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<br />C':"J <br /><-:::l <br />~... <br />to? <br />-.J <br />~ <br /> <br />-]- <br /> <br />stored I,ater from above Imperial Dam to replace drainage I,aters bypassed <br /> <br />by the U.S. and to meet the Mexico entitlement of 1.5 million acre-feet. <br /> <br />By.the end of 1971, the united States operations under Minute <br /> <br />No. 218, together I,ith gradual improvement of Well ton-Mohawk drainage, <br /> <br />had reduced the average annual salinity of waters made available to <br /> <br />Mexico to 1240 parts per million. <br /> <br />Befo:ce Minute No. 218 was to have expired in November 1970, the <br /> <br />United States in 1970 offered Mexico a new Minute for at least five years. <br /> <br />But the administration of President Diaz Ordaz decided to leave .the matter <br /> <br />to the new administration of President Echeverria, which took office in <br /> <br />December 1970. Minute No. 218 "TaS therefore extended for one year. In <br /> <br />1971 and early 1972, the Governments exchanged several proposals in an <br /> <br />attempt to reach an agreement, extending l1inute 218 in November 1971 for <br /> <br />another year so that the discussions might be continued. The tl'O countries <br /> <br />failed to reach an agreement after further discussions in the first part <br /> <br />of 1972. <br /> <br />Mexican officials indicated that, to Mexico, the principal issue <br /> <br />was the difference in quality between the water available to United States <br /> <br />users below Imperial Dam (about 8S0 parts per million for most part) <br /> <br />and the water delivered to Mexico at the Northern International Boundary, <br /> <br />in compliance with the Water Treaty (then averaging about 1240 parts per <br /> <br />million). The main source of this difference in quality was the drainage <br /> <br />from the Well ton-Mohawk District. <br /> <br />~..j,."", <br />