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<br />COLORADO WATER CONSERVATION BOARD <br />823 state centennial Building <br />1313 Sherman street <br />Denver. Colorado 80203 <br /> <br />M E M 0 RAN 0 U M <br /> <br />TO: <br /> <br />Larry F. Lang, Chief, Flood Control & Conservation Section <br /> <br />FROM:'~~' E. J. Van Camp, Water Resource Specialist <br />DATE: October 6, 1977 <br /> <br />SUBJECT: <br /> <br />Review of Flooding Conditions, Evaluation and Recommenda~ions <br /> <br />Re: <br /> <br />Clear Creek, Georgetown, Colorado from the 6th Street <br />Bridge to 7th Street, with no existing crossing <br /> <br />Ref: <br /> <br />Flood threat to area behind post office, fronting Argentine <br />Street, between 6th and 7th streets adjacent Clear.Creek. <br /> <br />a follow up <br />with regard <br />area. <br /> <br />This evaluation of the particular area's flood hazards is <br />of a meeting August 4, 1977 with Georgetown administrators <br />to existing flood hazards to a "structural" use of the <br /> <br />My on-site examination of Clear Creek and the adjoining <br />flood prone area's terrain and surface conditions indicated on- <br />ground surveyed cross sections would be necessary to estimate any <br />'effects of flooding pertinent to the particular area behind the <br />post office. <br /> <br />The cross section locations' were furnlshed to the adminis- <br />trators by means of street location in the vicinity with cross section <br />intervals shown on a drawing of I." to 50 I scale. <br /> <br />Field notes of these surveyed cross sections were furnished <br />us September 12, 1977 with a comparable sketch map showing their <br />pertinent measurements and locations. <br /> <br />My analysis for estimates of the area~ existing flooding <br />conditions behind the post office building indicated its existing <br />flood threat is not significant, limited to a one-hundred year flow <br />within a range of 2500 to 3000 cfs (cubic feet per second). Pro- <br />tective measures for first floor elevations of a "structural" use <br />can readily be applied by requiring the floor elevation to be set <br />not less than 1.0 feet above the top of the adjacent timber-walled <br />channel. <br />