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<br />, <br /> <br />Colorado-Big Thompson Project <br /> <br /> <br />o <br />C) <br />>- <br /> <br />i" <br /> <br />.;:.. <br />c.., <br /> <br />......... <br />~O:"'- ___ .. <br />Granh)' Dam and n.....,.n-oir <br /> <br />and Pole Hill Tunn('] and Canal to a penstock through <br />which the water drops 815 feet to Pole Hill Powerplant. <br />It is th('n routed through Pole Hill Powerplant Afterbs)'. <br />Rault'snah> Tunnel. Pinewood Lake. and Bald Moun- <br />tain Pressure Tunnel. and dropped 1,055 let't through <br />two penstocks to Flatiron Powerplalll. Thill powt'rpJant <br />digcharges into Flatiron Reservoir. which regulates the <br />waler for rel(,lIS(' to the foothills storagE" and distribution <br />system. The afterbll)' storage in Flatiron Reservoir and <br />tht' foreha)' storage in Pinewood ukI;' enable Flatiron <br />Powerplant to me('l daily poW('f loads. <br /> <br />Southward. the Flatiron reversible pump lifts water from <br />Flatiron Re&"n-"oir. a maximum of 297 fl?'et, and delivers <br />it through Carter Lake PreS!!UTf' Conduit and Tunnel to <br />Cartf'r Lake. When the now i8 reversed. the unil acts as <br />a turbine-generator and produce;! f'lectric energy. <br /> <br />The 51. \'rain Supply Canal dl"livl"rs water from Carter <br />Lake 10 the Little Thompson River. SI. Vrain Creek. and <br />Boulder Creek Supply Canal. The latter delivers waler to <br />Boulder Creek and Boulder Re~n."oir. The South Platte <br />Supply Canal. di\"t"rting from Boulder Crt'('k. delivers <br />water to the Soulh Plattt' Rin"r. <br /> <br />Northward. the Charll";! Hansen FeMer Canal transports <br />water from Flatiron Reservoir to thf' Big Thompson <br />River and Horsetooth Reservoir. The canal cro'-"~s the <br />Big Thomp~n Ri\"er in a siphon above the rh'er and <br />highway. U"at('r from th(' Big Thompson River can hf' <br />di\"ertro into th(' canal by Tunnel ~'o. 1. HorSf'tooth <br />Supply Conduit. <br /> <br />Project watt"r de]jwries and Big Thompson Rh"er water <br />to hf' r('turnt"d 10 thl" rivf'r arl" dropped through a chute <br />from Ihl" feMer canal ahead of the siphon cros..~ing, or are <br /> <br />pasllt.'d through the Big Thomp!lOn Powt"rplant to convert <br />the available head to electric energ}', <br /> <br />HOnletooth Re~rvoir is Wf'!lt of Fort Collins btot\\"('en two <br />hogback ridges, whert' Horst>looth Dam c1013('!'- Ihe gap at <br />one end. Soldier. Dhon. and Spring Canyon Dams and <br />Sa tanka Dike close the rl"maining gap!!. <br /> <br />An outlet at Soldier Canyon Dam !lupplie!! waler to Fort <br />Collins, nual water districts, Colorado Slate University. <br />and the Dixon Feffier Canal for the irri~alro area cut off <br />from its water supply by the reservoir. <br /> <br />The principal outlet from Horst' tooth Rf'S('rvoir is <br />through 1I0rst'looth Dam into the Charles Hansen Canal. <br />ThiJ'l c.anal delivt"rs water to a chute discharging into th(' <br />Cacht" la Poudre Hi,"er and to a siphon crossing Ih(' river <br />10 supply th(' Poudre Yalley and Resen'oir Company <br />Canal. A turnout supplies the Grt'('ley municipal water <br />works. Wat('r i.!l delh-erro to th(' ri\"er to replace. by ex- <br />change. that waler di\"ertro upstr('am of the North <br />Poudre Supply Canal. which com-ep! it to the North <br />Poudrt" Ditch. <br /> <br />Grt"('n 'fountain Dam. Resenoir, and Powerplant <br /> <br />Green .:\lountain Dam is on the western !'-Iope 13 miles <br />south('ast of Krt"mmling on the Blue Riv('r. a tributar)" of <br />the Colorado. This dam provide!'- replacement storagl" for <br />water diwrtt'd b~" the project to the eastern slope. The <br />dam is an earthlill structurt". 309 ft'('t high. with a CTt>!\t <br />length of 1.150 feet and a ,'olume of ".360.211 cubic <br />yard!\. The re!len'oir has a total capacity of 153.6..19 acrt"- <br />ft"et. The powerplant has two units with a total installt'd <br />generating capacily 01 ::!1.600 kilowatts, <br />