Horseshoe Slough Drainage Pump Station

The maximum capacity of the original pump station was estimated at 3 m³/s. Associated Engineering was engaged to provide design and construction services to replace the pump station as part of the City of Richmond’s drainage system upgrade plan and to increase its pumping capacity and reliability.

The following key design features were implemented:

• Station to be a post-disaster structure with ground improvements using stone columns.
• 3 submersible KSB axial-flow pumps providing 4.2 m³/s combined capacity, operating on VFDs.
• Combined concrete floodbox and pump discharge structure.
• Dyke adjacent to station was raised from 3.5 m to 4.7 m, with considerations for future build-out elevation of up to 5.5 m.
• Backflow valve with fish screen was installed to allow water backflow for irrigation purposes.
• Stationary generator on site, sized to operate two pumping units.
• Architectural design of the structures.

AE’s scope of work included:

• Concept, preliminary and detailed design.
• Environmental assessment and preparation of applicable permits.
• Tender, construction and post-construction services.

The project was completed in November 2020.