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<br />c.; seven states, were frequently consulted Guring both the investigations and sub- <br />~ <br />CO sequent negotiations with Mexico. The states identified several concerns with <br />. , <br />00 respect to the proposed agreement, and requested that these concerns be worked <br /> <br />out before final signing occurred. However, Minute 242 was executed before agree- <br /> <br />ment could be reached with the states on all outstanding issues. The key elements <br /> <br />of the agreement are: <br /> <br />(1) The United States shall adopt measures to assure that by July 1, 1974, <br /> <br />the water delivered to Mexico upstream of Morelos Dam shall have an average annual <br /> <br />salinity of no more than 115 ppm over the average annual salinity at Imperial Dam. <br /> <br />This requirement is to become effective upon the authorization of the United States <br /> <br />Congress of funds to construct works necessary to achieve the limited differ- <br /> <br />ential in salinity. (Although not fully spelled out in the Minute, the works or <br /> <br />measures proposed are: desalting plants on the Wellton-Mohawk I~rigation District <br /> <br />drain located near Yuma, Arizona, below the last American use; extension of drain <br /> <br />to Gulf of California; reduction in Wellton-Mohawk acreage; improved Wellton- <br /> <br />Mohawk irrigation efficiency; and lining of the Coachella Canal in California to <br /> <br />give the United States a temporary benefit from salvage of water). <br /> <br />(2) Until the above ~equirement becomes effective, the United States agrees <br /> <br />to deliver to Mexico 118,000 acre-feet annually to replace an equivalent (~antity <br /> <br />of Wellton-Mohawk drainage water that will be bypassed around Morelos Dam in <br /> <br />Mexico. (This provision has been in effect as a temporary measure since July 1972)0 <br /> <br />(3) Pending conclusion of a comprehensive groundwater agreement, United <br /> <br />States and Mexico jointly agree to limit pumping of ground waters within five miles <br /> <br />of the Arizona-Sonora boundary to 160,000 acre-feet per year. (Mexico has its <br /> <br />pumps installed and operating. Mexico's pumping will reduce the drainage contri- <br /> <br />bution to overland supplies delivered by the United States to Mexico at the <br /> <br />7 <br />