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<br />( <br /> <br />-10-. <br /> <br />o <br />(-::) <br />~ <br />~ The Government of Mexico agreed to accept in effect, as a p~~t of <br /> <br />Q) <br />~ its treaty allotment, all drainage inflows to the river below nnperial <br /> <br />Dam except untreated Plel.lton-Nohawk drain waters. This includes the <br /> <br />delivery of 140,000 acre-feet annually, consisting largely of drain <br /> <br />water, near San Luis on the land boundary and in the boundary section <br /> <br />of the river downstream from Morelos Dam. <br /> <br />The Mexican Government also agreed to a mutual limitation of yround- <br /> <br />,rater pumping l'lithin five miles of the Arizona-Sonora boundary near <br /> <br />San Luis to 160,000 acre-feet annually on each side, pending the conclu- <br /> <br />sion of a comprehensive agreement on groundl'later pumping in border areas. <br /> <br />Mexico is already pumping at this rate, and as a consequence beginning <br /> <br />to draw on l'laters underlying the United States and to diminish the <br /> <br />surface flol'l to Nexico at San Luis. The agreement l'las phrased so that <br /> <br />the united States could without question pump a like amount on its side <br /> <br />to reduce the loss of underground l'laters and surface flows caused by <br /> <br />Mexican pumping. <br /> <br />Finally, the two Governments recognized the agreement as the <br /> <br />permanent and definitive solution of the salinity problem. They agreed <br /> <br />to consult with each other before undertaking any development of <br /> <br />surface or groundwater resources in the border area which might adversely <br /> <br />affect the .other country. <br /> <br />This agreement has very considerable advantages for the United States_ <br /> <br />Above all, it removes the uncertainties of the effect the salinity <br /> <br />problem might have caused on further development of the Colorado River <br /> <br />> <br />