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2 . The Commission has agreed by exchange at. letters that the records show that the differential during calendar year 1977 was 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 deliveries to Mexico under the Water Treaty of 1944. The interim measure adopted by the United States to effect the reported salin- ity differential pending completion and operation of a desalting project, con~ sists of discharging of all Well ton-Mohawk drainage waters to the Colorado River downstream from Morelos Dam until June 23, 1977, and thereafter convey- ing these waters-by means of the then completed bypass channel to the Gulf of California, and substituting "tor such waters an equal volume of other waters, consisting principally of waters from above Imperial Dam and of water pumped on the Yuma Mesa. During calendar year 1977 the quantity of Well ton-Mohawk drainage waters dis- charged to the Colorado River below Morelos Dam and the Gulf of California and substituted for by other waters in making deliveries to Mexico, was as follows: Calendar Year Acre-Feet Cubic Meters . 1977 206,822 255,113,000 Deliveries on the Land Boundary Point 1 of Ninute No. 242 further provides that: "The United States will continue to deliver to Mexico on the land boundary at San Luis and in the limitrophe section of the Colorado River downstream from Morelos Dam approximately 140,000 acre-feet (172,689,000. cubic meters) annually with a salinity substantially the same as that of waters customarily delivered there." The quantities of waters delivered to Nexico on the land boundary at San Luis and in the limitrophe section of the river below Morelos Dam, excluding the Well ton-Mohawk drainage ~aters, were: Calendar Year Acre-Feet Cubic Heters 1977 93,259 115,034,000 The decrease in deliveries on the land boundary and in the limitrophe section below Norelos Dam in calendar year 1977 from the annual volume of 140,000 acre-feet (172,689,000 cubic meters) referred to in the ~linute, was made up by waters delivered to Mexico in the bed of the river above Morelos Dam as is required by Point 1 of the }linute. The quantities of water delivered .