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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br /> u.s. Count. Mexican Count. <br /> Waters Umm1 Umm1 <br />a) Upstream of Morel os Dam 698 740 <br />b) Arriving at Imperial Dam 655 708 <br /> Salinity Differential 43 32 <br /> <br />The annual flow weighted average salinities resulting from operations under Minute No. 242, since <br />it became effective on June 24, 1974, are tabulated as follows: <br /> <br />I ~~"_" ~_~ <br />I <br /> <br /> ANNUAL AVERAGE SALINITY (U.S. coUNT) AS TOTAL DISSOL YED SOUDS <br /> (PPM) DIFFERENTIAL <br />YEAR AT IMPERIAL DAM UPSTREAM OF MORELOS DAM (PPM) <br />1974 (Jun 25 - Dee 31) 832 972 140 <br />1975 829 964 135 <br />1976 823 955 132 <br />_ __ ~ _1977, _ ___ ~ - - --- ~ _ ~_._._820_ ~ ~ _ _ _ ~'_ ~ ~ ~ _ ____~~_~9~43____~~ 1)3 <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 />198"i - - - .- - - - -- 610 - . 656 '46 <br />1988 655 733 78 <br />1989 682 800 118 <br />1990 721 846 125 <br />1991 751 858 107 <br />1992 781 898 117 <br />1993 767 613 -154 <br />1994 797 875 78 <br />1995 787 869 82 <br />1996 782 859 77 <br />1997 695 764 69 <br />1998 665 698 43 <br /> <br />I <br />I <br />I <br /> <br />I <br />I <br /> <br />I <br />I <br />I <br />I <br />I <br /> <br />* The difference in the U.S. and Mexican counts is a result of different methods of analysis and of computing the <br />total dissolved solids used by laboratories in each country. <br /> <br />2 <br />