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Reservoir. One-half the incremental increase in demand would be applied above the Dotsero gage and one-half would be applied above the Cameo gage. The incremental increase would be considered 100 percent consumptive use and would be distributed over a 12-month period. This would permit evaluation of the impacts associated with maximum stress on the reservoir and the downstream river system. Under this alternative increased upstream exchange will not be evaluated, as such an evaluation would require identification of a specific quantity and point of diversion. Assessment of impacts associated with increased upstream exchange will require environmental compliance on a case-by-case basis. Where shortages exist under Alternatives 2,3, and 4, the procedures for distributing these shortages will be discussed with reference to several criteria including: (1) geographical limits, (2) limits by category of demand, and (3) limits by certainty (time) of demand. While limiting criteria 2 and 3 apply to both upstream and downstream (above and below Green Mountain Reservoir) users, criteria 1 applies primarily to downstream users. For example, preference might be given to users above Dotsero over those below Dotsero. Users below Dotsero would, presumably, have access to Ruedi Reservoir water. Alternatives Eliminated from Detailed Study. Several alternatives that were not analyzed in detail were considered at some point in the planning and scoping process. This section provides a brief description of those alternatives and cites the reasons they were eliminated from detailed study. The initial formulation of alternatives took place prior to the completion of the Bureau's system-wide model for Green Mountain operations. At this stage several alternatives were planned to evaluate the impacts of various water sales levels below the requested full sales level of 22,800 acre-feet. These alternatives would evaluate the impacts of limited sales or exchange of Green Mountain water at levels between 10,000 and 21,000 acre-feet. However, initial results of the reservoir and river system operational analysis revealed that a sales level of 22,800 acre-feet, representing the full amount of Green Mountain water requested could be met with only modest shortages in some months of some years. Consequently, there was no need to evaluate the limited sales condition. The point was made at several sessions during the scoping process for this document that Green Mountain Reservoir represents an extremely important source of water, particularly for water users in Summit and Grand counties. While Green Mountain represents an important source of water, it is not the only potential source available to these water users. The Middle Park Water Conservancy District has water available for irrigation and municipal purposes in Granby Reservoir. Both the Colorado River Water Conservation District and Middle Park Water Conservancy District are in the process of permitting a water storage project to be constructed on ~ither Rock Creek or Muddy Creek. Water from this facility may be available by the early 1990.s. Additionally, water users can and have purchased available water rights. An example of this is the purchase by the Town of Breckenridge of agricultural water rights in the Blue River drainage. Green Mountain Reservoir is attractive vi