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<br />later Quality Operations <br /> <br /> <br />Illday at l.Ake Havllu Clt'j. <br /> <br />1C8 water quality aspects of Colorado RIver <br />eratlons are extensively descrIbed In the <br />3nnlal serleslJ.( f6?Of\-a en\\\\ed Qua\\ty at <br />ater, Colorado RIver Basin, only minimal <br />Jcusslon of this aspect of operatIon Is <br />esented In this report. Report No.11 of the <br />:tnnlal series was Issued In December 1982. <br /> <br />Iring water year 1982, the United States <br />passed a total at 145,000 acre-teet through <br />:t Bypass DraIn. This water was replaced <br />th a like amount of other water, pursuant to <br />Inute No. 242 of the International Boundary <br />d Water Commission. <br /> <br />\der the provisIons of Minute No. 242, the <br />lpubllc of Mexico Is entitled to receive at <br />orol09 Dam water of a Quality no worse than <br />5 parts per million (plm) ( 2: 30 p/m) <br />sater than that arriving at Imperial Dam. <br />Iring water year 1982, the average salinity <br />the Colorado River at Imperial Dam was 823 <br />m. DurIng that perIod the average salinity <br />the waters at More/os Dam was 938 p/m, <br />,ulllng In a salinity dlllerential at 115 plm, <br />thin the provision of MInute No. 242. <br /> <br />No large amount of Gila River Infiltration to . <br />the Wellton-Mohawk Irrigation and DraInage <br />District lsexpecled during water year 1983 <br />because no flood control releases from Painted <br />Rock Reservoir are anticipated to reach the <br />Colorado River, The total flows In the Bypass <br />Drain durIng water year 1983 are estimated to <br />be about 150,000 acre-.feet. No bypass waters <br />are expected to be returned to the Colorado <br />River below Moreles Dam during water year <br />1983, <br /> <br />In recognizIng the need to manage water <br />quality of the Colorado River, It has been <br />recommended that long..term salinity <br />Increases In the river be contrQH-ed through a <br />water quality improvement program generally <br />described in the"report, Colorado River Water <br />Quality Improvement Program, dated <br />February 1972, Bnd a status report of the same <br />title, deted January 1974, <br /> <br />The program calls for a basin-wide approach <br />to salinity control while the Upper Basin <br />continues to develop Its compact-apportioned <br />waters. The Initial step towards Improvement <br />of the quality of the river's water was <br />authorization by the Congress of the COlorado <br />River Basin Salinity Control Project (Public <br />Law 93-320), on June 24, 1974, <br /> <br /> <br />CuttIng e/l80e. <br /> <br />25 <br />