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<br />-.\1 <br />OilJ.... <br /> <br />DRAFT <br /> <br />annum. There is a provision made for the insurance of a certain <br /> <br />quantity of water passing from the Upper Basin to the Lower Basin <br /> <br />at Lee Ferry. This was accomplished by an agreement on the part <br /> <br />of the Upper Basin states not to cause the flow of the Colorado <br /> <br />River to be depleted below an aggregate of 75,000,000 acre-feet <br /> <br />for any ten-year period. <br /> <br />The Compact provides that if the United States recognized any <br /> <br />rights by Mexico in the Colorado River, the water would be supplied <br /> <br />from the waters which are surplus to the allocations made to the <br /> <br />Upper and Lower Basins. If this is not sufficient, then the burden <br /> <br />of fulfilling the shortages will be equally borne by the Upper and <br /> <br />Lower Basin states. <br /> <br />The Rio Grande, Colorado and Tijuana Treaty of 1954 between <br /> <br />the United States and Mexico guaranteed delivery of 1,500,000 <br /> <br />acre-feet of water per year to Mexico from the Colorado River. <br /> <br />Recent legislation, specifically Public Law 90-537 (Colorado <br /> <br />River Basin Project Act) approved September 30, 1968, declared <br /> <br />that the satisfaction of the requirements from the Colorado River <br /> <br />to Mexico constitutes a national obligation of any water augmen- <br /> <br />tation project planned pursuant to the Act and authorized by the <br /> <br />Congress. It relieves both the Upper and Lower Basin from the <br /> <br />compact requirement covering deliveries of water to Mexico. This <br /> <br />relief is contingent upon the authorization and operation of a <br /> <br />plan to augment the Colorado River water supplies by 2~ million <br /> <br />acre-feet annually. <br /> <br />Upper Colorado River Basin Compact <br /> <br />This compact between the states of Arizona, Colorado, <br /> <br />-5- <br />