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<br />C;J <br />C""': <br />~ <br /> <br />c: <br />C from the Colorado River for cooling purposes, and all blowdown <br /> <br />water therefrom will be evaporated in impervious ponds. The quan- <br /> <br />tity of salt that will thereby be removed from the river system is <br /> <br />about equal to the quantities involved at the Navajo Generating <br /> <br />Station. <br /> <br />It is of particular interest that the contracts for water <br /> <br />service for the Mohave Generatine Station involving the Department" <br /> <br />of the Interior through the Bureau of Reclamation, the Colorado <br /> <br />River Commission of Nevada, and the Southern California Edison Com- <br /> <br />pany essentially'prohibit the return of waste water to the river. <br /> <br />Conclusions and Recommendations <br /> <br />Based on the foregoing analysis, it is concluded that: <br /> <br />1. The salinity of the Colorado River will rise sharply in the <br /> <br />future in the absence of any salinity control measures. <br /> <br />20 While most individual development projeots will by themselves <br />not significantly affect the river's salinity, the cumulative effect <br /> <br />of all potential projects ~ithin the river basin ~ill produce the <br /> <br />significant increases forecast for the river. <br /> <br />3. All of the Lower Basin states will suffer continuous damages <br />from the rising salinity of the river and each has a stake in halting <br />such rises and improving the river's salinity. <br />40 The Navajo Generating Station will concentrate the river's salts <br />in the station's blowdown water which is estimated to contain, on the <br /> <br />average, up to 29,000 to 3LJ,,000 tons of dissolved solids per year. <br /> <br />5. The costs of removing these salts from the river system are in <br /> <br />the range of the cost of other potential salinity control projects. <br /> <br />" <br />-1..)- <br />