Creve Coeur Pump Station

Project Type: Water & Wastewater,

Size: 60 MGD 40 feet below grade

Owner: Metropolitan St. Louis Sewer District

Location: St. Louis, MO

KCI Role: General Contractor

Value: $19,930,000

Delivery Method: Bid Build

Completion Date: 2010

Designer: CDM

An aging pump station needed replacement due to general deterioration and because it was undersized for future growth in the area. The new pump station, situated on the same site as the existing station, was a few hundred feet from Creve Coeur Lake and at 40 feet deep is approximately 30 feet below the water table. KCI developed a sheetpile shoring system with internal walers and tie-backs, and coupled that with a dewatering system utilizing 14 deep wells that ran around the clock for ten weeks. After sheetpile installation, the entire site was vibrocompated prior to excavation, and the pump station then built with 5′-0″ thick footing slabs and walls. Additionally, project scope included over 1,000 linear feet of influent force main and discharge piping, ranging in size from 30″ ductile iron pipe to 72″ reinforced concrete pipe. The pump station houses five 15 MGD pumps, a biofilter system, screening and channel grinders, and an emergency generator.