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Federal Emergency Management Agency Washington, D.C. 20472 RECEIVED OCT 2 5 1999 CERTIFIED MAIL RETURN RECEIPT REQUESTED IN REPLY REFER 10: Case No.: '~9~08~391P Colorado Waler Conservation Board The Honorable Steve Ward Chairperson, Arapahoe County Board of Commissioners 5334 South Prince Street Littleton, CO 80166-0060 Community: Arapahoe County, Colorado Community No.: 080011 Panel Affected: 08005C0505 J Effective Date of 0 C T 1 9 1999 This Revision: 102-D Dear Mr. Ward: This responds to a request that the Federal Emergency Management Agency (FEMA) revise the effective Flood Insurance Rate Map (FIRM) for Arapahoe County, Colorado, and Incorporated Areas (the effective FIRM for your community), in accordance with Part 65 of the National Flood Insurance Program (NFIP) regulations. In a letter dated August 2, 1999, Ms. Ann K. Woods, P.E., Carroll & Lange, Inc., requested that FEMA revise the FIRM to show the effects of construction of the Saddle Rock Ridge development along Unnamed Creek. This request follows up on a Conditional Letter of Map Revision issued on February 2, 1998. All data required to complete our review of this request were submitted with letters from Ms. Woods. 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 delineations of the flood having a I-percent chance of being equaled or exceeded in any given year (base flood) along Unnamed Creek from the upstream limit of study to approximately 2,400 feet downstream. 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 revised reach decreased and is contained in the street and storm sewer. The modifications are shown on the enclosed annotated copy of FIRM Panel(s) 08005C0505 J. This Letter of Map Revision (LOMR) hereby revises the above-referenced panel(s) of the effective FIRM dated August 16, 1992. The modifications are effective as of 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. We will not physically revise and republish the FIRM and Flood Insurance Study (FIS) report for your community to reflect the modifications made by this LOMR at this time. When changes to the previously cited FIRM panel(s) and FIS report warrant physical revision and republication in the future, we will incorporate the modifications made by this LOMR at that time.