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<br />2.2.1.3 <br />Highway <br /> <br />Approximately 3,500 lineal feet (1036 <br />(CSH) 64 would require relocation <br /> <br />m) of Colorado State <br />to accommodate the <br /> <br />reservoir. A portion of la-Inch (25 cm) gas pipeline, powerllne, and <br />telephone line would have to be relocated above the high water line, <br />Figure 2 - 1, shows the 1 ocat Ion and the pert I nent I nformat Ion for <br />Alternative A. <br /> <br />2.2.2 Construction Methods, Features and Schedule <br /> <br />2.2,2.1 Dam Design - The dam would be a zoned earthfllled dam <br />containing approximately 265,700 cubic yards (203,141 m3) of <br />materials. The unique feature of the dam would be the downstream <br />face, which for a portion of the dam would consist of vertical <br />Reinforced Earth(r) panels used to fonm the spillway. The Reinforced <br />Earth(r) walls are a patented process. Figure 2 - 2 Is a conceptual <br />drawing of the dam In place. The dam would have a cutoff trench Into <br />the bedrock with the overburden varying from 10 to 30 feet (3 to 9 m). <br />The abutments would be stripped of overburden and embankment material <br />keyed Into them to fonm a positive cutoff to protect and limit the <br />seepage through the abutments, The leveling pads for the Reinforced <br />Earth(r) wall would be reinforced concrete lying directly on and keyed <br />Into the bedrock. See Figure 2 - 3 for construction schedule. <br /> <br />2.2.2.2 <br />spillway <br />spillway <br /> <br />Spillway Design - The State of Colorado has approved a <br />capacity of 65,300 cfs (1849 m3/s) for Alternative A. The <br />would consist of a concrete apron, ogee crest and flip <br /> <br />bucket, and the vertical downstream face fanned by Reinforced <br />Earth(r), Water would cascade over the crest and flip Into the air <br />before dissipating In the 10-foot (3 m) deep plunge pool at the base <br />of the dam. The water would then reenter the original channel and <br />continue downstream, The elevation of the lip of the flip bucket <br />would be 5307.5 feet MSL (1618 m) with the nonmal water surface of the <br />plunge pool at 5265 feet ~1SL (1605 m). The spillway would contain <br />3 ' <br />1920 cubic yards (1468 m ) of reinforced concrete and would be 504 <br />feet (154 m) long, The difference In elevation between the spillway <br />crest and the crest of the dam would be 11.5 feet (3.5 m). <br /> <br />12 <br />