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o o ('-,1 m .0 CoO estimate water yields for alternative Joint-Use Reservoirs and alternative Green Mountain Reservoir water exchange projects and to develop preliminary designs and cost estimates based on an approximately uniform level of investigation. This information is required prior to any decision on the next level of development of these projects. This Study has been conducted in three phases. In the first phase, existing data was collected and evaluated for initial screening of nine reservoir sites identified by the Authority as candidates for Joint-Use or Replacement Reservoirs. The candidate reservoir sites for this study were selected based on the existence of a water right or claimed water right at the site and previous studies conducted by the Colorado River Water Conservation District, the Denver Water Board, the U.S. Bureau of Reclamation and others. The site seiection was also based on geographic location within the Colorado River drainage. The reservoir sites are displayed on Figure 1.1. In conjunction with reservoir site evaluations, three alternative conveyance routes from Green Mountain Reservoir to Dillon Reservoir were appraised to determine a "Green Mountain Pumpback System" configuration as part of the Green Mountain Exchange Project. The screening resulted in the selection of a pipeline route along Colorado HighwllY 9 for conveyance of water from Green Mountain Reservoir to Dillon Reservoir, and selection of the following six reservoir sites for further study. o Wolford Mountain Site A' on. Muddy Creek o Wolford Mountain Site C on Muddy Creek o Red Mountain Site on the Colorado River o Azure Site on the Colorado River o Woicott Site on Alkali Creek o Una Site on the Colorado River The second phase consisted of hydrologic, operational and water rights analyses using a hydrologic simulation model. The third phase of the Study involved preliminary geotechnical investigations, core drilling at the Wolford Mountain Site A' and the Red Mountain Site, and subsurface investigation of the conveyance route. The third phase also included developing reconnaissance_level project designs, cost estimates ana cost-yield relationships for comparisons of alternative reservoirs and reservoir combinations. The Study is concluded with this Finai Report and Appendixes. A Summary Report, under separate cover, summarizes this Final Report. Recognizing 2