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<br />l'JATER nUAlITY EVAlUATIOfl_~~ <br />OF TH E ..----- <br />GRAND MESA PROJECT ~ <br />COLORADO <br /> <br />An evaluation of the Bureau of Recla~ation's proposed Grand Mesa <br />Project indicates that ~Iith adequate treatment muniCipal. indus- <br />trial and other domestic waste loadinqs should not siqnificantly <br />affect water quality for present and projected water uses in the <br />Project area. Therefore. no storage in Electric ~lountain and <br />Cactus Park Reservoirs is needed to provide flO\~ requlation for <br />maintaining satisfactory water quality in the Gunnison River. <br />The use of Project water for irrigation. municipal. and indus- <br />trial purposes ~/ill result in an estimated averaqe annual increase <br />of 3.0 nq/l in the total dissolved solids concentration of the <br />Colorado River at lake Mead. The economic impact of this salinity <br />increase upon water users below lake 1'lead is estimated to be <br />$205.000 annually. based on 1970 economic conditions. Control <br />measures are recolllMended for incorporation into the construction <br />and operati on of the Project to mi ti qate the adverse effects of <br />increased salinity. <br /> <br />R[ClJVFD <br />MAR 0'(' ~ <br />1972 <br />COLa <br />CONSERVA' WATER <br />TION BOARD <br /> <br />Envi ronmenta 1 Protecti on ^'lency <br />Re'li on VI II <br />Denver. Colorado <br /> <br />December 1971 <br /> <br />~ <br />