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I I I I I I I I I I I I I I I I I I I 1.4.2 - Conclusions 1. Based on the level of this study, there are no major technical or environmental problems that would preclude the construction of a reservoir on either the Turkey Creek or Snowball Creek drainages. 2. Sizing of the reservoir is highly dependent upon the level of future development of the town of Pagosa Springs and the surrounding area. Also the willingness of Fairfield/Pagosa, Crossroads Development and Wolf Creek Valley to enter into water sales contracts would be an important factor in determining the optimum reservoir size. The reservoir size is somewhere between 3,095 acre-feet and 4,528 acre-feet if a full years supply were provided. The feasibility study should examine the use of the reservoir to augment the flow from the existing water supply as an option. This would allow construction of a less expensive, smaller reservoir that may be more in line with the town's financial ability. 3. Construction of a reservoir at either site should improve water quality at the treatment plant. 4. Yield calculations indicate that storable flows at either site would be available approximately 9 years out of 10, to fill a reservoir of the size contemplated. Turkey Creek would provide a more reliable source of water than Snowball Creek because the tributary yield and size of the watershed below the Snowball Ditch diversion point is larger. 5. Based on the range of reservoir sizes required for this project, the Snowball Creek sites appear less costly than the Turkey Creek sites. The cost of the spillway at Turkey Creek made the Snowball sites more attractive. These costs were partially offset by the high land acquisition and pipeline costs on Snowball Creek. 1-7