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'-liS Federal Emergency Management Agency Washington, D.C. 20472 Rr.-,,,",_ FEB 0 8 2000 . .... '':fll~O ff:t? I ~ C . cOOO Co c'<";'-'1,;~ l)se.... ..; ,. . VijliOn ~'i.."~ Grd IN REPLY REFER TO: Case No.: 00-08-073P CERTIFIED MAIL RETURN RECEIPT REQUESTED Mr. John L. Klomp Chairman, Board of County Commissioners Pueblo County 215 West lOth Street Pueblo, CO 81003 . Community: Pueblo County, Colorado Community No.: 080147 Panels Affected: 0275 B, 0360 B, and 0380 B E~ective.~ate of MAR 08 2000 This ReVISion: 102-I-C Dear Mr. Klomp: This Letter of Map Revision (LOMR) follows up on our letter dated January 4,2000, to Mr. Kim B. Headley, Director, Department of Planning and Development, Pueblo County, concerning his 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 the January 4 letter, we stated that we were in the process of reviewing all available backup data associated with the Special Flood Hazard Area (SFHA), the area that would be inundated by the flood having a I-percent chance of being equaled or exceeded in any given year (base flood), along U.S. Highway 50 from Six Mile Creek to Pueblo County High School (just west of 36th Lane) that is designated Zone A on the effective FIRM. We further stated that we would use the best available data to perform hydrologic and hydraulic analyses to revise the SFHA boundary delineations. We have completed our review of the available data. Using the best available topographic data in conjunction with a hydrologic analysis based on regional regression equations and a hydraulic analysis based on the QUlCK-2 computer program, we determined approximate SFHA boundary delineations for this area. We have revised the FIRM to modify the floodplain boundary delineations and zone designations of the base flood along an unnamed tributary to Six Mile Creek (unnamed tributary) from the confluence with Six Mile Creek to approximately 5,000 feet upstream of 36th Lane. As a result of the modifications, the width of the SFHA for the unnamed tributary increased in some areas and decreased in other areas. The zone designation of the SFHA from approximately 8,000 feet upstream of the confluence of the unnamed tributary with Six Mile Creek to approximately 5,000 feet upstream of 36th Lane was changed to Zone X (shaded), an area outside the SFHA that is subject to shallow base flooding ofless than 1.0 foot. The modifications are shown on the enclosed annotated copies of FIRM Panel(s) 0275 B, 0360 B, and 0380 B. This LOMR hereby revises the above-referenced panel(s) of the effective FIRM dated September 29, 1989. The modifications will become effective 30 days after the date shown above. The map panel(s) 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. The determination made by this LOMR was based on the best data available to FEMA. If your community possesses data that will help us arrive at a better determination, we strongly encourage your community to submit such data.