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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />002389 <br /> <br />needed for winter feed for livestock, It is anticipated that these <br />uses will continue and that most of the new lands to be irrigated <br />will be used for production of hay and pasture (1), It is possible <br />that some vegetable and garden crops for home consumption and corn <br />for livestock feed would be grown on the new lands. <br /> <br />F, Geology <br /> <br />The surficial geology, bedrock geology, geological hazards, and <br />mineral resources will all be discussed under this heading. Geological <br />studies at the dam site which have been made include investigations <br />during 1965 for the proposed Rangely Project; foundation investigations <br />of the dam site during the summer of 1972 under the direction of the <br />Colorado River Water Conservation District; and a field examination of <br />the site by a geologist in the spring of 1979 (1). <br /> <br />1. Surficial Geology <br /> <br />Bedrock in the proposed reservoir area is partially covered <br />with stream deposited alluvium, terrace deposits, alluvial fan material, <br />talus, slope wash and residual soils, In the valley bottom a mantle of <br />silty to cObbley alluvium covers the bedrock, Terrace deposits of <br />ancient gravels lie on highlands on either side of the White River (1), <br /> <br />The perimeter of the proposed reservoir varies from steep <br />sandstone cliffs and bluffs to low rolling hills eroded from the shales <br />of the Mesa Verde Group, There are no potentially unstable geologic <br />structures along the perimeter of the proposed reservoir (1). <br /> <br />The dip of the Mesa Verde Group in the reservoir area is a <br />few degrees to the northeast. Because of this direction of the dip, <br /> <br />II-9 <br />