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Water Storage Siting Study City of Lino Lakes WSB Project No. 2988-44 Page 11 Table 7 – 1.5 MG Composite Water Tower Estimated 50-Year Life Cycle Cost Item Quantity Unit Unit Cost Total Cost 1.5 MG Composite Water Tower 1 EA $3,325,000 $3,325,000 Associated Site Work 1 LS $300,000 $300,000 Land Purchase for Water Tower Site 1.5 ACRE $100,000 $150,000 Sandblast and recoat interior and exterior of steel bowl every 15 years 3 EA $704,000 $2,112,000 Subtotal $5,887,000 Engineering, Bidding, and Construction Services (5%) $294,350 Total Estimated 50-Year Cost $6,181,350 4.4 Comparison of Life Costs The opinion of probable capital and operation and maintenance costs are summarized in Table 8. The estimated costs are present day costs. A composite water tower has the lowest estimated capital cost and the lowest estimated total cost although the 50-year operation and maintenance costs are higher than the costs for a concrete ground storage reservoir and booster station. The elevated tower costs assume that suitable soils are available on-site. The estimated electricity costs for the booster station pumps for the ground storage reservoir option are not included since there would be an equal reduction in electricity costs for the well pumps (the well pumps would be pumping to a lower elevation at the ground storage reservoir). Based on this evaluation and the fact that the City is not considering a water treatment plant at this time, we recommend the City construct a 1.5 MG composite water tower. Table 8: Opinion of Probable Capital and O&M Costs for All Options Option Estimated Capital Cost Including Engineering, Bidding, and Construction Services Estimated 50 Year Operation and Maintenance Cost Total Capital and O&M Cost Concrete Ground Storage Reservoir and Booster Station $6,059,248 $902,000 $6,961,248 Fluted Column Style Water Tower $4,301,250 $3,600,000 $7,901,250 Composite Style Water Tower $4,069,350 $2,112,000 $6,181,350