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<br />D. <br /> <br />",..-.- -.'''.'-/ " <br /> <br />000834 <br /> <br />C. 1948 Upper Basin Compact - necessary to secure Congressional approval of the <br />1956 Colorado River Storage Project Act. Divides the consumptive use available <br />to the Upper Basin, between the states on a percentage basis <br />1. Colorado - 51.75% <br />2. New Mexico -11.25% <br />3. Utah - 23.00% <br />4. Wyoming - 14.00% <br />5. Arizona - 50,000 AF <br /> <br />1928 Boulder Canyon Project Act, 45 Stat. 1057, and Arizona v. California, 373 <br />U.S. 340 (1964) <br />1. California - 4.4 maf. California's current use is 5.2 maflyr. California has <br />been legally borrowing unused apportionment water from Nevada and <br />Arizona. <br />a. Palo Verde, the Yuma Project (Reservation Division), Imperial <br />Irrigation District and Coachella Valley Water District - I st three <br />priorities - 3.85 maf <br />b. Metropolitan Water District of Southern California - 4th and 5th <br />priorities - 1.212 maf <br />c. Imperial Irrigation District, Coachella Valley Water District and <br />Palo Verde - 6th Priority - 0.3 maf <br />d. Remaining land in Imperial Irrigation District - 7th Priority <br />e. With full development of operations of the Central Arizona Project <br />in Arizona, the Lower Basin has approached (and exceeded) its <br />basic apportionment of7.5 maflyr. of main stem water. In <br />"normal"'years, when the Lower Basin is limited to 7.5 maf, <br />California will be cut back to or toward its basic 4.4 maf. This <br />would limit Metropolitan Water District to 550,000 AF, as <br />compared its capacity in the Colorado River Aqueduct of 1/3 <br />maflyr. <br />2. Arizona - 2.8 maf - Arizona"s current use is close to 2.8 maf, due to <br />implementation of the Arizona Groundwater Bank, which diverts water <br />under the Central Arizona Project and recharges it into groundwater basins <br />in Arizona for use within or outside of Arizona. <br />3. Nevada - 0.3 maf - Nevada's current use is about 0.3 maf, and growing. <br /> <br />E. "Compact Call" - Article IV of the Upper Basin Compact <br />1. If curtailment required, the timing and quantity of curtailment by each <br />state of the consumptive use of water apportioned to that state is <br />determined by the Upper Colorado River Commission, based on the <br />following principles: <br />a. The extent and times of curtailment shall be as to assure full <br />compliance with the Compact. <br />b. If any state has in the ten years preceding the water year in which <br />the curtailment is necessary has used more water than entitled, that <br />state shall supply at Lee Ferry a quantity of water equal to its <br />overdraft, before demand is made on any other state. <br /> <br />2 <br />