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River Islands Development at Lathrop January 2021 <br /> FINAL River Islands Non-Potable Water Technical Report Rev 2 #6520 <br /> 3.5 Non-Potable Water Pumping Capacity Requirements— Existing Main Pump Station <br /> The Existing Main Pump Station (Main PS) (also known as the Lake 3 Irrigation Pump Station) was <br /> completed in 2018 and is currently the only source of pressure for River Islands NPW Distribution System. <br /> The Main PS is equipped with an irrigation skid approximately 7-feet wide by 16-feet long with 5 pumps <br /> providing a firm pumping capacity of 2,400 GPM as shown below. The Main PS will be primarily responsible <br /> for servicing the irrigation needs of Stages 1A, 1 B, 2A, and portions of 2B in Phase I. Future expansions <br /> of the NPW distribution system exceeding the firm pumping capacity of the Main PS will require an <br /> additional NPW pumping station, as the Main PS does not have provisions for additional pumping capacity <br /> to be installed. <br /> Table 3-3: Main Pump Station Irrigation Skid —Firm Pumping Capacity <br /> Pumping Motor <br /> Capacity Rated <br /> (GPM) @ Horse- <br /> Pump Number 215 TDH power Motor Drive Status <br /> Irrigation Pump#1 1,000 75 Variable Frequency Lead <br /> Drive <br /> Irrigation Pump#2 1,000 75 Across the Line Lag <br /> Motor Starter <br /> Irrigation Pump#3 1,000 75 Across the Line Standby <br /> Motor Starter <br /> Jockey Pump 350 30 Variable Frewquency Lead <br /> Drive <br /> Pressure Sustaining Pump 50 5 Across the Line Lead <br /> Motor Starter <br /> Main Pump Station -Total Firm Pumping Capacity 2,400 <br /> Notes <br /> 1. Firm Pumping Capacity is defined as the pumping capacity of all the pumps minus the capacity of the largest <br /> pump(per Appendix H in the City Standards). <br /> 13 <br />