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I I I I I I I I I I I I I I I I I I I Essentially all water requests would be met except where streams are physically incapable of del ivering the amount of water at the time requested. At this level of water sales a shortage of from zero percent to 30 percent might have to be imposed in some months of some years. Alternative 3 - Full Sales/Exchange with lnstream Flow Constraints. This alternative considers the same level of water sales (22,800 acre- feet) as Al ternative 2; however, currently reconmended or appropriated instream flow values by the Colorado Water Conservation Board are assumed to represent an added constraint on the diversion or depl etion of streamflow. This added constraint could be particularly important for those water requestors anticipating use of Green Mountain water as a basi s for exchange from the small er, headwater streams in the Fraser River, Blue River, and Eagle River drainages. Under this alternative, many water requests would not be met in full during some months of some years. As with Alternative 2, a shortage of from zero to 30 percent might have to be imposed in some months of some years. Alternative 4 - Expanded Sales Representing Maximum Water Sales from Green Mountain Reservoir. This alternative assumes approximately a 25 percent increase in demand over Alternatives 2 and 3 to a level of 28,800 acre-feet annually. At this level of sales a shortage of from 20 percent to 50 percent might have to be imposed in some months of some years. Such a level of demand might be generated by expanded industrial (e.g., oil shale) requirements for Green Mountain Water. For Alternative 4, the incremental increase from the full sales level (22,800 acre-feet as shown in Table 2) to the expanded sales level would be assumed to represent a demand below Green Mountain Reservoir. One- half the incremental increase in demand would be applied above the - 16 -