Work underway across all contracts that make up the Ontario Line

Construction begins on two new bridges in the northern part of the route.

Oct. 2 – Construction has begun on two new bridges in the northern segment of the Ontario Line, marking the start of work on the project’s final awarded contract. These bridges will carry Ontario Line trains across the Don Valley and through the Thorncliffe and Flemingdon Park neighbourhoods.

The future Don Valley Crossing will connect the underground portion of the line that runs beneath Pape Avenue to an elevated guideway that will run through Thorncliffe Park. At about 504 metres long and 38 metres tall at its highest point, it will be the first major elevated crossing of the Don Valley since the Leaside Bridge was constructed in 1927. 

The future West Don Crossing will connect the elevated sections of the route between Thorncliffe Park and Flemingdon Park as the line traverses the valley again. It will be about 411 metres long in total and 36 metres tall at its highest point. 

Crews will use a balanced cantilever method to build both bridges, avoiding the need for large sections of scaffolding underneath. With five long spans situated between support columns, the bridges will not only be more aesthetically pleasing, but will result in a smaller footprint during construction and beyond. 

Signs of progress all around

This new milestone builds on the ongoing progress of the Ontario Line, with partners on board for all contracts and work underway along the entire route. This work includes:

• Getting ready for major construction on the tunnel launch shaft at Exhibition Station. From here, tunnel boring machines will dig the first subway tunnels under Toronto's downtown core in over 60 years, laying the groundwork for a vital new transit line in the city.
• Conducting major construction at all downtown station sites, including excavations at King-Bathurst, Queen-Spadina, and Moss Park. Excavation work will also begin soon at Osgoode and Corktown.
• Making major upgrades to the above-ground rail corridor where Ontario Line trains will run from the lower Don River and into Leslieville, including bridge construction and noise barrier installations.
• Building the foundations needed to support the excavation of a new Ontario Line interchange at the existing Line 2 Pape subway station.
• Preparing for major construction for the new Thorncliffe Park Station and the operations, maintenance and storage facility, where trains will be cleaned and maintained.

When complete, the Ontario line will bring 15 new subway stations to the city, running from Exhibition Place through downtown, making it faster and easier to travel within Toronto and beyond.

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