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I I I I I I I I I I I I I I I I I I I Alternatives Considered in Detail Three alternatives, as well as the No Action Alternative, were ana- lyzed in the Green Mountain EIS and are discussed below. This Biological Assessment will only address the impacts of Alternative 4, the maximum water sales scenario and, therefore, a worst case situation. Impacts to Threatened or Endangered species would be simil ar for other water sales alternatives. Alternative 1. No-Action Alternative. This alternative reflects the present reservoir operational practices under Senate Document 80. This can be considered the basel ine alternative in that use patterns based on historic flows would continue. Water would continue to be available for. interim contracts, but there would be no long-term contracts for water sales. Environmental impacts of such sales would be addressed on a year-by-year, case-by-case basis. Alternative 2 - Full Sales/Exchange with Only Hydrologic Con- straints. Under this alternative the full sales or exchange to meet all of the currently identified requests for water (approximately 22,800 acre-feet) are made. A review of the requests for water from Green Mountain Reservoir (Tabl e 2) reveal s that many requestors are located above Green Mountain Reservoir in the Bl ue River drainage or on the Fraser or Eagl e river systems. For these requestors, diversions and/or depletions would be made to the flow of small, upper watershed streams, and corresponding rel eases from Green Mountain Reservoir would repl ace the depl etion to the Colorado River system below the reservoir. Water sales to these requestors imply an exchange of water above Green Mountain Reservoir. Under thi s alternati ve, the physical (hydrologic) constraints of the system to del iver requested water sales is the only constraint. - 12 -