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I I I I I I I I I I I I I I I I I I I CHAPTER IV - ALTERNATIVE WATER DEVELOPMENT PLANS Conceptual plans were developed which utilized one or several reservoirs in combination to meet demands identified for the Yellow Jacket Project. These 16 initial plans were evaluated and eight were described in an interim report. The eight interim alternatives were further analyzed and three were selected for final evaluation. Initial Conceptual Plans An inventory of 16 reservoir sites was made concurrently with the evaluations of water rights and water demands. All sites, shown on Figure IV-l, were previously considered by others; some were USBR sites, some are on filings by private entities. Two days were spent in the basin on a field reconnaissance to inspect the sites and to note any obvious problems. All dam sites would accommodate earthfill structures ranging in 50 to 350 feet. Dams and reservoirs were laid out on existing maps. Capacities ranged from 10,000 acre-feet for small tributaries to 350,000 acre-feet for a site on the White River. height from topographic sites on The conceptual plans were based upon approximations of water available from existing water rights, location and quantity of water demands, and the reservoir sites available. Most of the identified reservoir sites were used in at least one such plan. Since some reservoirs were too small to serve all the demands, some plans used several sites. It was assumed that the maximum active capacity of any single or multiple reservoir system would be 55,000 acre-feet. This corresponds to the active capacity assigned to the YJWCD senior water rights. This active capacity would yield 87,500 acre-feet per year when used in conjunction with the direct diversion rights. Intake systems were required for those reservoirs located on tributaries of the North Fork or mainstem White River. Those systems included a diversion dam or pump station located on either the North Fork or White River and a IV-l