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<br />. <br /> <br />. <br /> <br />Nevada to meet Nevada's M&I needs above its basic apportionment of 0.3 maf after about the <br />year 2005. <br />B. Tiered Surplus Strategy <br />The Six State proposal for Lake Mead operation. like the California 4.4 Plan proposal. <br />envisions a tiered water management approach. In order to meet the objective of providing <br />additional water to MWD and the Southern Nevada Water Authority ("SNWA"), Arizona must <br />agree, under certain circumstances. to temporarily waive all or a portion of its legal entitlement to <br />46% of any surplus. The Six State tiered approach allows Lower Basin demands to be met <br />incrementally based on designed surplus releases under certain reservoir conditions and <br />anticipated runoff. The tiered approach steps are summarized as follows: <br />1.) Normal Year <br />During the period while the proposed interim criteria are in place. normal years will be <br />declared only when available Lake Mead storage is at or below elevation 1125 (13.569 maf <br />content). This represents about 3.8 maf of available storage capacity above the minimum power <br />pool. 'This amount of storage will allow a minimum of five years of normal year deliveries <br />through a drought cycle represented by the 33'" percentile lowest five year average of historic <br />runoff. At the end of the five-year period. the reservoir elevation would be at 1083. which is the <br />minimum power head (9.764 maf content). While this elevation is greater than the protection <br />level proposed for declaration of shortages. the Six States feel that surplus declarations must be <br />terminated 5 years before power production is impacted. rather than 5 years before the SNW A <br />water intake structure is impacted. <br />In a normal year, California will be limited to 4.4 maf of consumptive use. and Nevada <br />will be limited to 0.3 maf of consumptive use. unless unused apportionment is available from <br />Arizona. <br /> <br />2.) Partial M&I Surplus <br />During the interim period. MWD and SNW A will be allowed to increase orders which <br />would result in California's and Nevada's consumptive uses exceeding their basic apportionments. <br />Under the partial surplus tier, the surplus volume would not be large enough to keep the Colorado <br />River Aqueduct full nor to meet all of the potential needs of the SNW A. The volume of surplus <br /> <br />7 <br />