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<br />7.0 OTHER STUDIES <br /> <br />In April 1978, the U.S. Army Corps of Engineers completed the <br />Arkansas River Basin, Florence, Colorado, Desiqn Memorandum No.1, <br />Hydrology Part 1 (Reference 3). The purpose of this study was to <br />present basic hydrologic and hydraulic data for use in developing <br />the project plan for flood control dams on Oak and Coal Creeks and a <br />diversion dam on Chandler Creek. This study identified peak <br />discharge frequency curves for the Arkansas River and Coal, Oak, and <br />Chandler Creeks. Also included in this study, were hydraulic <br />analyses for each of the above creeks for reaches in and near the <br />City of Florence, Colorado, whereby water-surface profiles and flood <br />boundaries were delineated for the 10-, 50-, 100-, and SaG-year <br />recurrence intervals. Since none of the proposed flood control <br />plans have been constructed, none of these structures were included <br />in either the hydrologic or hydraulic analysis for this flood <br />insurance study. <br /> <br />Camp Dresser & McKee Inc., completed for the Colorado Water <br />Conservation Board, the Flood Plain Information Report for the <br />Arkansas River in Canon City, Florence and Fremont County, Colorado, <br />Volume 1 (Reference 8). The hydrologic and hydraulic data for the <br />Arkansas River contained in this report was obtained from <br />Reference 3, and re-analyzed in order to place the data in a format <br />specified by the Colorado Water Conservation Board. The data in <br />Reference 8 were then utilized to produce the water-surface profiles <br />and flood boundaries presented for the Arkansas River in the City of <br />Florence Flood Insurance Study. <br /> <br />A Flood Hazard Boundary Map has been prepared for the City of <br />Florence, dated May 17, 1974, and revised December 26, 1975 <br />(Reference 9), and was reviewed during the preparation of this flood <br />insurance study. This information was revised from approximate <br />methods to detailed methods during this flood insurance study, <br />because of the lack of orthophoto topographic mapping used in <br />Reference 8. <br /> <br />A Flood Hazard Boundary Map has been prepared for the unincorporated <br />areas of Fremont County (Reference 10). Flooding was determined <br />along a tributary to Oak Creek adjacent to Florence at the <br />westernmost corporate limit (southwest of South Houston Avenue). No <br />flood hazard was determined in this area for the City of Florence <br />Flood Hazard Boundary Map (Reference 9). The study contractor has <br />determined the tributary to Oak Creek in Fremont County to be an <br />area of minimal flood hazard. <br /> <br />This study is authori tati ve for the purposes of the National Flood <br />Insurance Program; data presented herein either supersede or are <br />compatible with all previous determinations. <br /> <br />-14- <br />