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<br />Meridian. The dam would be located about 300 feet (91m) upstream from <br />the confluence of Taylor Draw with the White River. The project is <br />located in the northwest corner of Rio Blanco County in State of <br />Colorado Planning and Management Region 11. <br />2„2.1.2 The reservoir capacity is 13,800 acre-feet (AF] [17 X 106 m3) <br />at the normal high water line, elevation 5317.5 feet MSL.(1621m). The <br />surface area of the reservoi r at high water is about 615 acres <br />[2491~a) ~ A proposed dead poo L storage volume of 2100 acre-feet (2.59 <br />K X 10 m ) would inundate approximately 257 acres (104he) et elevation <br />5290 feet MSL (1612m]. <br />2„2.1.3 Approximately 3,500 lineal feet (1036m) of Colorado State <br />Highway (CSH] 64 would require relocation to accomodete the reservoir. <br />A portion of 10-inch (25cm) gas pipeline, powerline and telephone line <br />would have to be relocated above the high water line. Figure 2 - 1, <br />show the location and the pertinent information for Alt erne tive A. <br />2.2.2 Construction Methods,,, Features and Schedule <br />2.2.2.1 Dam Design - The dam would be a zoned earthfilled 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 Earthr panels used to form the spillway. The Reinforced <br />Earthr 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 9m). <br />Thee abutments would be stripped of overburden and embankment materiel <br />keyed into them to form a positive cutoff to protect and limit the <br />seepage through the abutments. The leveling pads for the Reinforced <br />Earth wall would be reinforced concrete lying directly on and keyed <br />into the bedrock. See Figure 2 - 3 for construction schedule. <br />2.2.2.2 Spillway Design - The State of Colorado has approved a <br />spillway capacity of 65,300 cfs (1849 m3/s) for Alternative A. The <br />spillway would consist of a concrete apron, ogee crest and flip <br />bucket, and the vertical downstream face formed by Reinforced Earthr. <br />Water would cascade over the crest and flip into the ei r before <br />dissipating in the 10-foot (3m) deep plunge pool at the base of the <br />dam. The water would then reenter the original channel and continue <br />downstream. The elevation of the lip of the flip bucket would be <br />5307.5 feet MSL [1618m) with the normal water surface of the plunge <br />pool at 5,265 feet N~SL [1605m). The spillway would contain 1,920 <br />cubic yards (1468 m ) of reinforced concrete and would be 504 feet <br />(154m) Long. The difference in elevation between the spillway crest <br />1 and the crest of the dam-would be 11.5 feet (3.5m). <br />2.2.2.3 Outlet Works - The outlet works would consist of an intake <br />structure with an emergency s li de gate connected to a 6-foot (1 .Bm) <br />diameter conduit ending in the gate structure and stilling basi~. The <br />outlet works are designed to pass approximately 1,100 cfs (31 m /s) et <br />elevation 5317.5 feet (1621m). The conduit would be sized to <br />-g- <br />