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I I I I I I ~ I I I I I I ^ ~!. "" ',," " ..,t.tW With full use of Ruedi storage, releases in a dry year such as 1977 would approach the minimum inflow bypass (i.e., virgin flow) or the minimum fish bypass, whichever is least, plus releases required for sales of water. This is the situation depicted in Table 5, which indicates flows in the Frying- pan and Roaring Fork Rivers with and without sales to Colony Shale Oil Project. Results in this table are based on the assumptions of: (1) full diversion to the Arkansas River and (2) minimum releases for fish. The flows presented in Columns 9 and 10 of Table 5 provide a good indication of the impact of the proposed water sale under future development conditions when full diversions to the Fryingpan-Arkansas project are being made. Comparison of Columns 9a and 9b in Table 5 indicates the effect of water sales to Colony Shale Oil Project would be to increase minimum flows to more closely approach the desired minimum fish flows. This relationship is also illustrated in Figure 2. The effect of the proposed sale of Ruedi Reservoir water on flows in the Colorado River would be slight. The major control on the river at the Oow Pumping Plant is the "Cameo Demand," which is a group of water rights that total about 2000 cfs in the summer and approximately 800 cfs in the winter and which can preempt junior rights above the Cameo gaging station. Under these conditions, if water were released from the Ruedi Reservoir to allow out of priority diversions by the Dow Pumping Plant, the increased flow on the Colorado River would be, at most, about 2 percent between Glenwood Springs (the confluence of the Roaring Fork) and the Dow Pumping Plant. Below the Dow Pumping Plant the proposed sale would have no net effect on flows when replacement releases are made from Ruedi Reservoir. When the Dow Pumping Plant is diverting in priority with no releases from Ruedi Reservoir, the diversion would reduce the 2000 cfs minimum summer flow at Cameo by less than one percent. Table 6 shows the effect of the proposed Colony Shale Oil Project water sales from Ruedi Reservoir on reservoir water surface elevations. Column 5 indicates the change in elevation that would have occurred if sales had been (14)