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..," Federal Emergency Management Agency Washington, D.C. 20472 CERTIFIED MAIL RETURN RECEIPT REQUESTED IN REPLY REFER TO: Case No.: 00-08-403P The Honorable Michelle Lawrence Chairperson, Jefferson County Board of Commissioners 100 Jefferson County Parkway, Suite 5550 Golden, CO 80419 Community: Jefferson County, CO Community No.: 080087 Panel Affected: 0290 B Ef~ective.~ate of JAN 3 0 2001 ThIS RevlSlon: I02-I-A-C Dear Ms. Lawrence: 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 of the National Flood Insurance Program (NFIP) regulations. In a letter dated September 8, 2000, Mr. Brad Sheehan, Development Review Coordinator, Planning & Zoning, Jefferson County, requested that FEMA revise the FIRM and FIS report to show the effects of a channel improvement project along Weaver Creek from just upstream of South Oak Street to just downstream of the Warrior Canal crossing. The project consisted of grading, bank stabilization, construction of a detention pond along the west bank of Weaver Creek approximately 70 feet upstream of South Oak Street, and construction of bridge abutments for an unnamed roadway approximately 400 feet downstream ofthe Warrior Canal crossing. The Special Flood Hazard Area (SFHA), the area that would be inundated by the flood having a 1-percen1 chance of being equaled or exceeded in any given year (base flood), for the subject reach is designated on the effective FIRM as Zone A2, an SFHA with Base Flood Elevations (BFEs) and flood hazard factors determined. This request follows up on a Conditional Letter of Map Revision issued on October 31, 1997. All data required to complete our review of this request were submitted with letters from Mr. Kevin Roth, Project Engineer, Kirkham Michael Consulting Engineers; Mr. David Mallory, P.E., Project Engineer, Floodplain Management Program, Urban Drainage and Flood Control District; and Mr. Sheehan. We have completed our review of the submitted data and the flood data shown on the effective FIRM and FIS report. We have revised the FIRM and FIS report to modifY the elevations and floodplain boundary delineations of the base flood along Weaver Creek from just upstream of South Oak Street to just downstream of the Warrior Canal crossing. As a result of the modifications, the BFEs for Weaver Creek increased in some areas and decreased in other areas, and the width of the SFHA decreased. All increases in BFE are contained in the channel. The modifications are shown on the enclosed annotated copies of FIRM Panel 0290 B and Profile Panels 443P and 444P. This Letter of Map Revision (LOMR) hereby revises the above-referenced panel of the effective FIRM dated August 5,1986, and the affected portions of the FIS report dated July 4,1989.