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'. . . -3- Deliveries on the Land Boundary Point 1 of Minute No. 242 further provides that: "The United States will continue to deliver to Mexico on the land boundary at San Luis and in the 1imitrophe sec- tion of t~e Colorado River downstream from Morelos Dam approximately 140,000 acre-feet (172,689,000 cubic meters) annually with a salinity substantially the same as that of waters customarily delivered there." The quantities of waters delivered to Mexico on the land boundary at San Luis and in the limitrophe section of the river below Morelos Dam, excluding the Well ton-Mohawk drainage waters, were: Calendar Year Acre-Feet Cubic Meters 1976 108,090 133,328,000 The decrease in deliveries on the land boundary and in the 1imitrophe section below Morelos Dam in calendar year 1976 from the annual volume of 140,000 acre-feet (172,689,000 cubic meters) referred to in the Minute, was made up by waters delivered to Mexico in the bed of the river above More10s Dam as is required by Point 1 of the Minute. The quantities of water delivered across the land boundary at San Luis and in the limitrophe section below Morelos Dam were less than the annual volume of 140,000 acre-feet (172,789,000 cubic meters) referred to in Minute No. 242, because of the effects of pumping from the groundwaters by the Yuma Mesa wells and by Mexican wells near San Luis. Average Salinities of the waters delivered to Mexico on the land boundary at San Luis were: Calendar Year Total Dissolved Solids (U.S. count) 1976 1480 ppm The salinities were in the same delivered on the land boundary, ten-year period 1963-1972. range as those of the waters customarily which averaged about 1540 ppm for the Pro~ress on United States Measures Provided for in P.L. 93-320 The progress made on the permanent measures to be taken and the works to be constructed, operated, and maintained in the United States by the Secretary of the Interior, pursuant to Public Law 93-320, Title 1, to,enable the United States to comply with the provisions of ~linute No. 242, is described in the Bureau of Reclamation's Status Report as of December 28, 1976, copy attached as Exhibit 3. This report shows that the desalting plant is scheduled to be in operation by December 1981.