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<br />h. Division of Water Resources Projects <br /> <br />In August 1984 the Division of Water Resources (DWR) of the <br />State of utah made a determination which showed that about 15,000 acre-feet of <br />water would be depleted in 1985 by DWR sponsored projects. The division <br />estimates that depletions will increase to 28,000 acre-feet by 2020. <br /> <br />J-4 <br />-..l <br />CX) <br />r ,', <br />\,;..1 ; <br /> <br />i. Emery County Powerplants <br /> <br />Both units of the Huntington Powerplant of utah Power & Light <br />Company were in service in 1983. Water use records indicate that the <br />powerplant uses up to 12,000 acre-feet a year. Two units of the Hunter <br />Powerplant of Utah Power & Light Company, located near Castledale, were on <br />line in 1983. Water use records for this plant also indicate a maximum annual <br />use of about 12,000 acre-feet. One additional uni t ~ began operation in March <br />1983. Construction of the fourth unit has been suspended indefinitely. It <br />was assumed that each unit will require 6,000 acre-feet a year. These figures <br />result in an estimated 1985 use of 30,000 acre-feet. <br /> <br />Water from these two powerplants is and will corne from (1) the <br />purchase of 8,000 acre-feet of Emery County Project water, (2) purchase of up <br />to 24,000 acre-feet of private irrigation water rights, and (3) the <br />development of 3,000 to 5,000 acre-feet of new water made possible by <br />construction of Electric Lake Dam. Water surplus to powerplant needs is <br />leased back to the irrigation users. <br /> <br />j. Conversion of Irrigation to Power <br /> <br />Most of the water developed for the Emery County powerplants <br />comes from the purchase of irrigation water rights. It is assumed that for <br />every thousand acre-feet of diversion rights purchased and used by the power <br />company, irrigation consumptive use will decrease by 500 acre-feet. There are <br />some reasons to believe that irrigation use may not be declining by this high <br />rate. Additional data and analysis are needed to refine these estimates. <br /> <br />It is estimated that 18,000 acre-feet of diversion rights were <br />used by the plants in 1985. This translates into a decrease in irrigation <br />depletion of 9,000 acre-feet. <br /> <br />k. Other Utah Power & Light Company Powerplants <br /> <br />Utah Power & Light Company provided the values shown. <br />Locations of the new units will depend on how the loads develop. <br /> <br />1. Deseret Generation and Transmission Co-op <br /> <br />Deseret Generation and Transmission Co-op has begun <br />construction of a 400-MW unit east of Green River near Bonanza, Utah. <br />Commercial operation began in 1984. Water depletion is estimated at 6,000 <br />acre-feet with pumping from the Green River. Unit 2, also 400 MW, is <br />scheduled for operation in 1995. <br /> <br />VI-19 <br />