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Federal Emergency Management Agency Washington, D.C. 20472 ~ nECEIVED JAN 28 2003 FES 03 2003 CERTIFIED MAIL RETURN RECEIPT REQUESTED IN REPLY REFER TO: Case No.: 02-08-499P Colorado Water Conservation Board The Honorable Ray Martinez Mayor, City of Fort Collins P.O. Box 580 Fort Collins, CO 80522-0580 Community: City of Fort Collins, CO Community No.: 080102 Panel Affected: 0008 C Ef~ective.~ate of MAY 22 2003 ThIs RevIsIOn: 102-I-A-C Dear Mayor Martinez: This responds to a request that the Federal Emergency Management Agency (FEMA) revise the effective Flood Insurance Rate Map (FIRM) and Flood Insurance Study (FIS) report for your community in accordance with Part 65 ofthe National Flood Insurance Program (NFIP) regulations. In a letter dated August 9, 2002, Mr. Chris J. Pauley, Senior Engineer, Anderson Consulting Engineers, Inc., requested that FEMA revise the FIRM and FIS report to show the effects of a project along Cooper Slough. The project consisted of widening of Vine Driye and construction of two 42-inch.diameter pipe culverts along Cooper Slough at Vine Drive; a conveyance channel for Boxelder Creek overflows from Interstate Highway 25 (1-25) to approximately the confluence with Cooper Slough just north of Vine Drive; a floodwall along the north side of Vine Drive and south of the conveyance channel from approximately 600 feet westto approximately 1,100 feet west ofI-25; and Waterglen Drive with two 3-foot by 25-foot box culverts under Waterglen Drive approximately 1,100 feet west ofI-25. This request follows up on a Conditional Letter of Map Revision issued on June 25, 1999. All data required to complete our review of this request were submitted with letters from Mr. Pauley. We have completed our review of the submitted data and the flood data shown on the effective FIRM and in the effective FIS report. We have revised the FIRM and FIS report to modify the elevations and floodplain and floodway boundary delineations ofthe flood having a I-percent chance of being equaled or exceeded in any given year (base flood) along the revised reach of Cooper Slough. As a result of the modifications, Base Flood Elevations (BFEs) for Cooper Slough were established just upstream of Vine Drive; the BFEs approximately 80 feet downstream of the widened Vine Driye decreased; the Special Flood Hazard Area (SFHA), the area that would be inundated by the base flood, was extended to just upstream of Vine Drive; and a portion of the effective regulatory floodway was removed from its previous limit just downstream of old (unwidened) Vine Drive to approximately 30 feet downstream of Vine Drive. (Please note that revised, annotated FIRM Panel 0008 C shows the centerline ofthe widened Vine Drive.) In addition, the corporate boundary ofthe City of Fort Collins shown on the FIRM was corrected in the vicinity of the project area. The modifications are shown on the enclosed annotated copies of FIRM Panel 0008 C, Profile Panel 33P, and affected portions ofthe Floodway Data Table. This Letter of Map Revision (LOMR) hereby revises the above-referenced panel of the effective FIRM and the affected portions of the FIS report, both dated March 18, 1996. The modifications are effective as of the date shown above. The map panel listed above and as modified by this letter will be used for all flood insurance policies and renewals issued for your community.