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IEC completed the design of the 640-1 10mg and 640-2 10mg Reservoirs for Otay Water District. The project included a detailed alternative analysis to consider alternative reservoir designs, including circular pre-stressed concrete tanks, rectangular conventionally reinforced concrete tanks, and steel tanks. The concrete tank options included buried or partially buried alternatives. The nature of the project and its visibility from surrounding communities required a comprehensive community outreach approach. Photo simulations and other presentation materials were prepared to help inform the community of the project. The final design included twin 10mg tanks, above and below ground valve vaults, PRV stations, 42-inch inlet and outlet piping, over 10,000 linear feet of pipelines, access roads, and other civil site work. Challenges included steep topography and remedying an old fill site to accommodate the twin tanks. |
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Project Accomplishments • Minimized aesthetic impacts of the reservoir, situating them in an ideal location and designing partially buried reservoirs • Executed community involvement plan to gain public acceptance • Prepared an Initial Study/Mitigated Negative Declaration • Tailored the design to meet the District's SCADA system requirements • Designed a cost-effective facility while incorporating operators preferences
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