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.. Federal Emergency Management Agency. Washington, D.C. 20472 CERTIFIED MAIL RETURN RECEIPT REQUESTED IN REPLY REFER TO: Case No,: 99-08c231P The Honorable Tom Davidson Mayor, City of Louisville 749 Main Street Louisville, CO 80027 Community: City of Louisville, Colorado Community No,: 085076 Panels Affected: 08013C0560 F and 0576 G Effective Date of J AN 1 9 2000 This Revision: 102-I-A-C Dear Mayor Davidson: This responds to a request that the Federal Emergency Management Agency (FEMA) revise the effective Flood Insurance Rate Map (FIRM) for Boulder 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 March 26, 1999, Mr, Daniel J, Burroughs, P,E" Project Manager, Drexel Barrell & Co" requested that FEMA revise the FIRM to show the effects of construction of a detention pond at Middle School Park and installation of approximately 2,600 linear feet of 5-foot-diameter reinforced-concrete pipe culvert from Middle School Park to an outfall point on the east side of State Highway 42, just south of where Short Street terminates, This request follows up on a Conditional Letter of Map Revision issued on December 9, 1997, All data required to complete our review of this request were submitted with letters from Mr, Burroughs, 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 elevations and floodplain boundary delineations of the flood having a I-percent chance of being equaled or exceeded in any given year (base flood) along an unnamed flooding source locally known as Drainageway A. As a result of the modifications, the base flood elevations (BFEs) for Drainageway A increased in some areas, decreased in some areas, and were removed in other areas, The width of the Special Flood Hazard Area (SFHA), the area that would be inundated by the base flood, increased in some areas and decreased in other areas, and the SFHA from the Burlington Northern Railway to Jefferson Avenue was removed from the FIRM, All increases in BFE are contained within the detention pond, The modifications are shown on the enclosed annotated copies of FIRM Panel(s) 08013C0560 F and 08013C0576 G, This Letter of Map Revision (LOMR) hereby revises effective FIRM Panel 08013C0560 F dated June 2, 1995, and FIRM Panel 08013C0576 G dated May 6, 1996, This revision request also affects the City of Lafayette and the unincorporated areas of Boulder County, Separate LOMRs are not being issued for those communities because the changes within those communities are limited to the delineation of a flood hazard area designated Zone X (shaded), an area that would be inundated by the base flood with average base flood depths of less than 1 foot.