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<br />;0'01367 <br /> <br />. <br /> <br />. <br /> <br />, . <br /> <br />capability of Hoover Dam (73,000 cfs without use of the <br /> <br /> <br />spillways). After 1963, with the completion of Glen Canyon <br /> <br /> <br />Dam, and until 1980, all streamflow in excess of downstream <br /> <br /> <br />consumptive use requirements was retained to fill Lake <br /> <br /> <br />Powell's vacant storage capaci"ty. <br /> <br /> <br />With the filling of Lake Powell in 1980, releases in <br /> <br /> <br />excess of downstream delivery requirements were made from <br /> <br /> <br />Hoover Dam but the peak rate only reached about 21,000 cfs <br /> <br /> <br />until 1983. However, with the currently-filled condition of <br /> <br /> <br />the reservoirs, and with the consumptive uses of the basin <br /> <br /> <br />states approaching the average annual flow (which increases <br /> <br /> <br />the need to keep the reservoirs nearly full), there is a high <br /> <br /> <br />probability over the next several years that flood control <br /> <br /> <br />releases in excess of downstream delivery requirements will <br /> <br /> <br />have to be made from the Colorado River's reservoirs in <br /> <br /> <br />accordance with the Army Corps of Engineers Hoover Dam Flood <br /> <br /> <br />Control Regulations. This is a short-term condition which <br /> <br /> <br />will eventually be alleviated as the reservoirs are naturally <br /> <br /> <br />drawn down to meet the Basin's water needs. <br /> <br /> <br />During the decades since Hoover Dam was built, <br /> <br /> <br />commercial, residential, and recreational structures were <br /> <br /> <br />built on the riparian-lands along the river that had been <br /> <br /> <br />previously subject to flooding. Hoover Dam does provide <br /> <br /> <br />protection from the peak flows that had formerly ravaged the <br /> <br /> <br />riparian lands. However, when operating the dam to achieve <br /> <br /> <br />the optimum balance between water conservation, flood <br /> <br /> <br />control, and pOWEr generation under full reservoir <br /> <br /> <br />-3- <br />