESTED IN REPLY REFER TO: Case No.: 01-08-412P The Honorable Susan Thornton Mayor, City of Littleton 2255 West Berry Avenue Littleton, CO 80165 Community: City of Littleton, CO 'community No.: 080017 Panels Affected: 0005 D Effective Date of APR 1 2 2002 This Revision: 102- D Dear Mayor Thornton: This responds to a request that the Federal Emergency Management Agency (FEMA) revise the effective Flood Insurance Rate Map (FIRM) for your community in accordance with Part 65 of the National Flood Insurance Program (NFIP) regulations. In a report of August 2001, Mr. Jasper L. Herrera, P.E., HCL Engineering & Surveying, LLC, requested that FEMA revise the FIRM to show the effects of the channelization of the SJCD 6200 North Tributary from the confluence with SJCD 6200 to Platte Canyon Road. This request follows up on a Conditional Letter of Map Revision issued on January 5, 1999 (Case No. 98-08-382R). All data required to complete our review of this request were submitted with letters from Mr. Robert R. Gabriel, P.E., HCL Engineering & Surveying, LLC and Mr. Herrera. We have completed our review of the submitted data and the flood data shown on the effective FIRM. We have revised the FIRM to modify the floodplain boundary delineation and zone designation of the flood having a I-percent chance of being equaled or exceeded in any given year (base flood) along the SJCD 6200 North Tributary from just downstream of Nevada Ditch to just upstream of Platte Canyon Road. As a result of the modifications, the width of the Special Flood Hazard Area (SFHA), the area that would be inundated by the base flood, for the SJCD 6200 North Tributary decreased. The revised SFHA is contained in the design channel and designated as Zone A, area for which base flood elevations have not been determined. The modifications are shown on the enclosed annotated copy of FIRM Panel 0800170005 D. This Letter of Map Revision (LOMR) hereby revises the above-referenced panel of the effective FIRM, dated September 29, 1989. The modifications are effective as of the date shown above. The map panels as listed above and as modified by this letter will be used for all flood insurance policies and renewals issued for your community. A review of the determination made by this LOMR and any requests to alter this determination should be made within 30 days. Any request to alter the determination must be based on scientific or technical data.