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<br />B. LEGAL HISTORY <br /> <br />The Colorado River Compact divided the drainage system of this river <br /> <br />into an Upper Basin and a Lower Basin; apportioned in perpetuity to each <br /> <br />" <br /> <br />Basin the exclusive beneficial consumptive use of 7.5 million acre- <br /> <br />. <br />. .~. <br />.' <br /> <br />feet of water each year; gave the lower basin the right to increase <br /> <br />its beneficial consumptive by 1.0 million acre-feet each year; provided <br /> <br />that the upper division would not withhold and the lower division should <br /> <br />not require delivery water which could not reasonably be applied to <br /> <br />domestic and agricultural uses; created two classes of states, Upper <br /> <br />Division and Lower Division while providing that the Upper Division not <br /> <br />cause the flow of the river at Lee Ferry, Arizona to be depleted below a <br /> <br />aggregate of 75 million 3cre~feet for any period of 10 consecutive years; <br /> <br />the burden of delivery of water to Mexico <br /> <br />1 <br />that might result from a water · <br /> <br />), <br />\1' <br />. <br /> <br />and provided for the sharing by the Upper and Lower Division states of <br /> <br />treaty. The Boulder Canyon Project Act, Boulder Canyon Project Adjust- <br /> <br />ment Act, Mexican Water Treaty, Upper Colorado River Basin Compact and <br /> <br />various state laws, contracts and agreements further defined the rights <br /> <br />and entitlements of each of the seven Colorado River Basin States to the <br /> <br />yield of the river system. The Colorado River Storage Project Act of <br /> <br />.1956 and the filling criteria for Upper Basin Reservoirs. provided for <br /> <br />the constructtion and initial filling of the reservoirs of the Colorado <br /> <br />River Storage Project in accordance with the "Law of the River". <br /> <br />-. <br /> <br />The Colorado River Basin Project Act, P.L. 90-537, and the Coordinated <br /> <br />". <br /> <br />Long-Range Operating Criteria defined in further detail the criteria that <br /> <br />would govern the storage and releases of the water of the Colorado River <br />