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<br />EXECUTIVE SUMMARY <br /> <br />,- <br /> <br />The evaluation of the Joint-Use Reservoir and Green Mountain Exchange Projects (Study) <br />was initiated by the Colorado Water Resources and Power Development Authority (Authority) at the <br />request of the Colorado River Water Conservation District (CRWCD) and the Board of Water <br />Commissioners for the City and County of Denver (DWB). The projects designated for investigation <br />evolved from two concepts advanced to resolve the problems associated with increasing water <br />demands in the Denver Metropolitan area and the concern over water supplies on the western slope <br />of Colorado. The concepts are: <br /> <br />- <br /> <br />o <br /> <br />Joint-Use Reservoir: A reservoir which would be capable of providing about <br />30,000 acre-feet (af) of water per year for east slope and west slope use, and <br /> <br />o Green Mountain Exchange: A water exchange project that would utilize Green <br />Mountain Reservoir, a Replacement Reservoir, and a pump and pipeline <br />system to increase the water supply to Roberts Tunnel. <br /> <br />- <br /> <br />Both concepts would require new reservoirs to regulate flows in the Upper Colorado River <br />Basin. The Joint-Use Reservoir Project would retain snow-melt runoff to provide additional water for <br />use in western Colorado and would partially relieve Dillon Reservoir of its obligation to release water <br />to meet downstream water demands. The Green Mountain Exchange Project would replace the <br />required releases from Green Mountain Reservoir with releases from a new Replacement <br />Reservoir(s) and permit water stored in Green Mountain Reservoir to be pumped upstream to Dillon <br />Reservoir. The increase in water in Dillon Reservoir due to either project could be diverted to the <br />Denver Metropolitan area through the Roberts Tunnel. <br /> <br />PROJECT STUDY <br /> <br />Study of the Joint-Use Reservoirs and Green Mountain Exchange Projects began in June <br />1985, when Boyle Engineering Corporation (Boyle) entered into contract with the Colorado Water <br />Resources and Power Development Authority. The purpose of this technical Study has been to <br /> <br />1 <br /> <br />'"""" <br />I <br />