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-3- <br /> • SECTION II - ALTERNATIVE OPERATIONAL STRATEGIES <br /> 2.1 General yr.. <br /> Alternative operational strategies characterized by the probability of <br /> achieving target storage objectives at some future date for Lakes Powell and <br /> Mead will be defined and compared to the current or base-case strategy. <br /> 2.2 Base-Case Strategies <br /> The base-case strategy or current mode of Colorado River operations is <br /> controlled by the following criteria: <br /> - Release only minimum downstream requirements from Lakes Powell and Mead <br /> unless flood control criteria dictate otherwise. <br /> - Release more than minimum downstream requirements when reservoir storage <br /> and forecasts dictate that flood control criteria releases should be <br /> made. Flood control criteria also currently require that a 5.35 maf <br /> system storage space be attained by January 1 of each year. <br /> - Release additional water as necessary from Lake Powell to equalize <br /> storage in Lakes Powell and Mead by September 30 of each year so long as <br /> sufficient water is stored in Upper Basin reservoirs to satisfy <br /> section 602(a) of P.L. 90-537. <br /> 2.3 Alternative Strategies <br /> In addition to the criteria controlling the operations in the base-case as <br /> described above, the alternative strategies would include criteria for <br /> making more than minimum downstream requirement releases to reduce the pro- <br /> bability of reservoir spills and powerplant bypasses. These surplus cri- <br /> teria would include objectives of achieving target storage values at some <br /> future date. Each alternative strategy would be characterized by objective <br /> storage targets and the probability of achieving each objective. <br />