Infrastructure Ontario (IO) and Metrolinx have awarded a fixed-price contract of CAD757.1 million (USD626.25 million) to Strabag to design, build and finance the tunnel for the Scarborough Subway Extension project.

The Strabag team includes:

• Construction Team: Strabag Inc.
• Design Team: Arup Canada Inc., Brian Isherwood & Associates Ltd.
• Financial Advisor: Strabag Inc

The project underwent an open, fair and competitive procurement process overseen by a third-party fairness advisor. Strabag submitted the proposal, which delivers the best value for Ontario taxpayers. It is being delivered through IO’s Public-Private Partnership (P3) model.

The  Scarborough Subway Extension Advance Tunnel scope of work includes:

• Tunneling works for the 7.8-kilometre subway extension, from Kennedy Station to McCowan Road/Sheppard Avenue.
• Design and construction of launch and extraction shafts, tunnel, as well as headwalls for emergency exit buildings and stations.
• Supplying the tunnel boring machine and installing segmental precast concrete tunnel liners.
• Activities necessary to build the tunnel (e.g. utility relocations, supports for shaft and headwalls, temporary power supply, lighting, ventilation, and drainage).

Onsite mobilization and pre-construction work began this spring, with launch shaft construction beginning in June 2021. Major tunnel boring is expected to begin next year.