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<br /> <br />--..."',.~-~ ~~ <br />~ .. ",",' ~.~ ',. <br />:.,. ".:"'1':";' <br />~, 'f"'.P"" . ,.0'''~.'.'~'~, <br />: ~ -". .q '-. ''.'','~~-;''E~r.' :): <br />~.. ";"':\,.'.. ,r..t;."~..;~"'..i! <br />~ '. IL'" ' , <br />, :t'~'{i";' "'ltr'" <br />(I,.....:.~.;:, <br /> <br />~ <br /> <br />Lake Estes. <br /> <br />my.mpus Dam (1947-1949) is an earth and rockfill type <br />structure with a concrete-gravity overflow section at the right <br />abutment. The concrete section contains two l8-inch river outlets, <br />an overflow spillway, and headworks for the Olympus Siphon. The <br />d.am has a ma;x:1mum height of 60 feet, an over-all crest length of <br />1,880 feet, and a volume of 281,000 cubic yard.s of earth and rock- <br />fill and 15,000 cubic yard.s .of concrete. The spillway has a capac- <br />ity of 22,500 cfs and is controlled. by five 20-foot by 17-foot <br />rad.ial gates.' The river outlets are controlled. by two 2.5-foot by <br />2.5-foot slide. gates and the headworks is regulated. by two 6.25- <br />foot by 8.0-foot fixe d.-wheel gates. The river outlets and the head- <br />works are shielded. by fish screens. <br /> <br />Olympus Siphon, 10.75 feet in d.iameter and 0.8 mile long, leads <br />from the d.iversion headworks to the 1.8-mile Olympus Tunnel and <br />5.4-mile Pole Hill Tunnel which will carry the water to the Pole <br />Hill Power Plant. <br /> <br />Pole Hill Power Plant, a single-unit plant with an installed. <br />capacity of 33,000 kilowatts and a static head. of 840 feet, will <br />operate on water from Lake Estes d.elivered. via the Olympus Siphon <br />and Tunnel and the Pole Hill Tunnel and Canal. <br /> <br />Rattlesnake Dam and Reservoir will provid.e 1,400 acre-feet of <br />operating capacity for peaking purposes at the Flatiron Power Plant. <br /> <br />20 <br />