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<br />" <br /> <br /> <br />Federal Emergency Management Agency <br />Washington, D,C, 20472 <br /> <br />CERTIFIED MAIL <br />RETURN RECEIPT REQUESTED <br /> <br />IN REPLY REFER TO: <br />Case No,: ~~1.Q~;-36$,P <br /> <br />The Honorable Michelle Lawrence <br />Chairperson, Jefferson County <br />Board of Commissioners <br />100 Jefferson County Parkway, Suite 5550 <br />Golden, CO 80419 <br /> <br />Community: Jefferson County, Colorado <br />Community No,: 080087 <br />Panel Affected: 0165 B <br />Effective Date of DEe 22 1999 <br />This Revision: <br /> <br />102-I-A-C <br /> <br />Dear Ms. Lawrence: <br /> <br />This responds to a request that the Federal Emergency Management Agency (FEMA) revise the effective <br />Flood Insurance Rate Map (FIRM) and Flood Insurance Study (FIS) report for your community in <br />accordance with Part 65 of the National Flood Insurance Program (NFIP) regulations. In a letter dated <br />July 9, 1999, Mr, Joe DeCrescentis, Civil Engineer - Development Analysis, Planning and Zoning, <br />Jefferson County, requested that FEMA revise the FIRM and FIS report to show the effects of <br />channelization of Van Bibber Creek from Dunraven Street to approximately 450 feet upstream of EI Diente <br />Street, construction of a 26-foot by 6-foot reinforced-concrete box culvert at E1 Diente Street, and more <br />detailed topographic information to reflect existing watershed conditions along the studied reach, This <br />request follows up on a Conditional Letter of Map Revision issued on September 28, 1998, <br /> <br />All data required to complete our review of this request were submitted with letters from Mr, David <br />Mallory, P,E" Project Engineer, Floodplain Management Program, Urban Drainage and Flood Control <br />District; Ms, Vera Stepanek, P.E" Rocky Mountain Consultants, Inc.; and Mr. DeCrescentis, <br /> <br />We have completed our review of the submitted data and the flood data shown on the effective FIRM and <br />FIS report, We have revised the FIRM and FIS report to modify the elevations and floodplain boundary <br />delineations of the flood having a I-percent chance of being equaled or exceeded in any given year (base <br />flood) along Van Bibber Creek from just downstream of Dunraven Street to approximately 500 feet <br />upstream of EI Diente Street. As a result of the modifications, the base flood elevations (BFEs) for Van <br />Bibber Creek increased in some areas and decreased in other areas, and the width of the Special Flood <br />Hazard Area (SFHA), the area that would be inundated by the base flood, decreased, All increases in BFE <br />are a result of more detailed topographic information, and no insurable structures are affected, The <br />modifications are shown on the enclosed annotated copies of FIRM Panel(s) 0165 B and Profile <br />Panel(s) 422P and 423P, This Letter of Map Revision (LOMR) hereby revises the above-referenced <br />panel(s) of the effective FIRM dated August 5. 1986, and the affected portions of the FIS report dated <br />July 4, 1989, <br /> <br />The modifications are effective as of the date shown above, The map panel(s) as listed above and as <br />modified by this letter will be used for all flood insurance policies and renewals issued for your community, <br />