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<br /> <br />. <br /> <br />HISTORY OF WATER RESOURCE DEVELOPME~T <br /> <br />3. <br /> <br />Upper Colorado River Basin Compact <br /> <br />~- With the water allocated to the Upper Basin by the Colorado River <br />~ Compact and with the 1944 Mexican Treaty signed, the Upper Basin States <br />~ began negotiations which resulted in the signing of the Vpper Colorado <br />OJ River Basin Compact in 1948. Under the terms of the compact, Arizona <br />is permitted to use 50,000 acre-feet of water annually from the Upper <br />Colorado River system, and the remaining water Is apportioned to the <br />other Upper Basin States in the following percentages. <br /> <br />State of Colorado <br />State of ~ew ~exico <br />State of Utah . . <br />State of ~yoming <br /> <br />51.75 percent <br />11.25 percent <br />23.00 percent <br />14.00 percent <br /> <br />Congress had previously been unwilling to approve projects ~ithout <br />assurance that a water supply would be available, so this division of <br />water among the States permitted development to proceed and resulted <br />primarily in the authorization of most of the Federal projects above <br />Lee Ferry that are mentioned in this report. <br />, <br /> <br />. <br /> <br />~either of the compacts specifically mentions water quality, but <br />it has been recognized as a factor to be considered in developing projects, <br />and water quality studies have been required by recent legislation author- <br />izing the construction of projects in the Upper Basin. <br /> <br />4. Arizona vs. California Suit in the Supreme Court <br /> <br />The States of the Lower Basin have never agreed to a compact for <br />the division of use of the waters of the Lower Colorado River Basin. <br />The State of Arizona filed suit in the Supreme Court of the United States <br />in October 1952 against the State of California and others for the deter- <br />mination of the rights to use the waters of the Lower Colorado River <br />system. The Supreme Court gave its decision on June 3, 1963, and issued <br />a decree on March 9, 1964, providing for the apportionment of the use <br />of the waters of the main stream of the Colorado River below Lee Ferry <br />among the States of Arizona, California, and ~evada. The States of <br />Arizona and New Mexico were granted the exclusive use of the ~aters of <br />the Gila River system in the United States. The decree did not affect <br />the rights or priorities to the use of Water in any of the other Lower <br />Basin tributaries of the Colorado River. <br /> <br /> <br />The decree permitted the States of the Lower Basin to proceed with <br />developments to use their apportionments of Colorado River water. ~ajor <br />new developments include the Southern Nevada Water Project in Nevada, <br />and the Central Arizona Project in Arizona. Development of the Indian <br />lands is expected to use all of the water allocated to them by the <br />~ decree. These lands include the Colorado River Indian Reservation, <br /> <br />13 <br />