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<br />
<br />Federal Emergency Management Agency
<br />Washington, D,C. 20472
<br />
<br />JAN 11 2001
<br />
<br />CERTIFIED MAIL
<br />RETURN RECEIPT REQUESTED
<br />
<br />IN REPLY REFER TO:
<br />Case No,: 00-08-375P
<br />
<br />The Honorable Jan C, Schenck
<br />Mayor, City of Golden
<br />911 10th Street
<br />Golden, CO 80401
<br />
<br />Community: City of Golden, CO
<br />Community No.: 080090
<br />Panel Affected: 0002 A
<br />Effective Date of
<br />This Revision: ,MAY U 3 2001
<br />
<br />102-I-A-C
<br />
<br />Dear Mayor Schenck:
<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 />August 18,2000, Ms. Paula Lundquist, Design Engineer, Department of Highways and Transportation,
<br />Jefferson County, requested that FEMA revise the FIRM and FIS report to show the effects of a revised
<br />hydraulic analysis based on updated topographic information along Lena Gulch from just upstream of
<br />Orion Street to just downstream of U ,S. Highway 6 (US6). This revised hydraulic analysis affects both
<br />the City of Golden and the unincorporated areas of Jefferson County, The Special Flood Hazard Area
<br />(SFHA), the area that would be inundated by the flood having a I-percent chance of being equaled or
<br />exceeded in any given year (base flood), for the subject reach within the City of Golden is designated on
<br />the effective FIRM as Zone A, with no Base Flood Elevations (BFEs) or flood hazard factors determined,
<br />
<br />All data required to complete our review of this request were submitted with letters from Mr. Douglas P.
<br />Stewart, P,E., Project Manager, and Ms, Cara Juergensen, both with Boyle Engineering Corporation, and
<br />Ms, Lundquist.
<br />
<br />We have completed our review of the submitted data and the flood data shown on the effective FIRM
<br />and FIS report, We have revised the FIRM and FIS report to establish BFEs and to modify the SFHA
<br />boundary delineations along Lena Gulch from approximately 4,000 feet downstream to approximately
<br />1,900 feet downstream ofUS6, As a result of the modifications, the width of the SFHA increased in
<br />some areas and decreased in other areas, In the southern overbank area of the main channel, a divided
<br />flowpath exists south of Lena Gulch from approximately 3,600 feet downstream to approximately
<br />1,800 feet downstream ofUS6, This area, Lena Gulch Overflow, has been designated Zone AH, an
<br />SFHA subject to shallow base flooding with depths between I foot and 3 feet and BFEs determined, The
<br />modifications are shown on the enclosed annotated copy of FIRM Panel 0002 A. Profile Panels 29P(a),
<br />29P(b), and 29P(c) have been added to the effective FIS report. For informational purposes, adjacent
<br />portions of Lena Gulch within the unincorporated areas of Jefferson County are shown on the profile
<br />panels for the City of Golden. This Letter of Map Revision (LOMR) hereby revises the
<br />above-referenced panel of the effective FIRM dated May IS, 1985, and the affected portions of the FIS
<br />report dated November IS, 1984.
<br />
<br />..- ---,
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