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* CO ao RtA D 0 Evans Reservoir Bypass Flume Replacement <br /> CO Conservation Board Parkvi lle Water District <br /> H „,,.,,, September 2015 Board Meeting <br /> L 0 A N D E T A I L S <br /> $533,430 Ili <br /> Project Cost: r1� 11 . <br /> CWCB Loan (with Service Fee): $181,800 s � <br /> Loan Term and Interest Rate: 10 Years C� 1.95% " c <br /> Funding Source: WSRA ft Sev. Tax Perpetual Base Fund I <br /> B O R R O W E R T Y P E +1 11141111* <br /> Agriculture Municipal Commerciale <br /> 0% 100% Low - 0%Mid - 0% High 0% <br /> P R O J E C T D E T A I L S <br /> Project Type: Municipal Et Industrial r. <br /> Average Annual Delivery: 1, 00 AF <br /> The Evans Reservoir Bypass Flume, constructed around 0 C A T I 0 N <br /> 1904, is a wooden trough measuring 6' x 5' x 450', County: Lake <br /> including inlet and outlet structures. The flume carries Water Source: Evans Gulch <br /> Evans Creek contaminated water around Evans Reservoir Drainage Basin: Arkansas River <br /> and through the dam. <br /> Division: 2 District: 11 <br /> Annual maintenance of the wooden structure has <br /> required increasingly heavy efforts and expense. Heavy runoff events in the last several years have <br /> caused the condition of the flume to become an extremely urgent situation. 8,000 acres of deep snow <br /> must be channeled through the flume during spring runoff each year. In the spring of 2014, sudden <br /> runoff combined with spring rains resulting in an unusually high snow melt. The flume was nearly <br /> overwhelmed and the portion that passes over the abutment of the dam failed. Fairly serious erosion of <br /> the dam resulted, but emergency repairs prevented further damage and contamination of the water <br /> supply. Runoff in 2015 was unusually high as well, due to the amount of snowfall in April and unusually <br /> warm temperatures in June, necessitating emergency action again. The State Engineer's Office has <br /> strongly recommended that the flume ben replaced. This project proposes a buried pipeline toi replace <br /> the flume. Concrete inlet and outlet structures will be constructed, and a trash rack will be installed at <br /> the inlet. <br /> The two primary objectives of the project are to protect water quality for the City of Leadville, and to <br /> prevent failure of the Evans Reservoir dam. <br /> ti <br /> . kIL Pc+e <br /> a i : e Mu.RAl:.I. <br /> f� <br /> - <br /> w <br /> � w <br /> / Vki <br /> $4F fir" 4. <br /> fir" �, , s <br /> ' A Y rya l .j 'k 's` M <br /> n <br /> Water Project Loan Program - Project Data Sheet <br />