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<br />canal discharges into Shadow Mountain Lake. A wasteway turnout, <br />located upstream. f'rom the .gate structure, leads f'ram the canal to <br />the Colorado River and provides for drainage of the canal. <br /> <br />Shadow Mountain and Grand Lakes, connected by an equalizing <br />channel, are operated as a single bod;y" of water to supply a uniform <br />rate of flow through the Alva B. Adams Tunnel. <br /> <br />Shadow Mountain Lake, formed by Shadow Mountain Dam, is <br />located on the North Fork of the Colorado River below its confluence <br />with the outlet channel f'ram Grand Lake. At operating level, Shadow <br />Mountain and Grand Lake s form one continuous body of water, with <br />Shadow Mountain Lake covering an area of 1,337 acres and the two <br />lakes at the CCllllInon operating level cpvering 1,852 acres. During <br />periods when normal inflow to the lakes is inadequate to maintain <br />a uniform rate of flow through the Adams Tunnel, the lake level is <br />maintained by pumping f'ram Granby Reservoir. Controls provide for <br />automatic regulation of the water surface of Grand Lake within a <br />I-foot fluctuation limit--between elevations 8366.0 and 8367.0. <br /> <br /> <br />Shadow Mountain Lake - Outlet Works Right Foreground. <br /> <br />Shadow Mountain Dam. (1934-1946) is an earth and rock- <br />fill type structure with a volume of 161,406 cubic yards, a maximum <br />height of 78 feet, and an over-all crest length of 3,100 feet in- <br />cluding the dike-like construction that exteruis west along the right <br /> <br />14 <br />