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Name: Todd A. Blomstrom Date: October 8, 2020 Page: 4 Table 4 - Option 2 Cost Estimates Item Cost Mobilization $20,000 Construction and Utility Allowance $15,000 Lift Station Structures $150,000 Submersible Pumps/Control panel $87,000 Piping & Valves $25,000 Controls & Electrical $15,000 Panel Pad $4,000 Demolition/Removal $15,000 Bypass Pumping $3,000 Site Work (Grading, Drive, Seeding, etc.) $15,000 Construction Subtotal $349,000 Contingencies (20%) $70,000 Construction Total $419,000 Option 3 - Replace with Submersible Grinder Station The third option for station rehabilitation consists of replacing the current submersible lift station with a small prefabricated lift station containing submersible grinder pumps. Details of the option include the following: - Purchase and installation of a prefabricated grinder lift station - Direct drilling of a new ~975-foot PVC force main (two or three-inch) to the existing outfall - Demolition of existing wet well/valve vault station A grinder station is a lift station structure that is shipped essentially prefabricated, including pumps, valving, and internal piping, and is then installed on-site. Typical grinder stations often include an optional corresponding control panel, but a buyer may choose to have station controls fabricated and provided separately. The grinder station basin is usually constructed out of fiberglass or another composite mat erial. Pumps range in size and are submersible grinder pumps designed to operate in low flow/high head conditions. As such, they are best suited to pump through a force main that typically ranges in diameter between one and three inches. At Lift Station 10 a 2-inch PVC force main would most likely be recommended. Advantages of installing a grinder station include lower initial and operating costs for the station itself, and ultimately a more compact and unobtrusive site. This type of design would