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<br /> <br />/. <br />/' <br /> <br />( <br />CDM " <br /> <br />C <br />CAMP DRESSER &. McKEE iNd. <br /> <br />environmentaf enginaers, scienrists, <br />planners, & '!Ianagemenl Co(/sultan!s <br /> <br />Writer's Tower. Suite 1100 <br />1660 South Albion Streal. Denver. Coiorado 80222 <br />303758-4351 <br /> <br />Narch 9, 1981 <br /> <br />Mr. Gene Jencsok <br />Co 1 orado l'later Conservation 'Board <br />Department of Natural Resources <br />823 State Centennial Building <br />1313 Sherman Street <br />Denver, CO 80203 <br /> <br />Dear Gene, <br /> <br />CDM has completed. a review of the Corps of Engineers (COE) hydrologic <br />analysis for the Arkansas River in Fremont County~ (Floodplain Inform- <br />ation Report for Florence, CO, April, 1978). The CaE hydrology <br />analysis was performed using expected probability. For the gage at <br />Canon City, CD~1 performed a regional gage analysis, Ivhich fell <br />within the 90% confidence limits of the CaE discharges. The results <br />are summarized below: <br /> <br /> - Peak; Di.scharges Lcfs) <br />Stream Study 10-yr. 50-yr. lOa-yr. 500-.vr. <br />- Arkansas CaE 8850 16,500 20,500 32,200 <br /> @ Canon City <br /> CD~1 8400 12,800 15,000 22,000 <br />@ Florence CaE 11 ,000 21,000 28,000 71, 000 <br /> <br />Based upon this review, the 10, 50, 100 and 500-year COE discharges are <br />recommended for use in the Floodplain Information Report for Fre~ont <br />County and Canon City. <br /> <br />If you have any questions please contact the writer or Rich Wray. <br /> <br />Very truly yours, <br /> <br />CAMP DRESSER & McKEE INC. <br /> <br />Paul A. Hindman <br />Project Engineer <br /> <br />cc: John Liou <br /> <br />PAH/sw <br />