WSP11583 - Laserfiche WebLink

Home Browse Search

!"..'"J~6 .....'.J ..J........ . PART II--:FEATUR:E3 AND ESTIMA.TE3 Water Rep;uJ.a.t1on Presented in this report is a plan to supplement the existing irr1gation and municipal water supplies in the Cache la Poudre valley. The p.la.n provides for new facUities constituting a uni-t which would make 1'ul.l.es-t practical use of the po-tential water supply. ]lew facilities consist of water s-tore.ge, regula-ting and conveyance works, and power generating plants. New features, to be located in the mountains, would provide storage space for the following purposes: (1) to regulate presently unappropriated surplus nows which now leave the basin unused; (2) to consolida-te the storage of several plains reservoirs to effect optimum utilization of these established rights; (3) to replace the s-torage of municipal water in Greeley's mountain reservoirs, and to regulate further the annual Fort Coll1ns and Greeley allotments of Colorado-Big Th~son project water. In order to prOvide these s-torage functions -the transfer of same water rights from the old to the new facilities wi:luJ.d be required. . Idylwilde Reservoir would regulate nows of the main stem for a year-round opera-tion of the Idylwilde and Cache la Poudre Powerplants. A large portion of the stored water would come from the heavy spring runoff resulting from sn= melt. The _ter in storage would be released as needed for the generation of power. Releases from Idylwilde Reservoir wouJ.d be made through the - IcJyhrilae-Powerp1a.nt, -a .peaking instaUatJon, into Kinnikinick A:f'terbay for reregulation. Water would be released from Kinnickinick A:fterbay to the stream at nearly a uniform rate and would now in the stream for about eight miles to the Rustic Diversion Dam. With the exception of the fishery release and an occasional spill, all the Kinnikinick release would be diverted a-t -the Rustic Diversion Dam through the Elkhorn Conduit to Cache la Poudre Forebay. This forebay would prOvide the capacity needed for the peaking releases through the Cache 18 Poudre Conduit and Cache 18 Poudre Powerplant permitting releases far greater than the Elkhorn Conduit capacity. The Cache la Poudre Powerplant wouJ.d discharge into Grey Mountain Reservoir. In addition to its conservation function, Grey Mountain Reservoir would serve as an afterbay for the Cache la Poudre Powerplant and prov1-de terminal storage for winter power releases. . 4