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<br />E. Description of Project: <br />This project calls for the replacement of the following facilities in Big Thompson <br />Canyon, Colorado: <br />(1) A concrete diversion dam destroyed by the flood. <br />(2) Approximately 1,700 lineal feet of 36" steel and concrete pipe destroyed by <br />the flood. <br />(3) Approximately 1,000 lineal feet of 36" wood stave pipe not damaged by the <br />flood, but requiring replacement due to age deterioration. <br />(4) A 900 kilowatt hydroelectric plant totally destroyed by the flood. <br />(5) An electrical substation and appurtenances servicing the power plant, totally <br />destroyed by the flood. <br /> <br />The dam will be a concrete gravity structure approximately 130 feet long and 35-45 <br />feet high at the center. It will serve as a diversion dam for the purposes of diverting <br />up to 74 cubic feet per second of water to the hydroelectric plant 1.6 miles downstream. <br />The elevation of the spillway will be established at 6,024 feet. The construction of the <br />dam will result in a reservoir containing approximately 85 acre feet of water. The <br />hundred year flood elevation in this area of the dam will be 6,031.5 and will spillover the <br />top of the dam without damage to either the dam or private property within the vicinity. <br />The Colorado Division of Highways plans to raise the elevation of U.S. Highway #34 <br />at the dam site from its present elevation of approximately 6,028 to approximately <br />6,045 to maintain adequate freeboard above the hundred year flood level. <br /> <br /> <br />The project area lies in the Big Thompson Canyon on the eastern flank of the northern <br />Colorado Rocky Mountains about 13 miles west of the City of Loveland, Larimer <br />County; Colorado. The rebuilt power plant and substation would be sited in the Big <br />Thompson Canyon in the northwestern quarter of Section 7, T. 5 N., R. 70W. The <br />dam would be located about 1.6 miles upstream to the west of the hydroelectric <br />plant. About 1,700 feet of the aqueduct would have to be rebuilt downstream from <br />the dam. (See Fig. 7). <br /> <br />The destroyed aqueduct to be replaced consists of 300 lineal feet of 36 inch concrete <br />pipe and approximately 1,700 lineal feet of 36 inch treated steel pipe running along the <br />river bank just east of the dam. In addition there is 1,000 lineal feet of wood stave pipe <br />farther downstream (several hundred yards south of the river) which was not damaged by <br />the flood but replacement is desired by the City of Loveland due to excessive pipe <br />leakage, caused by age deterioration. Funding for this 1,000 feet of replacement will be <br />provided by the City's Electrical Fund. <br /> <br />8 <br />