Charleston, SC The Concord Street Pumping Station provides stormwater service for the Calhoun-East and Market Street watersheds, encompassing approximately 240 acres in historic downtown Charleston, South Carolina. The station receives stormwater flow from four deep tunnels (Calhoun Street, Meeting Street, Concord Street, and Market Street tunnels) and pumps stormwater from the wet well to the Cooper River through a discharge outfall.
Ruby-Collins delivered comprehensive upgrades including replacement of four 325-hp stormwater pumps (170,000 GPM total capacity) and upsizing of two dewatering pumps from 90-hp to 250-hp (1,840 GPM total capacity). Additional improvements included evaluation of a debris management system at the base of the 150-foot deep wet well, upgrades to the existing motor control center (MCC) and building, structural rehabilitation of the wet well, surrounding structures and outfall line, complete electrical and control system upgrades, and installation of a new standby generator.
Minor exterior building modifications were completed through coordination with Charleston’s Historic Review Board. The station remained fully operational throughout construction, with specific activities scheduled around hurricane seasons. The restrictive site location adjacent to a residential development and new public cultural center required extensive coordination with the Owner, engineer, and multiple stakeholders to maintain community access and minimize impacts.
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