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<br />., <br /> <br />8 <br /> <br /> <br />. <br /> <br /> <br />COLORADO WATER .... <br /> <br />AuguSt 1999 <br /> <br />. HMR 44 -1970 Site-Specific PMP for Chatfield Dam applied to Cherry Creek basin, Developed by the NWS, <br /> <br />. HMR 55A - NWS Generalized Regional Report published in 1988 for the area between the Continental Divide and the 103'" <br />Meridian, <br /> <br />. Site-Specific -1995 analysis specifically for Cherry Creek basin. Developed by the NWS, <br /> <br /> <br />The construction of dry dams, which hold <br />water only during flooding, was the most <br />controversial and expensive of the proposed <br />upgrades, estimated to cost about $140 <br />million. Six locations were identified, <br />including one at the site of the old <br />Castlewood Dam, which breached in 1933, <br />The dry dams, if constructed, would have <br />displaced dozens of residents. Residents <br />urged the Corps to consider other options, <br />such as building several smaller retention <br />areas, widening Cherry Creek, or restoring <br />the old Castlewood Canyon Dam, A concern <br />was that a number of historic ranches and <br />structures would be threatened by the <br />project. <br /> <br />In a June 22, 1999 letter to interested parties, Kenneth S. Cooper, Deputy District Engineer at the Corps' Omaha District Office, <br />said the preliminary screening of Cherry Creek Dam had been completed and only the following alternatives would be considered <br />fumer: <br /> <br />The Corps had studied three fixes for the dam <br />. so it could handle the probable maximum <br />flood: <br /> <br />. Raise it by 15 feet; <br />. Raise it by nine feet and add a second <br />spillway, or <br />. Raise it by seven feet and add a dry dam <br />upstream, <br /> <br />. <br /> <br />-....r= <br />.,....- ~. <br /> <br /> <br />Cherry Creek Basin (photo courtesy of Corps of Engineers Omaluz Office) <br />