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0i4~ Federal Emergency Management Agency Washington, D.C. 20472 CERTIFIED HAIL RETURN RECEIPT REQUESTED IN REPLY REFER TO: Case No.: 9.~'"li8,;iilr9P Mr. Buckey Arbaney Chairman, Garfield County Board of Commissioners 109 Eighth Street, Suite 303 G1enwood Springs, Colorado 81601 Community: Garfield County, Colorado Community No.: 080205 Panels Affected: 1465 Band 1465 Effective Date of This Revision: JUH 0 8 J994 102-I-A Dear Mr. Arbaney: This is in response to a request for a revision to the effective Flood Insurance Study (FIS) and National Flood Insurance Program (NFIP) map for your community. Specifically, this responds to a letter from Mr. Mark L. Bean, Director, Building and Planning, Garfield County Regulatory Offices and Personnel, dated June 22, 1993, regarding the effective FIS report, Flood Insurance Rate Map (FIRM), and Flood Boundary and F100dway Map (FBFM) for the unincorporated areas of Garfield County, Colorado. Mr. Bean requested that we revise the effective FIRM and FBFM to show the effects of more detailed topographic information along the Roaring Fork River. All data required to complete our review of this request were submitted with transmittals from Mr. Jeffery S. Simonson, P.E., Schmueser Gordon Meyer, Inc., dated January 25, February 25, and March 17, 1994. Because this Letter of Map Revision (LOMa) solely incorporates more detailed topographic information, fees were not assessed for the review. We have completed our review of the submitted data and the flood data shown on the effective FIRM and FBFM, and have revised the FIRM and FBFM to modify the elevations and f100dway boundary delineations of a flood having a 1-percent probability of being equaled or exceeded in any given year (base flood) along the Roaring Fork River, from approximately 2,000 to 10,800 feet upstream of the confluence of Cattle Creek. As a result of this LOMa, the base (100-year) flood elevations (BFEs) change, ranging from a decrease of 0.4 foot, at approximately 4,670 feet upstream of the confluence of Cattle Creek, to an increase of 0.6 foot, at approximately 6,020 feet upstream of the confluence of Cattle Creek. The maximum increase occurs at effective Cross Section BB, which is the only location where the change to the water-surface elevation is greater than 0.5 foot. The f100dway width changes, ranging from a decrease of 5 feet to an increase of 1 foot. However, there are no changes to the Special Flood Hazard Area.