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in 1952 to resolve its dispute with California over rights to use the Lower Basin <br />apportionment of the Colorado River Basin Compact. Much to California's dismay, <br />the Supreme Court held that by passing the Boulder Canyon Project Act, Congress <br />had, in effect, apportioned the mainstem of the Colorado River with California <br />receiving 4.4 maf, Arizona 2.8 maf, and Nevada 0.3 maf. Furthermore, the Court <br />found that the Boulder Canyon Project Act allowed Arizona and Nevada the exclusive <br />use of their tributaries, which did not support the Upper Basin states' position that the <br />Mexican Treaty obligation should -be satisfied from flows in the Lower Basin in <br />excess of their apportionment, much of which was intended to come Lower Basin <br />tributaries. <br />• Colorado River Basin Project Act (1968) <br />With the decision from Arizona v. California in its favor, Arizona sought <br />Congressional authorization of the Central Arizona. Project (CAP) in 1963. After <br />several years, the Act was approved in 1968 with many features, including <br />authorization of the CAP, five authorized projects in Colorado (Animas -La Plata, <br />Dolores, Dallas Creek, West Divide and San Miguel), the investigation of methods <br />for augmenting the flow of the Colorado River, computation of consumptive uses by <br />the Secretary of the Interior, and development of operating criteria for the coordinated <br />long -range operation of reservoirs constructed and operated under the Colorado River <br />Storage Project Act and the Boulder Canyon Project Act (Lake Mead) by the <br />Secretary of the Interior. <br />• Coordinated Long Range Operating Criteria -- Colorado River <br />Reservoir (1970) <br />The Coordinated Long -Range Operating Criteria for Colorado River <br />Reservoirs were promulgated pursuant to Section 602(a) of the 1968 Colorado River <br />Basin Project Act by the Secretary of Interior and noticed in the Federal Register on <br />June 10, 1970. These operating criteria control the coordinated long -range operation <br />of storage reservoirs and projects in the Colorado River Basin constructed under the <br />authority of Colorado River Storage Project Act (i.e. Powell, Flaming Gorge, <br />Aspinall Unit, Navajo and participating projects), the Boulder Canyon Project Act <br />(i.e. Lake Mead) and the Colorado River Basin Project Act (i.e. Central Arizona <br />Project). <br />The operating criteria require a determination by the Secretary of Interior of <br />the amount water required to be in storage in order to assure that beneficial <br />consumptive use of water in the upper basin is not impaired ( "602(a) storage <br />requirements"). If active storage is less than 602(a) storage requirements or if active <br />storage in Lake Powell is less than active storage in Lake Mead, then the objective <br />release from Lake Powell for the coming year will be 8.23 maf. However, if Lake <br />Powell storage exceeds 602(a) storage requirements and is higher than Lake Mead's, <br />4 <br />