FLOOD05067 - Laserfiche WebLink

Home Browse Search

l '. -~ Federal Emergency Management Agency Washington, nc. 20472 CERTIFIED MAIL RETURN RECEIPT REQUESTED IN REPLY REFER TO: Case No.: 96-08-049P The Honorable Tom Davidson Mayor, City of Louisville 749 Main Street Louisville, Colorado 80027 Community: City of Louisville, Colorado Community No.: 085076 Panel Affected: 08013C0560 F Effective Date of This Revision: MAR 19 1996 102-I-A-C Dear Mayor Davidson: This is in response to a request for a revision to the effective National Flood Insurance Program (NFIP) map for your community. Specifically, this responds to a letter dated January 18, 1996, from Mr. Daniel J. Burroughs, P. E., Project Engineer, Drexel Barrell, regarding the effective Flood Insurance Rate Map (FIRM) for Boulder County, Colorado and Incorporated Areas. With his letter, Mr. Burroughs provided additional infonnation to support his November 30, 1995, request for a Letter of Map Revision (LOMR), On behalf of the Louisville Housing Authority, Mr. Burroughs requested that the Federal Emergency Management Agency (FEMA) revise the effective FIRM to incorporate the results of revised hydrologic and hydraulic analyses of unnamed flooding sources referred to locally as Drainageway A and Drainageway A-I. The revised analyses affect the area upstream of the intersection of Jefferson Avenue and Qriffith Street. From approximately 500 feet downstream of Garfield Avenue to approximately .350 feet'upstream of Garfield Avenue, Drainageway A-I follows the same alignment as Goodhue Ditch. However, Goodhue Ditch is not the source of flooding to this area. All data required to complete our review of this request were submitted with Mr. Burroughs' letters dated November 30, 1995, and January 2 and January 18, 1996, and with a letter dated February I, 1996, from Mr. Clifford R. Brockman, P.E., Vice President, Drexel Barrell. All fees necessary to process this LOMR, a total of $2,490, have been received. We have completed our review of the submitted data and the flood data shown on the effective FIRM, and have revised the FIRM to modify the elevations and floodplain boundary delineations of a flood having a I-percent chance of being equaled or exceeded in any given year (base flood) along Drainageway A and Drainageway A-I. The revised reach extends from just upstream of the intersection of Jefferson Avenue and Griffith Street to approximately 150 feet upstream of the Garfield Avenue crossing of Goodhue Ditch, The revised hydrologic and hydraulic analyses reveal that the flow splits around an area of high ground just downstream of Garfield Avenue. The split flow follows Garfield Avenue to the intersection of Garfield A venue and Griffith Street.