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<br />0022 <br /> <br />i' .' <br /> <br />EXHIBIT 3 <br />Description of Alternative Six1l <br /> <br />This alternative is developed from the Cities' proposal and would divert <br />water from the Cross Creek and Fall Creek drainages and transport it by <br />underground tunnel s to the exi sting Homestake Reservoi r (Figure 2-11). <br />From there it would enter the Cities' existing water delivery system to the <br />east slope. The proposed collection system and facil ities are described <br />below. <br /> <br />1. Divers i on structures on ma in, West, and East Cross Creeks, and <br />Fa 11 Creek. <br /> <br />2. Approximately eleven (11) miles of underground tunnels connecting <br />the four diversion structures to the existing Phase I pipeline at <br />the Fancy Creek portal. <br /> <br />3. A buried 66-inch gravity pipeline extending 3,000 feet from the <br />tunnel portal at Fancy Creek to a point near the north portal of <br />the Missouri Tunnel providing a capacity to convey the total <br />Cross Creek Tunnel flow to the Missouri Tunnel. The Cross Creek <br />flow wou1 d i niti a lly be conveyed from Fancy Creek portal to the <br />Missouri Tunnel by the existing Fancy-French gravity conduit; but <br />as additional streams are diverted, the conduit capacity would be <br />exceeded and the additional 66-inch parallel pipeline would be <br />required. <br /> <br />4. A power distribution line adjacent to the Homestake Creek valley. <br /> <br />All four diversion dams would be located within the Holy Cross Wilderness <br />resulting in a total of six (6) acres of direct wilderness disturbance. <br />This alternative would produce about 350,000 cubic yards of tunnel muck if <br />drill and shoot construction methods are used, and about 210,000 cubic <br />yards of muck if boring equipment is utilized. <br /> <br />The estimated average annual water yield for this alternative is 19,600 <br />acre-feet. This alternative would develop only a portion of the Cities' <br />undeveloped Eagle River basin water rights and would not develop those <br />rights decreed to the Eagle-Arkansas project. It is estimated that about <br />19,000 acre-feet of decreed water rights would remain undeveloped. <br /> <br />11 From Text of FEIS Section 2.2.6, page 2-32. <br /> <br />1 <br />