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<br />The annual flow weighted average salinities ofthe waters arriving at Imperial Dam since 1951, the
<br />first full year of deliveries to Mexico under the 1944 Water Treaty, and ofthe waters made available
<br />to Mexico at the Northerly International Boundary since 1958 are graphically shown on Exhibit 2,
<br />which shows the effect of operations under Minute No. 242.
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<br />Interim measures adopted by the United States to effect the agreed upon salinity differential,
<br />pending a permanent means to resolve the issue, consists of discharging all Wellton-Mohawk
<br />drainage waters into a bypass channel to convey them to the Santa Clara Slough near the Gulf of
<br />California. The quantities of Well ton-Mohawk drainage waters discharged and substituted for by
<br />other waters for the deliveries to Mexico under Minute No. 242, since it became effective on June
<br />24, 1974, are tabulated as follows:
<br />
<br /> ANNUAL VOLUME DISCHARGED
<br />YEAR (THOUSAND CUBIC METERS) (ACRE-FEET)
<br />1974 (J un 25 - Dee 3 I ) 140,180 I 13,645
<br />1975 264,866 214,729
<br />1976 253,353 205,395
<br />1977 255,113 206,822
<br />1978 224,540 182,036
<br />1979 219,472 177 ,928
<br />1980 190,735 154,630
<br />1981 183,082 148,426
<br />1982 184,651 149,698
<br />1983 220,988 · 179,157 ·
<br />1984 154,944 .. 125,615..
<br />1985 159,987 129,704
<br />1986 135,747 110,052
<br />1987 120,562 97,741
<br />1988 158,103 128,176
<br />1989 170,990 138,624
<br />1990 164,900 133,690
<br />1991 173,583 140,726
<br />1992 124,716 101,109
<br />1993 75,784 ... 61,439."
<br />1994 156,477 124,435
<br />1995 154,772 125,475
<br />1996 138,632 112,390
<br />1997 109,971 89,155
<br />1998 140,332 113,769
<br />1999 97,044 78,675
<br />'71'l1'l1'l Il'7 ~ll'l I1'l7.u.l
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<br />· This includes an undetermined amount of flood waters due to breaks in a bypass canal levee in the United States.
<br />.. Includes Gila River water.
<br />... The low flows are due to damage on the drainage canal caused by Gila River flood waters. Drainage waters entered the
<br />Gila River from 02/21/93 to 01/18/94 and were diluted by the high flows.
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