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preserve flexibility for future expansion of the recycled water system, the transmission <br /> pipelines are sized under each final alternative to serve all of the Priority 1,2, and 3 <br /> customers in each of the three geographical areas (as in Alternative B). <br /> <br /> ES.4 Recommended Project <br /> <br />Based on an evaluation of cost-effectiveness, water supply, and future flexibility <br />considerations, Project Alternative D is recommended to the City for use in proiect <br />planning and implementation, determining a financing strategy, and in developing an <br />initial rate and revenue plan. Refer to Figure ES-1 for a schematic plan of Alternative D. <br />The primary reason for recommending Alternative D is that it is the most cost-effective <br />project configuration that provides an adequate water supply (1,955 AF/yr) to: <br /> <br /> 1. Reduce existing demands on the San Francisco Hetch Hetchy regional water <br /> system to be within the City's contractual supply assurance. <br /> <br /> 2. Provide a source of future water supply for potential new developments within the <br /> City. <br /> <br />Alternative D also provides significant flexibility for the future, so the City can continue to <br />explore the benefits of additional water conservation measures, overall water supply <br />reliability and drought tolerance issues, water transfers and other water supply <br />management options. If the City requires additional recycled water supply in the future, <br />the pipelines provided under Alternative D are oversized to allow the system to expand <br />across Bayshore Highway 101 into Central Redwood City for a City-wide project (3,172 <br />AF/yr as in Alternative B). The system could also support expansion into adjacent <br />communities to meet future needs if the City were to negotiate agreements for <br />transmission of water from SBSA to other retail water suppliers. <br /> <br />Additional benefits and considerations associated with recommending Alternative D are <br />included in Section 5 of this report. <br /> <br />The total estimate of probable capital cost, including facilities construction, service <br />connections and site retrofits, engineering, construction management, administration <br />and a 20% project contingency is approximately $36,819,000. The portion of this cost <br />associated with providing oversized pipelines for future flexibility is approximately <br />$4,891,000. Alternative D capital costs are summarized in Table ES-1. <br /> <br />Water Recycling Feasibility Study for Redwood City <br /> <br /> <br />