Ashbridges Bay Wastewater Treatment Plant

The plant is located on the shore of Lake Ontario at the foot of Leslie Street at Ashbridge's Bay.

An odour control study[4] was completed in 2002 and, beginning in 2002, the area around the plant was also redesigned into a large landscaped park.

The overall budget for the projects is $3 Billion CAD, representing the largest stormwater management program in Toronto's history.

[7] The DR&CW project will capture wastewater from combined sewers across the city and divert it to Ashbridges Bay Treatment Plant for treatment and discharge into Lake Ontario, diverting and virtually eliminating all discharge into the Don river, Taylor-Massey creek and Toronto harbour.

[8] The first phase, commonly referred to as the Coxwell Bypass Tunnel, is a 10.5km long, 6.3m diameter tunnel that will run in the vicinity of the Don river valley and Lakeshore Boulevard East from near the north end of Coxwell Avenue to Ashbridges Bay Treatment Plant.

Planned future phases include the Taylor-Massey creek and Inner Harbour West tunnels, to be completed pending funding and regulatory approval.

[8] A joint initiative between the City of Toronto and the Toronto Region Conservation Authority (TRCA), the landform project involves the construction of new landforms south of the plant in Ashbridges Bay using the material removed from the DR&CW tunnelling projects.

Part of the reclaimed lands will also be the site of a new high-rate treatment facility, designed specifically to treat wastewater intercepted from combined sewers by the DR&CW tunnels.

The system will include sodium hypochlorite disinfection and dechlorination as a backup for treating excessive flows caused by extreme rainfall.

50 underwater risers connecting to the outfall pipe will be drilled from on-water barges, and will disperse the treated and disinfected effluent into Lake Ontario.