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<br />W <br />-.J <br />"-l <br />CJl <br /> <br />for <br /> <br />Table 16. - Summary of capital costs <br />softening and delivering LaVerkin Springs Unit water <br />to the proposed Warner Valley Powerplant <br /> <br />Item <br /> <br />Cost ]j <br /> <br />Subtotal <br /> <br />$ 5,750,000 <br />1,140,000 <br />10,330,000 <br />180,000 <br />4,300,000 <br /> <br />$21,700,000 <br /> <br />2,604,000 <br /> <br />$24,304,000 <br /> <br />$ 2,035,000 <br /> <br />1,100,000 <br /> <br />$ 3,135,000 <br /> <br />Y $ 392,000 <br /> <br />Collection system <br />Filtration and treatment <br />Pipeline and pumping plant <br />O&M equipment <br />Mi t i gat ion plan <br /> <br />Interest during construction <br /> <br /> <br />Total capital costs <br /> <br /> <br />Annual equivalent costs <br /> <br /> <br />O&M costs for saline water supply <br /> <br /> <br />Total annual cost <br /> <br />Cost-effectiveness per mg/L <br /> <br />1/ Based on January 1980 prices. <br />2/ Based on an annual equivalent reduction in salinity at <br />Tmperial Dam of 8.0 mg/L. <br /> <br />McElmo Creek Unit. - A study was conducted which evaluated the poten- <br />tial use of sallne water from McElmo Creek and delivery to the Four <br />Corners Powerplant (2,175 MW) for powerplant cooling [23], <br /> <br />Historically, McElmo Creek was an intermittent stream. Only since <br />the advent of irrigation has it become perennial, An 8-year average <br />of the flow is 32,500 acre-feet at 2,700 mg/L of TDS (115,000 tons of <br />salt) , <br /> <br />The candidate study was designed to provide 20,000 acre-feet of <br />saline water annually to the Four Corners Powerplant site. About <br />60,000 tons of salt per year would be prevented from entering <br />the Colorado River system. The net effect of the salt removal at <br />Imperial Dam would be 6.0 mg/L. <br /> <br />V-10 <br />