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order to minimize the salinity of Mexico's irrigation water. The o tjpnited States also agreed to control the flows in the river reach- ...:!: t.Qling the Hexican diversion point during the ,winter months so that, !exclUding the l1ellton-Mohawk drainage, the flows in the river ~OUld meet Mexico's minimum treaty requirements durins those ~onths, and so that during at least 90 days Mexico might bypass all i :the v7ellton-Hohawk drainage, thereby giving the! United States oppor- , tunity to pump the worst wells at a maximum rate. I tVhile operations under the agreement fuctioned as the United i , :States anticipated, Mexican authorities were not satisfied. Each iyear, in order to obtain a maximum daily salinity ceiling of 1300 I , !ppm, the Hexican Government had to sacrifice about three percent I 'of its treaty water by bypassing it. Mexican authorities indicated 'that they could not agree to an extension of the agreeme~t that would entail this continued loss of treaty water. Further study by the De!partment of the Interior and the U.S. Sec- tion of the International Boundary and Water commission resulted in a plan that would reduce the salinity of the water delivered to Nexico so that Hexico could avoid the loss of treaty water, but that would not require the release of additional stored water. Negotiations relative to this plan resulted in a new agreement, called Minute No. 241 of the International Boundary and Water Commission, which was signed on July 14, 1972. Under the Ninute the United States was required to discharge drainage waters from the Well ton-Mohawk Irrigation and Drainage District of Arizona to the Colorado River below Morelos Dam, }lexico's diversion point, at the annual rate of 118,000 acre-feet. , 11 ~-, t -