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<br />RECONNAISSANCE REPORT <br />CHERRY CREEK LAKE, COLORADO <br />HYDROLOGIC IMPROVEMENT ASSESSMENT <br /> <br />STUDY AUTHORITY <br /> <br />This study is conducted under tl1e Cc)rps of Engineel:."s Dam Safety Assurance <br /> <br />Program. Guidance for this program is provided under ER 1130-2-417, "Major <br /> <br />Rehabilitation Program and Dam Safet)' Pr()gram." 30 November 1980. <br /> <br />PROJECT AUTHORITY <br /> <br />The Cherry Creek Lake project was authorized by Public Law 227, 77th <br /> <br /> <br />Congress, 1st Session, on 18 August 1941. TIle original compr..hensive plan, as <br /> <br />authorized, was published as House Pocument 426, 76th Congress, 1st Session. <br /> <br />Additional funding was authorized in ]'ubl1.c La,., 534, 78th Congress, 2nd Session, <br /> <br />22 December 1944. <br /> <br />STUDY PURPOSE AND SCOPE <br /> <br />The purpose of this study is to det_ermi.ne what aCl:ions are necessary to <br /> <br />bring Cherry Creek in compliance witll current dam safety criteria. It is the <br /> <br /> <br />prac tice of the Corps of Engineers to des :lgn high hazard dams and their <br /> <br />appurtenant works to accommodate the largest flood tha,t a particular drainage <br /> <br />basin may be reasonably expected to produce. 1111.s design flood is based on a <br /> <br />probable ma"imum flood (PMF) derived from the probable maximum precipitation <br /> <br /> <br />(pMP) estimates developed by the National lIeather Service, <br /> <br />The National lIeather Service, the Corps of Engineers, the Bureau of <br /> <br />Reclamation, and the Soil Conservation Service conducted a major study of extreme <br />