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<br />HISTORY OF WATER RESiJJRCE DEVELOPMENT <br /> <br />f~ <br />C>> <br />00 One provlslon in the compact permits exportation of the water out of <br />~ the basin as long as it is used beneficially in the seven Basin States, <br />and another provision recognizes the obligations of the United states to <br />the Ind.ian Tribes. The compact prescribes the manner in which the waters <br />of the Colorado River system may be made available to Mexico Ullder any <br />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 it <br />also cleared the way for compacts or agreements within the Upper and Lower <br />Basins to further divide the water among the states. <br /> <br />2. Mexic8-'l Treaty <br /> <br />The treaty with Mexico, signed in 1944, provides basically for a <br />guarateeed annual delivery by the United States to ~exico of 1,500,000 <br />acre-feet of Colorado River water. <br /> <br />3. ~er Colorado River Basin Compact <br /> <br />With the water allocated to the Upper Basin by the Colorado River Com- <br />pact and with the Mexican Treaty signed, the Upper Basin states began ne- <br />gotiations which resulted in the signing of the Upper Colorado River Basin <br />Compact in 1948. Unler the terms of the compact, Arizona is permitted to <br />use 50,000 acre-feet of water annually from the Upper Colorado River sys- <br />tem, and the remaining water is apportioned to the other Upper Basin <br />States in the following percentages. <br /> <br />State of Colorado . <br />state of New Mexico <br />state of Uta.l1 . . <br />State of Wyo:ning <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 without <br />assurance that a water supply would be available, so this division of <br />water among the States permitted development in the Upper Basin to pro- <br />ceed and resulted primarily in the authorization of most of the Federal <br />projects above Lee Ferry that are mentioned in this report. <br /> <br />Neither of the compacts specifirally mentions water quality, but it <br />has been recognized as a factor to be considered in developing projects, <br />and water quality studies have been required by recent legislation au- <br />thorizing the construction of projects in the Upper Basin. <br /> <br />4. Arizona vs. California Suit in the Su;Ereme Court <br /> <br />The States of the Lower Basin have never agreed to a compact for the <br />division of use of the waters of the Lower Colorado River Basin. The <br /> <br />14 <br /> <br />