Large Capacity Pump Station Rehabilitation in Detroit
Rehabilitation effort upgraded the more than 1 billion gallon per day capacity pumping station, improving reliability of the system without interruptions to service.
Project Outcomes and Benefits
- Provide novel CFD and physical model calibrated “elbow meter” (differential pressure tap around fitting) to meter flow/pump.
- The existing Pump Motors (1250, 1000 and 800 HP) were reconditioned off site and reinstalled.
- CFD and physical model informed partial gate throttling and wet well baffles to optimize conveyance and distribution of grit.
- Fully renovated facility that takes advantage of the inherent advantages of the legacy 1930s era equipment informed by modern advances.
- The new design aligned O&M needs with manpower and staff capabilities and provided the ability to field test pumps.
The Great Lakes Water Authority’s (GLWA) Pump Station No. 1 is a critical facility that provides continuous sewage service during dry and wet weather conditions to the city of Detroit, as well as 76 other communities.
This pump station is one of two influent pump stations for the Water Resource Recovery Facility (WRRF), which is the largest single-site wastewater treatment facility in the United States. Pump Station No. 1, first constructed in the 1940s, consists of eight constant speed vertical centrifugal pumps, ranging in size from 126 to 181 mgd. Grit and large debris routinely wear down the impellers which impairs the hydraulic performance of the pump capacity.
The multidisciplinary project team provided a comprehensive evaluation of the pump station. The full-service, multi-year project started with a condition evaluation followed by detailed design, bidding services, and construction assistance.