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<br />W <br />--.l <br />--.l <br />(]) <br /> <br />--,' - <br /> <br />The diversion structure would be located on McElmo Creek, just <br />down~tream from its confluence with Mud Creek. A 40-ft3/s pumping <br />plant located at the diversion dam would move the water through <br />5 miles of 36-inch pipe to Navajo Draw. At this point, it would be <br />released to flow open channel down Navajo Draw. <br /> <br />About 19 miles down Navajo Draw, the water would be collected in a <br />2,50~-acre-foot regulation reservoir. At this point, makeup flows <br />from,the Mancos River would be diverted into the reservoir to compen- <br />sate,for any shortage of McElmo Creek water. A 25-ft3/s pumping <br />plant would raise the water 564 feet out of the Mancos River drainage <br />and into the San Juan River drainage. The saline water would travel <br />32 miles in a pipeline and be lifted another 680 feet in three lifts <br />before it empties into Morgan Lake, the cooling reservoir for the <br />Four:Corners Power Generating Station. Before entering the lake, <br />the water would be filtered, treated, and softened to meet cooling <br />tower criteria. <br /> <br />The system would operate with 100 percent McElmo flows 60 percent of <br />the ~ime. During the winter months, completely depleting McElmo <br />Creek could only provide 65 percent of the system's capacity. During <br />these low flow months, the Mancos River or the San Juan River could <br />make ,up the difference. The diversion from the Mancos River could <br />comp1ietely deplete it during December and January. <br /> <br />System costs were developed to the powerp1ant boundary. As shown in <br />tabl~ 17, a 50-year service life was used as it most closely reflects <br />utility and pipeline service lives. No incremental costs for saline <br />water; cooling within the powerplant boundaries are included here but <br />are included in chapter VI on savings for joint use, <br /> <br />V-ll <br /> <br />