Laserfiche WebLink
<br />Plan of Operation- <br />Water Year 1976 <br /> <br />3, <br /> <br />For average runoff conditions dur- <br />ing water year 1976, the projected <br />operation of each of the reservoirs <br />in the Colorado River Basin is <br />described in the following para- <br />graphs. Charts 1 through 9 show <br />hydrographs of the projected <br />monthly outflow from the reser- <br />voirs and the projected end-of. <br />month elevation and active stor- <br />age in the reservoirs for average <br />and three other assumptions of <br />1976 modified runoff from the <br />Basin. The four assumptions are: <br /> <br />(1) AVERAGE based on the 1906- <br />68 record of runoff, (2) UPPER <br />QUARTILE based on flows ex- <br />ceeded 25 percent of the time <br />during 1906.68, (3) LOWER <br />QUARTILE based on flows ex- <br />ceeded 75 percent of the time <br />during 1906,68, and (4) MOST <br />ADVERSE based on the lowest <br />year of record, which occurred <br />in 1934. <br /> <br />The projected releases from Lake <br />Powell are 8.23 million acre-feet <br />for the most adverse assumed run- <br />off conditions. The lower quartile, <br />average, and upper quartile as- <br />sumed runoff conditions would <br />cause a splitting of storage condi. <br />tion between Lake Mead and Lake <br />Powell, and releases from Lake <br />Powell would be 8.5, 9.7 and 10,7 <br />million acre-feet, respectively. The <br />lower quartile, average, and upper <br />quartile Lake Powell release would <br /> <br />cause Lake Mead to rise 2 feet, <br />10 feet, find 16 feet higher at the <br />end of the current year than the <br />level reached by the most adverse <br />condition. The projected opera. <br />tions of Lake Mohave and Lake <br />Havasu are the same under all <br />four of the runoff assumptions. <br /> <br /> <br />