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2 . Period Acre-feet Cubic Meters a) June 25, 1974 through December 31, 1974 660,867 815,173,000 b) January 1, 1975 through December 31, 1975 1,404,927 1,732,964,000 2) The average salinities of the waters a) delivered to Mexico upstream of Morelos Dam and b) arriving at Imperial Dam and c) the resulting salinity differentials were as follows: Total Dissolved Solids in ppm y June 25, through Jan 1 through Dec 31. 1974 Dec 31, 1975 U.S. Mexican U.S. Mexican Waters Count Count Count Count ~ a) Delivered to Mexico 972 1023 964 1016 b) Arriving at Imperial Dam 832 885 829 880 c) Salinity Differential 140 138 ,l~ 136 ~ . On the basis of the records, the Commission has agreed by exchange of letters that the differential during the first 12 months of operations, June 25, 1974 through June 24, 1975, and during the calendar year 1975 were in accord with Point 1 of Minute No. 242. The results of operations under Minute No. 242 are shown graphically on Exhibit 2, which also shows the salinity of the waters arriving at Imperial Dam and of the waters made available to Mexico at the Northerly International Boundary since 1951, the first full year of-~l~vertes to Mexlco under tne Water Treaty of f944. The interim measure adopted by the United States to effect the reported salinity differentials pending completion and operation of a desalting project, consists of dicharging of all Wellton-, Mohawk drainage waters to the Colorado River downstream from Morelos Dam by means of the existing bypass channel, and substi- tution for such waters of an equal volume of other waters, con- sisting principally of waters from above Imperial Dam and of waters pumped on the Yuma Mesa. 1/ The United States and Mexico use different methods of analyses and of computing the total dissolved solids, which result in the different counts shown in the table. .