Determination of the capacity of the pumping station (and storage reservoir) shall be based on thorough analysis of the proposed system and the function of the pumping station in the total system operation.

Present and future needs of the water requirements, including flow for fire protection, shall be arrived at by a hydraulic analysis study. The analysis study should include full development demands.

Pumping station shall then be sized for anticipated demands for 20 years or full development, with initial installation of only enough pumping capacity for five to 10 years, with provision for installing additional pumps, as directed by future demands. The initial and the final installations shall include one spare unit of the largest size. (28-ME-DG-02 § 2)