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<br />000506 <br /> <br />EFFECTS ON COLORADO RIVER AT IMPERIAL DAM <br /> <br />Estimated Stream Depletion (acre-feet/year) <br />Estimated Effect of Salt Loading (mg/l) 31 <br /> <br />PROJECTS COSTS (Oct, 1984 prices) <br /> <br />EstimAted construction cost <br />Estimated annual operation and maintenance cost <br /> <br />IlENEFITS <br /> <br />Estimated average annual benefits <br /> <br />80,900 <br />1.0 <br /> <br />402,360,000 <br />2,587,000 <br /> <br />19,880,000 <br /> <br />31 The 100-year average salt load concentrating effect is 1,0 mg/l, The <br />concentration diminishes to zero after 80 years of the project <br />operation. <br /> <br />8 <br />