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<br />. <br /> <br />. <br /> <br />. <br /> <br />- 2 - <br /> <br />Total Dissolved Solids in ppm 1/ <br /> <br />Waters <br /> <br />1976 <br />u.s. <br />Count <br /> <br />Nexlcan <br />Coun t <br /> <br />a) Delivered to Mexico upstream <br /> of Norelos Dam 955 1004 <br />b) Arriving at Imperial Dam 823 866 <br />c) Salinity Differential 132 138 <br /> <br />The Commission has agreed by exchange of letters that the records shm, <br />that the differential during calendar year 1976, was in accord with <br />Point 1 of Hinute No. 242. <br /> <br />The results of operations under Minute No. 242 are shown graphically <br />on Exhibit 2, which also shows the salinity (If the waters arrj.ving at <br />Imperial Dam and of the waters made available to Nexico at the <br />Northerly International Boundary since 1951, the first full year <br />of deliveries to Nexico under the Hater Treaty of 1944. <br /> <br />The interim measure adopted by the United States to effect the <br />reported salinity differential pending completion and operation <br />of a desalting project, consists of discharging of all Wellton-Nohawk <br />drainage waters to the Colorado River dm:vnstream from NoreIos Dam <br />by means of the existing bypass channel, and substituting for such <br />waters an equal volume of other waters, consisting principally of <br />waters from above Imperial Dam and of \"ater pumped on the Yuma Hesa. <br /> <br />During calendar year 1976 the following quantity of Wellton-Mohawk <br />drainage waters was discharged to the Colorado River below Marelos Darn <br />and substituted for by other waters in making del.iveries to Mexico: <br /> <br />Calendar Year <br /> <br />Acre-feet <br /> <br />Cubic Neters <br /> <br />1976 <br /> <br />205,395 <br /> <br />253,353,000 <br /> <br />1./ The differences in U. S. count and ~~exican count are due to <br />use of different methods of analyses and of computing the total dissolved <br />solids, by each country's laboratory, <br />