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<br />I, <br />[I <br />I <br />, <br />i <br /> <br />[ <br />I <br /> <br />" <br />, <br /> <br />-; <br /> <br />t <br />,-.J <br />.--:.1 <br /> <br />r <br />Ji. <br /> <br /> <br />L <br /> <br />-'.'...; <br /> <br />r <br /> <br />o <br />o <br />(-, <br />0"l <br />~ <br />....... <br /> <br /> <br />1.0 INTRODQCTXON <br /> <br />1.1 PROJEtT BACKGROUND <br /> <br />This. study of .the Joint-use Reservoir and Gre,enMountainExchange <br />Projects was initiated by.the Colorado Water Resources and Power <br />Development l\.uthority at the request ,of the Colorado River Water <br />Conservation' District (CRWCD) and the Boa:rd of Water Commissione.rs <br />j;,or the city and County' PfDenver(DWB). It is intended to provide <br />reconnaissance.,.level engineering and hY,drology information on the <br />Projects. <br /> <br />The objective of thE! Joint-use Reservoir project is. to 'provide <br />additional. wati!lr to. Western ColoradO and :the Denver Metropolitan <br />Area. The reservoir ( s) designed to meet this need should have the <br />capability and flexibility to increase the firm annual yield of the <br />Dillon Reservoir/Roberts Tunnel System by abollt 15,000 acre-feet <br />(af) and provide, about 15,000 af of firm annual yield for use. in <br />Western Colorado. . Eor the purpose. of this. study, the firm annual <br />yield is defined as the constant volume of water that can be <br />supplied every year without any shortage during th<;l study period of <br />1951 through 1983. <br /> <br />The Green Mountain Exchange Project is intended asa potential <br />alternative to previously identified water diversion and stora.ge <br />proj ects. Theobj ecti ve of this exchange is to provide additional <br />water to Dillon Reservoir and the Denve,rMetropolitan Area. This <br />would be accomplished byreg-ulatingexisting flows and by pumping <br />water directly from Green Mountain Rese:!:'Voir. to Dillon Reservoir <br />while providing'. a . new reservoir{s) to. . replaoe the existing <br />functions of Gree~ Mountain Reservoir. <br /> <br />The study. has been conducted in three phases. The Phase 1 <br />investigation was to, oollect and. evaluate . existing data on nine <br />candidate reservoir. sitesfo,r initial. screening purposes. Reservoir <br />1-1. <br />