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<br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />Kinnikinick Afterbay and Dam <br /> <br />This feature would function as an afterbay to regu1ate the <br />fluctuating power releases passing through I~lwilde Powerplant. <br />The concrete ogee-type overflow dam. would have a arest length of <br />300 feet and a height above stream bed of 55 feet. The aapacity of <br />the reservoir would be about 1,000 aare-feet. <br /> <br /> <br />Rustic Diversion Dam <br /> <br />Releases from Kinnikinick Afterbay with a mini= of fluctu- <br />ation would flow downstream approximately eight miles to the Rustic <br />Diversion Dam. This structure would serve to divert water from. the <br />stream channel into Elkhorn Conduit. Rustic Diversion Dam would <br />have an ogee crest at about elevation 6,930, 15 feet above the <br />present stream bed; a river outlet through a sluice gate, a down- <br />stream river gage and headworks with measuring device for the <br />Elkhorn Conduit. An earth wing dike is required on the right <br />abutment. <br /> <br />Elkhorn Conduit <br /> <br />This structure would convey water from Rustic Diversion Dam <br />to Cache la Poudre Forebay. It would consist of two free-flow <br />tunnel sections each 4-1/2 miles long, separated by a short siphon <br />across Elkhorn Creek; a 9,OOO-foot 1.ong cut and cover section; and <br />a 4,70o-foot long high-head siphon aoross Hewlett Guloh. The conduit <br />would have a maximum capacity of 300 cfs with an average operation of <br />about 250 cfs. More detailed studies may indicate that a diversion <br />dam to divert flows from Elkhorn Creek would be feasible. <br /> <br />Cache la Poudre Forebay and Dam <br /> <br />The site of the proposed forebay is about 15 airline miles <br />northwest of Fort Collins, Colorado. It is about 2 miles north <br />and over 1,000 feet above "Columbine," a community situated in the <br />Poudre River Canyon. The dam structure would be earth and rock- <br />fill, having a crest length of approximately 750 feet and height <br />above stream bed of 150 feet. A dike 70 feet in height with a <br />crest length of 450 feet situated northwest of the main dam would <br />aJ.so be required. The arest elevation of both the dam and dike <br />would be 6,810 feet. Spillway requirements are small and will be <br />afforded from the inlet canaJ.. <br /> <br />The forebay would have an active capacity of 4,600 acre-feet. <br />Dead storage space would be about Boo acre-feet. The normal water <br />surface area is 95 acres and minimum water surface area is 30 acres. <br /> <br />6 <br />