Peterborough Wastewater Treatment Plant Phase 4 Expansion

This project is the fourth phase in upgrades to the Peterborough Wastewater Treatment Plant, and consists of a new inflow and infiltration (I&I) system (four tanks and a pumping station), screen building, WWC and maintenance buildings, a renovation and expansion to the existing administration building and process upgrades to the Park Street pumping station – a number of small projects amalgamated into a $20 million contract.

The inflow and infiltration (I&I) tanks are predominantly used as storage tanks during periods of heavy rain where the flow into the plant exceeds its capacity. The existing I&I tanks, built in the 1920’s, had the capacity of storing 8,000m³ of wastewater. One of the main components of this project is a new I&I system – four storage tanks with a capacity of 25,000m³ and a pumping station with four submersible pumps capable of filling all four tanks in five hours. These tanks give the City more capacity than the existing I&I tanks. The next phase of the project entailed the demolition of the old tanks.

A subsequent phase of the project will see the new maintenance building built over the footprint of the old I&I tanks, and the completion of the WWC building. Both of these buildings were value-engineering concepts suggested by Maple Reinders that have changed the design of these buildings from reinforced concrete/structural steel to pre-engineered buildings. This has resulted in cost savings to the City of Peterborough for a total of approximately $190,000. Other components of the project include a new screen building, with state-of-the-art bar screens, grit classifiers, and conveyors, as well as a renovation and expansion to the existing administration building, which includes a new laboratory and office/meeting space.