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<br />~' <br /><, <br /> <br />UNITED STATES DEf. .RTMENT OF AGRICULTURE <br />SOIL CONSERVATION SERVICE <br />P. O. Box 17107, Denver, 00 80217 <br /> <br />SUBJECT. Sand Creek and Jimmy Camp Flood Hazard Studies <br /> <br />DATE, March 17, 1978 <br /> <br />TO, <br /> <br />Gene Jensock <br />Flood Control & Conservation <br />Section <br />823 State Centennial Building <br />1313 Sherman Street <br />Denver, 00 80203 <br /> <br />~~)~J~~~?~ml <br />C MAR 20 1978 ,::' <br />, , 10') <br />'- <br />b~\, ,_ ,__.___..u.____../ ' <br />.-.C'OLO~;vATG-t <br />CONSERVATION BOARD <br /> <br />',t <br />i!i <br /> <br />" <br />ir <br /> <br />As follow-up to our recent meeting with the FIA and Army Corps of <br />Engineers, we have reviewed our work on the subject studies. The CSM <br />rates on Jimmy Camp Creek are significantly higher than on Sand Creek. <br />The reason for this is related to hydraulic soil cover complex differences. <br />Curve numbers on Jimmy Camp Creek are 4 to 5 points higher which results <br />from a greater percent of soils in the liD" soil group. It is our <br />conclusion that the flows developed in these studies are correct for <br />the procedure used, If the studies were to be re-worked today by the <br />SCS Hydrology procedures, we would get similar answers. <br /> <br />~ <br /> <br />We have hydrologic soil cover complex (CN) maps in our files if anyone <br />would like to review them. <br /> <br />Please let us know if we can be of further assistance. <br /> <br />::;x/x:LC. Cr ~ <br />S. Glade Wilkes <br />Hydraulic Engineer <br /> <br />~ <br /> <br /> <br />cc: Wayne Smith, Civil Engineer, Denver <br />J. P. Thornton, Staff Leader, RB/WS PIng, Denver <br />