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O~~1"1 l..r:~'t... 34/Friedkin Lopez Mateos to announce jointly in March. 1962. that there was an urgent need for a mutually satisfactory solution. and that they would call upon water and soil scientists of the two countries to assist the International Boundary and Water Commission in adopting remedial measures. The two presi- dents met again in June. 1962. noting that measures had been taken to reduce the salinity of the waters delivered to Mexico. and expressing their determination to reach an early. perma- nent solution. In April and May. 1962. a panel of United States scientists selected by the Secretary of the Interior met with a similar panel of Mexican scientists. The panels were unable to agree on a joint report for solution of the problem. however. because they eould not develop a joint technical solution with- out prejudice to the legal position of one country or the other. TheFNe-Yeu~eement In 1965. the International Boundary and Water Commis- sion recommended measures to reduce the salinity of the water delivered to Mexico. based on the two panels' discussioI1$. stud- ies by the Bureau of Reclamation. and eonsultations with Mex- ican officials. The two governments approved the recommen- dations in a Five-Year Agreement (later extended one year). re- ferred to as the Commission's Minute No. 218.5 The agreement provided for the following measures: 1. Construction by the United States of an extension to the Wellton-Mohawk District's drainage channel. to enable the discharge of the District's drainage waters to the Colorado River either above or below'Morelos Dam. Mexico's major point of diversion. 2. Discharge of all Wellton-Mohawk drainage waters be- low Morelos Dam, except those which Mexico requests to be discharged above the dam. 3. During at least ninety days in the winter months of minimum deliveries to Mexico. the United States was to pump the most saline waters from the District from existing and new drainage wells and discharge them to the river below Morelos Dam, making up Mexico's scheduled deliveries from other wa- ters in the river. Under the 1965 agreement. the annual average salinity of the waters delivered to Mexico gradually improved. from about 1.370 ppm in 1965 to 1.240 ppm in June 1971. But because Mex- ico determined in 1965 that its farmers should not use waters of salinity higher than about 1.200 ppm, 40.000 to 75.000 acre- . <.-r. feet annually of Wellton-Mohawk drainage waters were not used by Mexico, but were bypassed to the river below Morelos Dam. This operation enabled Mexico to reduce the annual av- erage salinity of waters diverted to about 1.160 ppm in 1971.