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<br />" <br /> <br />e <br /> <br />e <br /> <br />2) The average salinities of the waters of the Colorado River a) <br />upstream of Morelos Dam; b) arriving at Imperial Dam; and c) <br />the resulting salinity differential were as follows: <br /> <br />Total Dissolved Solids in ppm !/ <br />1991 <br /> <br />Waters <br /> <br />u.S. Count <br /> <br />Mexican Count <br /> <br />a) Colorado River upstream of Morelos Dam <br />b) Arriving at Imperial Dam <br />c) Salinity Differential <br /> <br />858 <br />751 <br />107 <br /> <br />906 <br />796 <br />110 <br /> <br />The Commission agreed by exchange of letters that the records show <br />the differential during calendar year 1991 was in accord with above <br />cited Point 1 of Minute No. 242. <br /> <br />The results of operations under Minute No. 242 since it became <br />effective on June 24, 1974, are tabulated as follows: <br /> <br />Year <br /> <br />Salinity in ppm (u.S. Count) <br />Imperial Dam Above Morelos Dam Differential <br /> <br />1974 (Jun 25 - Dec 31) 832 972 140 <br />1975 829 964 135 <br />1976 823 955 132 <br />1977 820 943 123 <br />1978 812 928 116 <br />1979 809 739 -70 <br />1980 755 740 -15 <br />1981 806 924 118 <br />1982 825 933 108 <br />1983 733 742 9 <br />1984 670 676 6 <br />1985 607 639 32 <br />1986 579 600 21 <br />1987 610 656 46 <br />1988 655 733 78 <br />1989 682 800 118 <br />1990 721 846 125 <br />1991 751 858 107 <br /> <br />The results of operations under Minute No. 242 are shown graphical- <br />ly on Exhibit 2, which also shows the salinity of the waters arriv- <br />ing at Imperial Dam and of the waters made available to Mexico at <br />the Northerly International Boundary since 1951, the first full <br />year of deliveries to Mexico under the water Treaty of 1944. <br /> <br />The difference in u.s. count and Mexican count is due to <br />the use of different methods of analyses and of computing the <br />total dissolved solids, by each country's laboratory. <br /> <br />!/ <br />