As part of the City of Portland's combined sewer overflow (CSO) program; Swan Island Pump Station (SIPS) serves as the terminus of two large CSO conveyance and storage tunnels deep beneath the city, designed to collect and store combined sewage. The 150-foot deep, 130-foot diameter
below grade pump station was designed in two phases to convey 220 million gallons per day (mgd) to the City's main treatment facility. The first Phase, put in Service in December 2006, consists of two 800-hp dry weather pumps, and two 2,000-hp wet weather pumps, with total pumping capacity
of 100-mgd. The second Phase, currently under construction, includes the addition of three 2250-hp wet weather pumps, with an additional pumping capacity of 120 mgd. This paper provides a case history of the SIPS with specific emphasis placed on (1) hydraulic design challenges, (2) pump station
operations, and (3) lessons learned from three years of operation associated with the first phase of construction.
Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.