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<br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />..... <br />1\J <br />0-' <br /> <br />.., <br />, , <br /> <br />HISTORY OF WATER RESOURCE DEVELOPXE~T <br /> <br />the Lower Basin is given the right to increase its beneficial consumptive <br />use of water from the Colorado River system by 1 million acre-feet <br />annually. The compact further provides that the States of the upper <br />division will not cause the flow of the river at Lee Ferry to be depleted <br />below an aggregate of 75 million acre-feet for any period of 10 consecutive <br />years. <br /> <br />One provision in the COmpact permits exportation of the water out <br />of the basin as long as it is used beneficially in the seven Basin <br />States, and another provision recognizes the obligations of the United <br />States to the Indian Tribes. The compact prescribes the manner in which <br />the water of the Colorado River system may be made available to ~exico <br />under any water rights recognized by the United States. <br /> <br />The compact, in effect, cleared the way for legislation authorizing <br />the construction of major projects such as Boulder Canyon Project, and <br />it also cleared the way for compacts or agreements within the Upper and <br />Lower Basins to further divide the water among the States. <br /> <br />2. ~exican Treatv of 1944 <br /> <br />The treaty with Mexico, signed in 1944, provides for the annual <br />guaranteed delivery by the United States of 1,500,000 acre-feet of <br />Colorado River water to Mexico. This treaty does not mention water <br />quality, and water from different sources had been used to supply the <br />1,500,000 acre-feet right. Because of this and other reasons, a problem <br />of quality arose which had become of much concern to both countries. The <br />quality aspects of the relationship with Mexico is covered later under <br />"Legal Aspects, Water Quality." <br /> <br />12 <br />