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<br />Lower Basin Uses and Losses <br /> <br />After several meetings to attempt to resolve the issue of Lower Basin <br /> <br />losses and consumptive use assignments"the States of the Lower Division <br /> <br />on the committee recommended that we base the test studies on a normal <br /> <br />release of 8.4 MAF at Lake Mead for 1970 - 1979 and a normal release of <br />9.5 MAr thereafter. <br />Since 9.5 MAF normal ,release after ~ was not acceptable to all con- <br /> <br />cerned, it was suggested that the normal release after 1979 be broadened <br /> <br />to include three possibilities: 9.2, 9.5, and 9.8 MAF. The studies shown <br />in Table 4 reflect these three conditions. <br />Minimum Release from Lake Powell <br /> <br />Two different minimum releases at Lee Ferry have been used in the studies - <br /> <br />7 1/2 MAr and 8 1/4 MAF. A comparison of several parameters for comparable <br />studies using the two releases and two rates of Upper Basin depletion are <br />shown in Table 5. <br />Level of Lake Mead above Which Additional Lower Basin Use is Assumed <br />A comparison of the results of studies 16 and 17 shown in Table 6 for <br />sequences 6 and 12 indicates the magnitude of the change in the various <br />parameters that would be associated with lowering the Lake Mead level from <br /> <br />elevation 1190 to 1170 at which water deliveries for Lower Basin uses above <br /> <br />7.5 MAF would be made. <br /> <br />Level of Lake Mead below Which Shortages in Arizona Diversions are Assumed <br /> <br /> <br />Similarly, a comparison of the results of studies 16 and 18 shown in Table 7 <br /> <br /> <br />for sequences 6 and 8 indicates the magnitude of changes that would be asso- <br /> <br /> <br />ciated with lowering the Lake Mead level from elevation 1100 to 1070 at which <br />water deliveries to Arizona would be reduced below 2.8 MAF. <br /> <br />15 <br />