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<br />, <br /> <br />(5) e1.ectricaJ. anaJ.og studies are under ~ to determine optimum <br />velllocations, pumping schedules, and optimum location of ti1.e <br />drains; (6) laboratory model studies are under ~ to determine <br />potentiaJ. salinity of tUe drain effluent. <br />In sUllllllBry, these combined studies iDdicate that through a <br />change in cropping pattern and se1.ective pumping, peek salinities of <br />the water delivered to Mexico can be held within the limits indicated <br />above, and that the soils in the Mexicali Valley can be irrigated <br />safe~ with the resulting Colorado River waters that would be <br />delivered to Mexico. <br />B. ConclusioDs <br />1. GeneraJ.. The proposed plans are in accord with Congressional <br />directives and the terms of the Water Treaty of 1944. The plan of <br />se1.ective pumping presented in Part VII of this report is engineer- <br />ingly feasib1.e and vi.ll provide a reduction in the peek dissolved <br />solids concentrations in Colorado River water delivered to Mexico <br />at Morelos Dam. If' Phase 1 construction is authorized by March 1963 <br />and a crash program initiated, construction can be substantialJ.y <br />completed by October 1963 and the peek salt concentrations reduced <br />to approx:l.lllate~ 2,000 ppm during the winter of 1963-64. <br />Construction of yorks contemplated in Phase 2 vill reduce the <br />peek salinity concentrations in water delivered to Mexico to about <br />1,800 ppm, provide flood protection to project works, reduce non- <br />beneficial phreatophyte uses, and provide better regulation of water <br />deliveries to Mexico. <br />Phase 3 construction v1ll provide integratioD of ground-water <br />pumping with the river regulation provided by Senator Wash Regulatory <br /> <br />'I <br /> <br />[J <br /> <br />v <br />