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<br />impacts to existing wetlands with their associated fauna and flora along the <br />creek. Cherry Creek's gradient may also experience changes as a result of the <br />dam's construction. This could lead 'to increB.sed headcutting on tributaries to <br />Cherry Creek. <br /> <br />Regarding cultural resources. two sites that: may be potentially eligible to <br /> <br />the National Register of Historic Places appear to be in the project area: the <br /> <br />Castlewood Dam and an Indian massacre site on Lake Gulch. Future studies in the <br /> <br />project area dependent on project aut:horizati,l>n include consultation with the <br /> <br /> <br />Colorado State Historic Preservation Officer, '" detailed search of all material <br /> <br /> <br />relating to the cultural resources in the urea, a pedestrian survey of the area, <br /> <br />and determination of eligibility for the Castlewood Dam and the massacre <br /> <br />site. <br /> <br />In swnmary, because of its location in an eastern E~xtension of the Rocky <br /> <br />Mountain foothills, the Castlewood State Recreation Area, and proposE!d project <br /> <br />site provides habitats normally found further west. This permits wildlife <br /> <br /> <br />normally associated with more montane areas to occur in the Cast:lewood area. As <br /> <br />such, the Castlewood area represents a fairly uniquE! complE!x of habitats. <br /> <br /> <br />Construction of a dam at Castlewood is likely to have significant nE!gativE! <br /> <br />impacts to wetland and riparian habi tats, and to a roul ti tude of plant and animal <br /> <br />species which exist at and below the normal project pool and, in flood <br /> <br />conditions. at and below the maximum project pool. These species could include <br /> <br /> <br />federally-listed threatened or endangered species. The existing landscape <br /> <br />aesthetics would also be impacted to a degree which is d.ependent on the final <br /> <br />project design. Noise, fumes, and fugitive dust would be associated with the <br /> <br /> <br />construction of the proposed project and could represent "n adverse impact during <br /> <br /> <br />the construction period by possibly disrupting park a.ctivities and public <br /> <br /> <br />recreation during this time. <br /> <br />ALTERNATIVE 6 - HARDEN DAM FACE <br /> <br /> <br />This alternative would include protecting 'I:he existing embankment crest and <br /> <br /> <br />downstream slopes from erosion caused by overflow of the dam during the PMF, <br /> <br />61 <br />