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.1)-. \.> ( 'f ~'.-' . -l/ /'-' ,'.' t J. '2. 't ~r;~ I I I I I I I I I I ~I I I I I I I I I are anticipated to be around 49,200 acre-feet under most probable conditions ., during this water year. D. Turouoise lake ~~v~ Inflow to Turquoise lake for WY 1991 will be from four sources: Busk- r.;> $I r' Ivanhoe imports; Fryingpan-Arkansas Project imports; Homestake Project I:>.) (',\), imports; and native flow of lake Fork. Estimates of inflow from Busk- f A I Ivanhoe and native lake Fork were made using historical records and -.rJI 'r,,-. probability analysis. Project water imports are estimated to be 49,200 acre-feet. Homestake Project does not plan to import any water ~o,,^o''I-''\.~ stored in Homestake Reservoir during water year 1991. The planned operation of Turquoise lake for water year 1991 will be to maintain the reservoir as near capacity as possible by the storage of Project imports and Busk-Ivanhoe imports. IScfJ!" -- C~'ll..fr \~~ ;1;, ,\" '\ --'~'. ~'\ \j<\.y ,;; ,: I ~ 8.. ,,' ,\Vl~ , ~~ . V!e ~~~'1J . The Pueblo Board of Water Works and the City of Aurora each own one-half of the Busk-Ivanhoe imports. The Board's water will either be bypassed through Turquoise lake for storage in Clear Creek Reservoir (by exchange with native water) or for direct flow usage at Pueblo or be stored in their long-term storage space in Turquoise lake. The, City of Aurora water will be stored in their long-term storage space. The city of Colorado Springs can store all of the native inflow to Turquoise lake when they are in priority (maximum of 17,416 acre-feet). Water rel eased from Turquoi se lake in excess of ei ther instream minimum flow or flow to meet downstream senior rights along lake Fork will be diverted into the Mt. Elbert Conduit. The water will flow through Mt. Elbert Powerplant and then be released to the Arkansas River from Twin lakes via lake Creek. The minimum release into lake Fork is 15 ft3/s, or natural inflow, whichever is less. Table 16 and exhibit 22 show the proposed operation of Turquoise lake in WY 1991. E. Federal Fish Hatcherv and Halfmoon Creek Diversion The Federal Fish Hatchery near leadville, Colorado, will be supplied flow-through Project water at a rate of up to 6.7 ft3/s as has been done in past years. This flow is released from Turquoise take through Mt. Elbert Conduit to the fish hatchery and then into the Arkansas River. The flow is later stored, less appropriate transit losses, in Pueblo Reservoir. The planned operation of Halfmoon diversion is to divert all the flow in Halfmoon Creek, to the maximum diversion capacity of 150 ft3/s, which is in excess of the downstream call on Halfmoon Creek or the instream minimum flow. At times, this diversion flow may be restricted due to operational releases from Turquoise lake into Mt. Elbert conduit. The diverted flow plus the release will pass through Mt. Elbert Powerplant and will then be released to the Arkansas River via lake Creek. 32