Scarborough Subway Extension Tunnelling Works

Underground infrastructure for Toronto’s expanding transit network

STRABAG, through its Canadian subsidiary, was awarded the tunnelling contract for the extension of the Scarborough Subway (Line 2) in Toronto. The approximately 500 million euros (CAD 757 million) project was procured under a design-build-finance model.

The contract was awarded by Infrastructure Ontario and Metrolinx through a public procurement process. Key evaluation criteria included the proposed design and construction methodology, project management approach and the collaborative capabilities of the project team.

The 7,8-kilometre extension runs entirely underground and connects the existing Kennedy Station terminus with the Sheppard Avenue/McCowan Road area. The scope includes the construction of launch and reception shafts, headwalls for future stations and rescue shafts, as well as tunnelling works using a tunnel boring machine with a diameter of 11,87 metres. 

Scope of Work

• Design-build-finance delivery 
• Tunnel construction using TBM technology 
• Construction of launch and reception shafts 
• Headwalls for future stations and for rescue shafts 
• Underground rail infrastructure works