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<br />18G9 <br /> <br />. <br /> <br />through the Homestake Tunnel from December 2 through April 22. In addi- <br />tion to the Homestake imports, Busk-Ivanhoe imported approximately 3,350 <br />acre-feet of water through the Carlton Tunnel throughout the year and <br />1,160 acre-feet of water through Bous tead Tunnel duri ng May and June <br />(exhibit 6). Of the total 4,510 acre-feet, 430 acre-feet was stored for <br />the High Line Canal Company in the Pueblo Board of Water Works permanent <br />storage space and the remainder either $tored or flowed through <br />Turquoise Lake for the Pueblo Board of Water Works (2,008 stored) and the <br />City of Aurora (914 stored). The Project imported 2,150 acre-feet of <br />water through the Boustead Tunnel during water year 1987 and stored 298 <br />acre-feet under the East Slope Storage Decree. <br /> <br />Turquoise Lake storage was near capacity throughout the entire year. <br />Exhibits 7 and 8 show the precipitation and p~n evaporation at Turquoise <br />Lake. The water year ended with a content of 126,070 acre-feet in <br />s torage. <br /> <br />Table 5 and exhibit 9 show the operation of Turquoise Lake during the <br />water year 1987. <br /> <br />F. Mt. Elbert Conduit/Halfmoon Creek Diversion <br /> <br />During water year 1987, 35,720 acre-feet of water were released <br />from Turquoise Lake and 12,280 acre-feet of 'water diverted at Halfmoon <br />Creek Diversion through Mt. Elbert Conduit to Mt. Elbert Forebay <br />(exhibit 10). <br /> <br />G. Twin Lakes/Mt. Elbert Forebay and Mt. Elbert Pumped-Storage <br />Powerplant <br /> <br />On September 30, 1986, the lake surface elevation of Twin Lakes was <br />9196.30 feet with a content of 130,920 acre~feet of water. Mt. Elbert <br />Forebay water surface elevation was at 963~.46 feet with a content of <br />7,670 acre-feet. Exhibits 11 and 12 show ,the precipitation and pan eva- <br />poration at Twin Lakes. <br /> <br />Twin Lakes was operated throughout the year nearly full and <br />bypassing all native inflow. Beginning in March, the reservoir was <br />drawn down to prov i de storage space to better control releases at the <br />safe channel capac i ty below Twi n Lakes Dam duri ng the spring runoff. <br />The reservoir once filled in May, remained full until storable water <br />diminished. The demands on Twin Lakes increased and drew the reservoir <br />to 130,330 acre-feet by the end of the watet year. Table 6 and exhibit <br />13 show Twin Lakes/Mt. Elbert Forebay operatjon for water year 1987. <br />! <br /> <br />. <br /> <br />Mt. Elbert Pumped-Storage Powerplant had at least one unit available <br />throughout the water year. The powerplant had 48,000 acre-feet of flow <br />through water avail ab 1 e along with 123,900 acre-feet of water pumped <br />from Twi n Lakes. The powerp 1 ant generated 58,164,000 k i lowatt-hours <br />during water year 1987 with 165,630 acre-feet .of water (table 7). <br /> <br />. <br /> <br />10 <br />