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<br />r- <br /> <br />Selection of a Specific Damsite and Reservoir - One or more specific dam <br />and reservoir sites should be selected in Clear Creek Canyon to provide a storage <br />capacity of at least 200,000 af. Minimum capital cost of the project should be <br />the principal consideration in this selection because environmental, <br />socioeconomic, and legal issues would be similar to most sites in the canyon. <br />The major influences on project cost would include the geology of both the dam <br />and the reservoir, and the cost of the road relocation alternatives. The location <br />of the proposed quarry in the canyon would limit the potential damsites to <br />upstream locations if the quarry is approved by Jefferson County. <br /> <br />GeoloQical InvestiQations - Additional geological investigations will be <br />required to select and confirm one or more specific dam and reservoir sites. <br />Pertinent geological issues to be addressed during the next level of study should <br />include the potential for reservoir seepage at locations of ancient faults and <br />at gravel terraces within the reservoir. <br /> <br />If the Centennial damsite is the site selected for further investigations, <br />then field studies should be conducted at the Black Hawk Fault to determine the <br />potential for reservoir seepage. Bedrock elevations should also be determined <br />at areas of terrace gravel s to determine the maximum recommended reservoir <br />elevation. Site-specific damsite geology should include subsurface investigations <br />to determine rock jOinting, weathering, and quality of rock. <br /> <br />Water Ouality - Investigation of the effect of a reservoir on the water <br />quality and, specifically, on the concentration of heavy metals should be <br />undertaken to confirm preliminary evaluations made during Step 1 studies. The <br />potential to establish a quality fishery in the reservoir and downstream of the <br />dam should be evaluated based on projected changes in water quality. <br /> <br />Determine Oooortunities for Recreation - Project related recreation <br />facilities would provide a source of local recreation for the Denver metropolitan <br />area and the local mountain communities. These facilities could be planned to <br />complement the existing Golden Gate Canyon State Park facilities and to encourage <br />day trips within Gilpin and Clear Creek Counties. Future studies should address <br />local recreation needs and plans for development to enhance tourism at these local <br /> <br />6-7 <br />