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Waterloo Wastewater Treatment Plant Expansion

Waterloo, ON

Contract Value:

$48.9 million

Prime Consultant:


Project Owner:

Regional Municipality of Waterloo

Contract Format:


Completion Date:

February 2014

Contract Duration:

37 months

As part of the Regional Municipality of Waterloo’s master plan to update existing equipment in the region, the Waterloo Wastewater Treatment Plant upgrade was contracted to Graham to increase the overall plant capacity to meet growth demands and to improve the quality of effluent being discharged into the Grand River.

Graham self-performed all concrete works which involved 10,000m3 of concrete and 25,000m2 of formwork. The upgrade consisted of general site work modifications including new yard piping and pavement, demolition of the existing administration building and primary clarifiers, and the expansion and tie-in of raw wastewater trunk sewer. Installation of primary influent piping, headworks equipment, biosolids treatment equipment, and new electrical, instrumentation and control systems were also part of the upgrade project. New construction included the headworks building and biofilter, a new biosolids building and ferric chloride feed system, and new raw wastewater plant bypass.