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<br />OOC499
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<br />I~TRODUCTION
<br />
<br />The Dolores Project, located in the Dolores and San Juan River Basins in
<br />southwestern Colorado, will develop water from the Dolores River for
<br />irrigation, municipal and industrial (M&I) use, recreation, fish and
<br />wildlife, and production of hydroelectric power, It also will provide flood
<br />control and aid in economic redevelopment. Service will be provided to the
<br />Dove Creek area, central Montezuma Valley area, and south to the Towaoc area
<br />on the Ute Mountain Ute Indian Reservation.
<br />
<br />PLAN
<br />
<br />Primary storage of Dolores River flows for all project purposes is provided
<br />bv McPhee Reservoir, formed by McPhee Dam and Great Cut Dike. Dawson Draw
<br />Reservoir, located west of McPhee Reservoir, will be constructed specifically
<br />for fish and wildlife enhancement and will be supplied primarily from
<br />irrigation return flows.
<br />
<br />An avera~e annual supply of 90,900 acre-feet of water will be provided to
<br />27,928 acres of full service land in the Dove Creek area, 7,500 acres of full
<br />service land in the Towaoc area, and 26,300 acres of supplemental service
<br />land in the Montezuma Valley area. Water for the Dove Creek area will be
<br />pumped from McPhee Reservoir by the Great Cut Pumping Plant and conveyed 32,8
<br />miles through the Dove Creek Canal and its 6,9-mile branch, the South Canal,
<br />Water for the Towaoc area will be conveyed 48 miles from the reservoir by the
<br />Dolores Tunnel and the Dolores and Towaoc Canals, Both areas will be served
<br />by sprinkler irrigation systems. The Montezuma Vallev area will be served by
<br />releases at Great Cut Dike and the Dolores Tunnel and Canal to an existing
<br />~ravity distribution system.
<br />
<br />Powerplants will be located on McPhee Dam and Towaoc Canal to generate an
<br />annual average of 37,488,000 kilowatt-hours of electricity which will enter
<br />the Colorado River Storage Pro)ect power transmission system, The McPhee Dam
<br />facility will operate year-round on fishery releases from McPhee Reservoir,
<br />while the Towaoc Canal plant will operate from April to October on the
<br />irri~ation water supply conveyed through the canal,
<br />
<br />MCPHEE DAM A1~ RESERVOIR AND GREAT CUT DIKE
<br />
<br />McPhee Dam, located on the Dolores River, is a rolled earth, sand, gravel,
<br />and rockfill structure with a volume of approximately 6,230,000 cubic vards,
<br />The crest of the dam is 270 feet above streambed, 1,370 feet in length, and
<br />30 feet wide. A gated spillway located in the right abutment includes a
<br />concrete chute leading to a stilling basin, The outlet works, located in the
<br />left abutment of the dam, has two separate intake structures, and a total
<br />capacity of 5,000 cubic feet per second.
<br />
<br />Great Cut Dike is a rolled earthfill structure with a crest length of 1,900
<br />feet, and crest width of 30 feet. It has a maximum height of 64 feet above
<br />the original ground surface. The embankment has a volume of about 189,000
<br />cubic yards.
<br />
<br />McPhee Reservoir has a total capacity of 381,000 acre-feet, including 229,000
<br />acre-feet of active capacity, 152,000 acre-feet of inactive capacity, and 100
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