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<br />. <br /> <br />to the southwest. The gradient of the river valley is generally <br />steeper upstream than it is at the reservoir site. At the proposed <br />reservoir site, the gradient of the Colorado River Valley is <br />approximately 0.2%. <br /> <br />Interstate 70, U.S. Highways 6 and 24, and the Denver and Rio Grande <br />Western (D&RGW) Railroad are parallel to the course of the river and <br />pass through cuts in the Webster Hill Ridge north of the dam site. <br /> <br />Both the hi ghways and the rai 1 road traverse the proposed impoundment <br />area and will require extensive embankment modification in order to <br />maintain both present alignments and provide adequate freeboard. <br /> <br />C. GEOLOGY AND SURVEYS <br />The geology of the area is described in Section IV and in Appendix A. <br /> <br />. <br /> <br />No topograph ic surveys were undertaken as part of thi s study. Topo- <br />graphic data for project development and feasibility determination <br />were obtained from mapping prepared by Analytical Surveys, Inc., 4167 <br />Sinton Road, Colorado Springs, CO 80907. This mapping was drawn to a <br />scale of 1 in = 200 ft and a contour interval of 2 ft. <br /> <br />D. LAND OWNERSHIP AND ACQUISITION <br />The reservoir, at a maximum normal pool elevation of 5,250 ft msl, <br />will inundate 915 acres of land. There are 12 separate land owners <br />who will be affected by construction of the project and are shown on <br />Figure S-3. The land owners and their approximate affected acreages <br />are listed below: <br /> <br />. <br /> <br />3686-a/5 <br /> <br />1-3 <br />