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I I I I I I I I I ,I I I I I I I I I I Description of Alternatives The six final project alternatives in this study resulted from a process of identifying, analyzing and screening a large number of potential improvements to the three major water supply systems in the study area, A total of approximately seventeen reservoir sites, fifteen new or enlarged canals, seven new or improved stream diversions and several ideas for groundwater development were evaluated and reviewed with local water users during the course of the study, The six final alternatives are described in the following paragraphs, Two of the alternatives (1 and 4) incorporate and expand the existing Gurley and Lone Cone systems to provide additional irrigation water supplies to the Norwood-Redvale area, Two of the alternatives (3 and 5) incorporate and expand the existing Lilylands system to provide additional irrigation water supplies to the East Lilylands and Dry Creek Basin areas, The remaining two alternatives (2 and 6) incorporate and expand all three of the existing major irrigation systems and would provide additional irrigation water supplies to all three of the San Miguel Project service areas, The alternatives were developed in such a way that Alternative 6 (which serves the entire study area) could be constructed in stages starting with anyone of Alternatives 1, 3, 4 or 5, Alternative 1 would provide a new source of water for the Gurley and Lone Cone systems by means of enlarging the existing J & M Hughes Ditch; storing the water in a new reservoir at the Marie Scott site on Saltado Creek (capacity of 12,000 acre-feet (al)); conveying the water to the Gurley Ditch in a new Beaver Park Ditch and siphon across Beaver Canyon; enlarging the Lone Cone Intake Ditch; and interconnecting the Gurley Ditch with the Lone Cone system, Alternative 2 would provide new sources of water for all three of the existing irrigation systems by means of the same features described above for Alternative 1 (with a larger Marie Scott Reservoir - capacity of 25,000 aI), plus extending the Lilylands Intake Canal and interconnecting the Lilylands system to the Lone Cone system, Alternative 3 would develop additional water for the Lilylands system by means of enlarging the existing Lilylands Reservoir to a capacity of 1,400 af and extending the Lilylands Intake Canal. Alternative 4 would develop additional water for the Gurley and Lone Cone systems by enlarging the existing Lone Cone Intake Ditch, expanding the existing Lone Cone Reservoir to a capacity of 5,800 af, and interconnecting the Gurley Ditch with the Lone Cone system, v