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282-. Federal Emergency Management Agency Washington, D.C. 204-72 CERTIFIED MAIL RETURN RECEIPT REQUESTED IN REPLY REFER TO: Case No.: \l2c9t.08;;OOlF~ The Honorable Michelle Lawrence Chairperson, Jefferson County Board of Commissioners 100 Jefferson County Parkway, Suite 5550 Golden, Colorado 80419 Community: VeffersonCounty,Colorado Community No.: 080087 Panels Affected: '0165 B'ilnd 0170 B } Effective Date of 0 E C 0 3 1998 This Revision: 102-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 10, 1998, Mr. Brad Sheehan, Development Review Coordinator, Planning and Zoning, Jefferson County, requested that FEMA revise the FIRM and FIS report to show the effects of realignment of Church Ditch, placement of fill, and installation of culverts. Church Ditch was shifted approxinoately 300 feet east of its original intersection with Van Bibber Creek Tributary. Fill was placed along Van Bibber Creek Tributary from approxinoately 1,800 feet downstream to approxinoately 900 feet downstream of Ulysses Street. Two 6-foot-by-lO-foot reinforced-concrete box culverts were installed along Van Bibber Creek Tributary under the realigned Church Ditch crossing. This request follows up on a Conditional Letter of Map Revision issued on February 15, 1996. All data required to complete our review of this request were submitted with letters from Mr. Ed Jennings, P.E., P.L.S., 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 flood having a I-percent chance of being equaled or exceeded in any given year (base flood) along the revised reach of Van Bibber Creek Tributary from approxinoately 2,300 feet downstream to approxinoately 300 feet downstream of Ulysses Street. As a result of the modifications, the base flood elevations (BFEs) for the revised reach increased, and 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. No insurable structures are affected by the increases in BFE or SFHA width. The modifications are shown on the enclosed annotated copies of FIRM Panel(s) 0165 B and 0170 B and Profile Panel(s) 430P and 431P. This Letter of Map Revision (LOMR) hereby revises the above-referenced panel(s) of the effective FIRM dated August 5, 1986, and the affected portions of the FIS report dated July 4, 1989. 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.