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<br />'~ <br />"":} <br />~ <br /> <br />-.J <br />W <br /> <br />Horsetooth Dam and ~atanka Dike (1946-1949) were constructed <br />to close the valley pt the north end of the reservoir. The dam is <br />an earth and rockfil1 type structure ~ith a maximum height of 154 <br />feet, a crest length of 1.,600 feetJ a.nd a volume of 1,872,000 cubic <br />yards 0 The main reservoir outlet is located in this dam 0 This out- <br />let consists of an 805-foot diameter concrete conduit, extending <br />from an inlet trashrack structure in the reservoir to a gate-chamber <br />located beneath the dam, and a twin 10-foot by 10-foot horseshoe- <br />shaped conduit extending from the gate-chamber to a valve house and <br />stilling basin at the base of the damo Two 72-inch diameter steel <br />pipesJ installed in the t~1n conduits, extend from two 5-foot by <br />5-foot high-pressure slide gates in the gate-chamber to two 72-inch <br />hollow-jet valves in the valve house. The outlet has a capacity of <br />2,500 cfs at reservoir stage 5430. Satanka Dike, located about 400 <br />f8et west of Horsetooth Dam, is an earth and rockfill type structure <br />with a maximum height of 20 feet, a crest length of 350 feet, and a <br />volume of 5,000 cubic yardso This dike, with its crest four feet <br />lower than that of the dams, serves as the emergency spillway for <br />the reservoiro <br /> <br />Soldier Canyon Dam (1946-1949) closes a natural opening <br />in the east hogback ridgeJ about 4JOOO feet sffi1theast of Horsetooth <br />Dam. It is an earth and rockfill type structure ~Qth a maximum <br />height of 234 feet, a crest length of 1,424 feet, and a volume of <br />3,222JOOO cubic yardso An outlet tunnel through the right abutment <br />of the dam leads from an inlet trashrack structure in the reservoir <br />to a valve house and stilling basin located at the base of the dam. <br />Upstream from a centrally located gate-chamber, the tunnel is 5 <br />feet in diameter and 490 feet longo Downstream, the tunnel consists <br />of a 6-foot by 6-foot horseshoe-shaped section, 703 feet longo A <br />30-inch diameter steel pipeJ installed in this section of the tunnel, <br />extends from the gate-chamber to the valve houseo Outlet discharges <br />are regulated by a l4-inch hollow-jet valve located in the valve <br />house and a 24-inch wedge-gate valve installed in the gate-chamber. <br />The outlet capacity is 80 cfs at reservoir stage 54300 <br /> <br />Dixon Canyon Dam (1946=1949), ~TIich closes a natural <br />opening in the east hogback ridge; is about 206 miles south of <br />Soldier Canyon Dam 0 It is an earth and rockfill type structure <br />with a maximum height of 240 feet, a crest length of 1,235 feet, and <br />a volume of 2,940,000 cubic yards. <br /> <br />Spring Canyon Dam (1946-1948), which closes the remaining <br />gap in the east hogback, is about 107 miles south of the Dixon <br />Canyon Dam and about 500 mi..1es southeast of Horsetooth Dam. It is <br />an earth and rockfill type structure with a maximum height of 215 <br />feet~ a crest length of 1J150 feet, and a volume of 2,040,000 cubic <br />yardso <br /> <br />Dixon Feeder Cana~ under con struction east of Horsetooth <br />Reservoir, wUl have a capacity of 8 efs and a length of approxi- <br />mately 300 mileso This canal leads from the reservoir outlet at <br /> <br />24 <br />