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<br />. <br /> <br />. <br /> <br />. <br /> <br />the Lee Ferry compact point and the Mexican border. In <br /> <br /> <br />testimony submitted before the Master in the Arizona-California <br /> <br /> <br />case, one witness for Arizona (John R. Erickson) contended that <br /> <br /> <br />in years of high runoff the entire burden of the Mexican Treaty <br /> <br /> <br />(plus an estimate of 300,000 acre-feet for conveyance losses <br /> <br /> <br />between Lee Ferry and the Mexican boundary) should be released <br /> <br /> <br />at Lee Ferry as the Upper Division III(c) obligation. <br /> <br />After the Colorado River is augmented to meet the Mexican <br />Treaty demand as anticipated by Section 202 of P.L. 90-537, <br />this problem will become academic. <br /> <br />In the operation studies which formed the basis of our <br /> <br /> <br />testimony before the Congressional Committees in connection <br /> <br /> <br />with the Colorado River Basin Project, we made the assumption <br /> <br /> <br />that as the Upper Basin approached full development, the <br /> <br /> <br />minimum delivery at Lee Ferry in any period of 10 consecutive <br /> <br /> <br />years would be 82,500,000 acre-feet. To avoid an erratic <br /> <br /> <br />annual pattern of release, we used for a series of low runoff <br /> <br /> <br />years an annual delivery at Lee Ferry of 8.25 million acre- <br /> <br /> <br />feet. By subtracting off the annual flow of the Paria River <br /> <br /> <br />of about 20,000 acre-feet, we derived a minimum annual <br /> <br /> <br />release from Lake Powell of 8.23 million acre-feet. <br /> <br />13 <br />