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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Dam, b) arriving at Imperial Dam, and the resulting salinity differential were as follows: <br /> <br />Waters <br /> <br />U.s. Count. <br />!wmll <br /> <br />Mexican Count. <br />!wnW <br /> <br />a) <br />b) <br /> <br />Upstream of Morelos Dam <br />Arriving at Imperial Dam <br />Salinity Differential <br /> <br />869 <br />787 <br />82 <br /> <br />948 <br />847 <br />101 <br /> <br />The annual average salinities resulting from operations under Minute No. 242, since it became <br />effective on June 24, 1974, are tabulated as follows: <br /> <br /> ANNUAL AVERAGE SALINITY (U.S. coUNT) AS TOTAL DISSOLVED SOLIDS <br /> (pPM) DIFFERENTIAL <br />YEAR AT IMPERIAL DAM UPSTREAM OF MORELOS DAM (PPM) <br />1974 (Jun 2S - Dec31) 832 972 140 <br />1975 829 964 13S <br />1976 823 9SS 132 <br /> . <br />1977 820 943 123 <br />1978 812 928 116 <br />1979 809 739 -70 <br />1980 7SS 740 -IS <br />1981 806 924 118 <br />1982 82S 933 108 <br />1983 733 742 9 <br />1984 670 676 6 <br />1985 607 639 32 <br />1986 S79 600 21 <br />1987 610 6S6 46 <br />1988 6SS 733 78 <br />1989 682 800 118 <br />1990 721 846 12S <br />1991 7S1 8S8 107 <br />1992 781 898 117 <br />1993 767 613 -IS4 <br />1994 797 87S 78 <br />1995 787 869 82 <br /> <br />* The difference in the U.S. and Mexican counts is a result of different methods of analysis and of computing the total <br />dissolved solids used by laboratories in each country. <br /> <br />2 <br />