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<br />. <br /> <br />COLORADO WATER CONSERVATION BOARD <br />721 State Centennial Building <br />l313 Sherman Street <br />Denver. Colorado 80203 <br /> <br />Sheriff Reservoir project <br />(Town of Oak Creek) <br /> <br />Introduction <br /> <br />Sheriff Reservoir is owned by the Town of Oak Creek. It is <br />located on Trout Creek about 13 miles southwest of that town. <br />Sheriff Dam. which impounds this reservoir. is 58 feet in <br />height and has a crest length of 630 feet. The reservoir has a <br />capacity of 987 acre-feet at the normal maximum water surface <br />elevation. It serves solely as a raw water storage facility <br />for Oak Creek. <br /> <br />Problem <br /> <br />. <br /> <br />In October. 1985. the State Engineer advised the town that <br />the spillway for Sheriff Reservoir was too small and that <br />unless it was enlarged by the end of 1986. the storage capacity <br />would be restricted to 567 acre-feet. Such a restriction would <br />jeopardize the adequacy of Oak Creek's water supply. <br /> <br />The town had a feasibility study prepared to address this <br />problem. The study was performed by Geotechnical Engineers. <br />Inc.. of Englewood. and is the basis for the recommendation on <br />this project. <br /> <br />Proposed Project <br /> <br />The engineering consultant investigated four alternatives <br />for resolving the problem at Sheriff Reservoir. The selected <br />alternative is one which would improve the access road to the <br />dam. install an underdrain system at the toe area of the dam. <br />construct a soil cement spillway to pass the probable maximum <br />flood. raise the existing embankment 4 to 5 feet in order to <br />store the full decreed capacity of 987 acre-feet. and make <br />minor modifications to the existing outlet works. The total <br />estimated cost of this project is $600.000. <br /> <br />2365E <br /> <br />. <br />