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. w:::. o (D OJ . . Year 1974 (June 25 to December 31) 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 5 Acre-Feet 57,055 107,916 108,090 93,259 80,592 87,770 102,196 115,994 107,697 97,784 111,884 111,952 124,829 118,025 Thousands of Cubic Meters 70,377 133,113 133,328 115,034 99,409 108,263 126,058 143,077 132,843 120,616 138,007 138,091 153,974 145,581 The deliveries to Mexico on the land boundary and in the limitrophe section below Morelos Dam in calendar year 1987 which were less than the annual volume of 140,000 acre-feet (172,689,000 cubic meters) referred to in Minute 242 were made up by waters delivered to Mexico in the bed of the river above Morelos 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 (172,689,000 cubic meters) referred to in Minute 242, because of the effects of pumping in prior years of groundwaters by the Yuma Mesa wells, the protective and regulatory pumping wells in the U.S., drainage wells in the Yuma Valley and by Mexican wells near San Luis. Average salinities of the waters delivered to Mexico on the land boundary at San Luis under Minute No. 242, since it became effective on June 24, 1974, are tabulated as follows: Year 1974 (June 25 to December 31) 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 Total Dissolved Solids in ppm (U.S. Count) 1515 1500 1480 1510 1470 1538 1582 1572 1470 1434 1487 1513 1496 1431 The above data show that the salinity in 1987 was in .the same range as that of the waters customarily delivered on the land boundary, which averaged about 1540 ppm for the 10-year period 1963-1972.