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<br />III. DESCRIPTION OF PROJECT AND STUDY AREA <br /> <br />Proposed Pr01ectDevelopment <br /> <br />The multipurpose project would provide storage for flood control, <br />recreation, fishery, water quality control, municipal water and irri- <br />gation. ~ supplemental irrigation water supply will be provided for <br />13,717 acres and full service water supply for 14,908 acres, primarily <br />located in Ouray County, Colorado (Figure 1, preceding back caver). <br /> <br />The principal feature of the project is Ridgway Reservoir. <br />Ridgway Dam will consist of two sections-- a dam on the Uncompahgre <br />River and a dike on Dallas Creek. The water behind each structure <br />will merge to form one reservoir. Total capacity of the reservoir <br />will be 140,000 to 150,000 acre-feet and will inundate the present <br />,I town of Ridgway, Colorado. <br /> <br />Dallas Divide Reservoir will be located on Pleasant Valley Creek, <br />a tributary of Dallas Creek. This reservoir will have a capacity of <br />17,200 acre-feet. A canal will collect surplus flows from the head- <br />waters of several tributaries of Dallas Creek for storage in Dallas <br />Divide Reservoir. Water will be conveyed by canal from this reservoir <br />to project lands on Upper Log Hill Mesa. Also, a portion of the water <br />stored in Dallas Divide Reservoir would supplement the water supply <br />for presently irrigated lands in the pleasant Valley and Dallas Creek <br />area. <br /> <br />Turbine pumping will be used to pump water from Ridgway Reservoir <br />to a canal on Log Hill Mesa. The pumping capacity will be 195 cubic <br />feet per second (cfs). For each cfs pumped to Log Hill Mesa, about <br />3 to 4 cfs will be released to the Uncompahgre River. During the <br />irrigation season a minimum of 320 cfs will be maintained in the <br />Uncompahgre River at Colona, Colorado, while during the winter the <br />flow at this point will average 50 cfs. <br /> <br />The Sneva Reservoir, to be located at an off-stream site between <br />Cow Creek and Dry Creek, will have a capacity of 900 acre-feet. This <br />reservoir is to supply the presently irrigated lands in the Cow Creek <br />area with a full irrigation water supply. <br /> <br />The Tri-County Water Conservancy District has requested 15,000 <br />acre-feet of yield from Ridgway Reservoir for municipal and industrial <br />purposes under provisions of the Water Supply Act of 1958. This water <br />would be provided for the towns of Montrose, Olathe, and Delta, <br />Colorado. <br /> <br />1 <br /> <br />6 <br />