Agenda - Council - 12/12/2017 - Laserfiche WebLink

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determined based on meeting water quality standards for iron, manganese and hardness. The disadvantage to this system is the impact of the blending water on water quality. This may be mitigated by blending water under all water demand conditions. The advantage of this system is the water treatment facilities can be designed with a lower capacity, thus reducing capital investment. Evaluation of the impact of this process will be conducted during final design. Alternative 1: Surface Water Supply. With this alternative, the following key improvements are required. Phase 1.- Construct a 9.6 mgd surface water treatment facility. Facility will need to be on-line by 2019 to meet community water demands. Estimated cost: $32,000,000. Phase 2 - Construct 2.4 mgd surface water treatment facility expansion. Expanded capacity required by 2025 to meet community water demand. Facility includes additional membrane filters, chemical feed and clarification facilities. Estimated Cost: $4,250,000. Figure 4.1 shows the timing required to construct the surface water system improvements to meet projected water demand. Total capital investment for this alternative is estimated to be $36,500,000. Alternative 2: Ground Water Supply. With this alternative, additional ground water wells, and a ground water treatment facility would be required. Key improvements are as follows: Phase 1 - Construct 9.6 mgd ground water treatment facility. Facility to be on- line by 2019. Estimated Cost: $24,000,000. Phase 2 - Construct Well 9. Well to be on-line by 2019. Estimated Cost: $900,000. Phase 3 - Construct Well 10. Well to be on-line by 2022. Estimated Cost: $900,000. Phase 4 - Construct 2.4 mgd ground water treatment facility expansion. Facility to be on-line by 2026. Estimated Cost: $4,100,000. City of Ramsey, Minnesota — R13.104504 Page 25 Comprehensive Water System Study Prepared by Bolton & Menk, Inc.