WSP03020

• File Number: 8278.400
• Description: Title I - Mexican Treaty and Minute 242
• Basin: Colorado Mainstem
• Date: 1/1/2000
• Author: IBWC
• Title: Minute 242 Annual Report
• Water Supply Pro - Doc Type: Annual Report

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The annual flow weighted average salinities resulting from operations under Minute No. 242, since
it became effective on June 24, 1974, are tabulated as follows:

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ANNUAL AVERAGE SALINITY (U.S. COUNT) AS TOTAL DISSOLVED SOLIDS
(PPM) DIFFERENTIAL
I YEAR AT IMPERIAL DAM UPSTREAM OF MORELOS DAM (PPM)
1974 (Jun 25 - Dee 31) 832 972 140
I 1975 829 964 135
1976 823 955 132
I 1977 820 943 123
1978 812 928 116
1979 809 739 -70
I 1980 755 740 -15
1981 806 924 118
I 1982 825 933 108
1983 733 742 9
1984 670 676 6
I 1985 607 639 32
1986 579 600 21
I 1987 610 656 46
1988 655 733 78
I 1989 682 800 118
1990 721 846 125
1991 751 858 107
I 1992 781 898 117
1993 767 613 -154
-
I 1994 797 875 78
1995 787 I
869 82
I 1996 782 859 77
1997 695 764 69
1998 655 698 43
1999 681 758 77
2000 659 778 119

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* The difference in the U.S. and Mexican counts is a result of different methods of analysis and of computing the total
dissolved solids used by laboratories in each country.

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