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<br />PART 1. INTRODUCTION <br /> <br />A. Background <br /> <br />Colorado River water is delivered to Mexico at the following <br /> <br />locations: <br /> <br />1. In the Colorado River at the northerly international <br /> <br />boundary about one mile above Morelos Dam. <br /> <br />2. Wasteways in the 11:m1trophe section of the river <br /> <br />below Morelos Dam. <br /> <br />3. Across the international land boundary near San Luis, <br /> <br />Mexico. <br /> <br />Monthly amounts of water are delivered to Mexico in accordance with <br /> <br />a schedule submitted by Mexico, by January 1 of each year, as provided <br /> <br />in the Treaty of 1944 between the United States and Mex1co. The <br /> <br />treaty fUrther provides that Mexico must accept a minimum delivery <br /> <br />of 900 cfs during the winter months of October, November, December, <br /> <br />January, and February. During the past year, the highest salinity <br /> <br />concentrations nave occurred in these months. <br /> <br />Prior to the winter of 1961, before the Well ton-Mohawk drainage <br /> <br />conveyance channel was placed in operation, Mexico, without protest, <br /> <br />I' <br /> <br />accepted the water as scheduled and delivered. During the winter <br /> <br />of 1961-1962, after the drainage conveyance channel was placed in <br /> <br />'J <br /> <br />complete operation in August 1961, the water delivered at Morelos <br /> <br />Dam sho;red a marked increase in dissolved solids content. <br /> <br />As a result of Mexican protests over the increased salinity, <br /> <br />the Presidents of the United States and Mexico, on March 16, 1962, <br /> <br />agreed to seek a solution of the salinity problem in connection with <br /> <br />958000 - 63 - 2 <br /> <br />1 <br />