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Table 1 <br />Grand Valle Lake — Conve ance A <br />From Station To Station Len th Confi uration <br />0+0 250+00 25,000 O en <br />250+00 260+00 1,000 Si hon <br />260+00 490+00 30,000 O en <br />490+00 500+00 1,000 Si hon <br />500+00 2360+00 184,000 O en <br />2360+00 2430+00 7,000 Tunnel <br />2430+00 2440+00 1,000 Si hon <br />2440+00 2470+00 3,000 Tunnel <br />2470+00 2590+00 12,000 Flume <br />2590+00 2740+00 15,000 Tunnel <br />2740+00 2800+00 6,000 O en <br />2800+00 2880+00 8,000 Tunnel <br />2880+00 2940+00 6,000 Flume <br />2940+00 2950+00 1,000 Si hon <br />2950+00 2970+00 2,000 Flume <br />2970+00 3160+00 19,000 Tunnel <br />3160+00 4440+00 128,000 O en <br />4440+00 4470+00 3,000 Cut <br />B. Pumped-Flow Alignments <br />In addition to the gravity alignments discussed above, a pumped-flow conveyance system was <br />considered for the two alternative flow rates. This conveyance system would divert water from the <br />Gunnison River near Whitewater, approximately 15 miles upstream of the confluence with the Colorado <br />River. A diversion, similar to, but smaller than, the one required for the gravity-flow alignments would <br />be needed. The pumped conveyance alignment (Alignment C) involves approximately 26,500 feet (5 <br />mi) of buried pipe diverting water on the north side of the Gunnison River to the reservoir as shown on <br />Figure 4. <br />The maximum pumping head including friction losses is approximately 350 feet for both diversion <br />capacities since pipe diameters were adjusted to maintain similar maximum flow velocities. For the <br />larger reservoir capacity and a 300 cfs diversion capacity, a 15,000 horsepower pump station would be <br />AECOM <br />18 <br />2/22/2010 <br />