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<br />.' <br /> <br />001173 <br /> <br />36 <br /> <br />of a suite of up to 9 individua"l model runs. A scenario is defined by a given configuration of water <br />resource facility development in the basin. Three demand levels and three administrative or <br />development strategies have been ckfined. Scenarios hav~ been arranged into matrices (see, e.g., <br />Figures 4.4, 4-5, and 4-6) to facilitate comparison or' the strategies of meeting future .demands through <br />subordination of the instream flow for endangered fish and of meeting future demands by making <br />releases from storage accrued under rights c~ns!dered senior to the instream flow. <br /> <br />Scenario 1 . No action alternative <br />This suite consists of 6 model runs and addresses the "no action" alternative. There would be <br />no in stream flow call and no new water project development. Existing projects would be operated <br />according to current policies and would meet only those demands that are covered by existing wa~er <br />service contracts. The six model runs in this soite would be defined by the use of current, year 2015, <br />and year 2040 water demands and by the assumption that demands do/do not have access to reservoir <br />storage. <br /> <br />Scenario 2 - No new facilities but with instream flow right <br />This suite consists of 6 model funs and incorporales thl' instrcam now Uuniper) right. There is <br />no development of any new storage projects. Existing projects would be operated to meet shortages to <br />the degree possible within current operating policies. Again, the model runs in this suite are <br />differentiated by the demands considered and by the assumptions that supplies are available only by <br />direct ,flow through subordination of the instream flow right, or hy reservoir r<.:leases. <br /> <br />Scenario 3 . Enlargement of Elkhead Reservoir and instream flow <br />This suite consists of 8 model runs. Included is the speciflcation of a :18,:)00 af enlargement of <br />Elkhead Reservoir and the :;tdministration of the minimum instream flow right which is senior to future <br />demands. <br /> <br />Scenario 4 - Enlarged Stagecoach Reservoir. <br /> <br />Scenario 5 - Williams Fork Reservoir. <br /> <br />Scenario 6. Other development alternatives. <br /> <br />Additional assumptio'ns and operating rules of Scenarios 1 through 6 will be described more <br />fully in Task 7. Task" of this study includes the evaluation of several' new reservoirs and various <br />operating strategies. <br /> <br />, <br />