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~r:~...,~n t:.-.i....~_.,_d . Grey Mounta.1n nun and Reservoir The active capacity of Grey Mounta.1n Reservoir would be 200,000 acre-feet and its inactive capacity 20,000 acre-feet. The Ir.~Y-\m"ln water surface elevation would be 5,626 feet, and the top of the dead storage would be elevation 5,424- feet. The surface area of' the dead storage pool would be 380 acres. The surface area when the reservoir is :full would be 1,800 acres. The dam would be an earth and rock-fill structure with the upstream face riprapped. Its height above stream bed would be about 375' feet, and the crest length would be 1,550 f'eet. A concrete-lined chute spillway with a capacity of 90,000 cf's, a I1Jl,ted inJ.et, and a stilling basin would. originate in a sad.dJ.e just left of the left abutment. The outlet works would consist of' a tunnel, gate cbamber, gates, steel pipe and valve house and would have a capacity of' 4,000 cfs. The tunnel, 1/"h1ch is through the left abutment, 1/"ould also serve as a diversion tunnel. . Irrigation releases to the North Poudre Supply Ca.na.l 1/"ould be made by modifying Tunnel NO.2, an existing structure leading eastward to the plains from the reservoir area. The municipal waterworks of' Fort Collins at an estimated cost 01' $1,755,000 would be relocated along the soutll side of the river belov the dam. Existing telephone and REA pover lines would be relocated nee.r the State Highway No. 14 relocation, south of the reservoir. Transmission Lines and Substations The Cache la Poudre Poverplant is to be the center of' power operations. A power line leading to the Cache la Poudre switchyard. from Idylwilde switchyard. would, therefore, be required. This 115 IN Idylwilde line would be 22 miles in length. Five 115 I<:V l:I.nes each 13 miles in length would be required from the Cache la poudre Poverplant Swi tchyard to a substation near Fort Collins, Colorado. From this substation two 115 KV 11nes, each having a length of' 31 miles, would be required to tie into the existing substation at the edge of' Greeley, Colorado. Same additions would be required at the Fort Co1l1ns Substation. Communication Equipment Idylwilde Powerplant would be operated by remote control from the Cache la Poudre Poverplant, Carrier current equipment at both poverplants and a telemetering circuit would be used to start, syDclu'Oniz.e and cont.l'o]. the generators at Idylwilde Powerplant. . 8