In 2016, Binnie was retained by the City of Surrey to provide design and construction services for a new sanitary pump station in South Surrey located at 168th St & 14th Ave. The new sanitary pump station was necessary to accommodate sewage flows from the latest developments that were happening in that area.
This project involved the installation of a new sanitary pump station with overflow tank, surge tanks, odour control system, bioxide system, and approximately 3km of force main – with valuation at $5.6 million for the pump station and $3.7 million for the force main.
Additionally, Binnie provided complete engineering preliminary, detailed design services, and construction services for the new $5.6 million large Fergus sanitary pump station and $3.7 million force main in the City of Surrey. Binnie also provided construction management services through final commissioning and acceptance. As the pump station is adjacent to a City park as well as overhead BC Hydro transmission towers, the design required considerable project management to coordinate land usage, zoning, and building and landscape architecture.
Due to the long length of the force main, a bioxide system needed to be added to the sewage to keep it from going rancid as it spends quite a bit of time inside the force main before reaching its discharge point.
The new station now contains four new 180hp submersible pumps pumping against 80-meter heads (approximately 114 psi). Due to the high heads, a transient analysis was completed. As part of an overall transient mitigation strategy, the analysis incorporated two 10 cubic meter surge tanks in the pump station. The pumps are controlled with VFDs for energy efficiency, as well as additional transient control. The new 600 mm-diameter HDPE Fergus force main extends 2,900 meters from the station connecting to a large-diameter gravity interceptor on 24th Avenue.
The pump station is also provided with a large overflow chamber, odour control system, HVAC, standby generator, and force main chemical dosing system. The biobed extracts odors from a large gravity interceptor and uses high-capacity blowers to force the odourous air through a biobed designed to strip the odour producing compounds.
