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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />C. Growth <br /> <br />The intent of this upgrade project is to correct recognized deficiencies in the town's water system <br />and to meet the existing needs of the Town of Minturn. Storage volume will be increased, but <br />this increase is needed to address fire protection concerns, rather than growth issues. The new <br />pump station is needed to provide system energy to supply water into the new tank, but will <br />be designed with the capability to be expanded in response to increased demand for water as <br />a result of future growth. This project will provide for a much improved water system, capable <br />of expansion as future development occurs in the areas previously discussed. <br /> <br />V. ALTERNATIVES CONSIDERED <br /> <br />Alternatives were examined for the proposed water storage tank. The first alternative described <br />below considers storage tank volume. The second alternative examines the material of <br />construction for the tank, i.e. concrete versus steel. The third and fourth alternatives evaluate <br />two potential sites for the proposed storage tank. <br /> <br />V.I Storage Tank Volume <br /> <br />A. Description <br /> <br />This alternative examines the storage volume required to satisfy design criteria. The relative <br />ability of different sized tanks to satisfy equalization, emergency, and fire protection needs were <br />determined. <br /> <br />- B. Design Criteria <br /> <br />Design criteria were established for the three uses of stored water: equalization, emergency and <br />fire protection. They are defined to be: <br /> <br />Equalization Volume: Equalization volume is that quantity of stored water needed to augment <br />water supplied directly from the treatment works in order to satisfy system demands during <br />peak demand periods. Equalization volume was determined from computerized hydraulic <br />modeling as described in Section VI.A, Project Design. Extended period simulation modeling <br />indicates that the equalization volume is dependent upon the tank water level at which the water <br />supply pumps at the treatment plant are activated. When no pumps are operating, water is <br />supplied to the system from the storage tank until the tank level drops to the depth at which <br />one, or both, of the pumps are activated, At that point the water level in the tank either <br />stabilizes or begins to rise. In the hydraulic model, the first pump was set to energize at a water <br /> <br />Town of Minturn Water System Upgrade Project, March, 1995 <br /> <br />18 <br />