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<br />DESCRIPTION OF BASIN <br /> <br />o <br />Q') <br />....:t <br />"'-1 <br /> <br />Lake Mead provides most of the storage and regulation in the Lower <br />Colorado River Basin with the water being stored for irrigation and <br />municipal and industrial uses, generation of electrical power, and other <br />beneficial uses. <br /> <br />. <br /> <br />Lake MOhave, the reservoir formed by Davis Dam, backs water at high <br />stages about 67 miles upstream to the tailrace of Hoover Powerplant. <br />storage in Lake Mohave is used for some reregulation of releases from <br />Hoover Dan, for meeting treaty requirements with Mexico, and for devel- <br />oping power head for the production of electrical energy at Davis Power- <br />plant. <br /> <br />Tae river flows through a natural channel for about 10 miles below <br />Davis Dam at which point the river enters the broad Mohave Valley 33 <br />miles above the upper end of Lake Havasu. <br /> <br />Lake Havasu backs up behind Parker Dam for about 45 miles and cov- <br />ers about 25,000 acres. Lake Havasu serves as a forebay from which the <br />Metropolitan Water District of Southern California p~s water into the <br />Colorado River Aq~educt. Lake Havasu also controls floods originating <br />below Davis Dam. <br /> <br />Headgate Rock Dam, Palo Verde Diversion Dam, and Imperial Dam all <br />serve as diversio~ structures with practically no storage. Imperial Dam, <br />located some 150 miles downstream from Pa~ker Dan, is the major diver- <br />sion structure to irrigation projects in the Imperial Valley and YIL'll8 <br />areas. It diverts water on the right bank to the All American Canal <br />which delivers water to the YIL'll8 project in Arizona and California and <br />Imperial and Coachella Valleys in California. It diverts on the left <br />bank to the Gila Gravity Main Canal. <br /> <br />The Senator Wash Dam also affords regulation in the vicinity of <br />Imperial Da~ and assists in the delivery of water to Mexico. <br /> <br />11 <br /> <br />