Scarborough Subway Extension – Advance Tunnel Project
- Project Type:
- Design Build Finance (DBF)
- Infrastructure Type:
- Contract Value:
- $757.1 million
About the Project
The Scarborough Subway Extension (SSE) Advance Tunnel Project is the first phase of work for the 7.8 kilometre extension of TTC's Line 2 (Bloor-Danforth), from Kennedy Station to McCowan Road/Sheppard Avenue.
Starting with the tunnelling phase of work allows a significant portion of the subway extension to move forward on an accelerated timeline.
A separate contract to deliver the rest of the work includes building the stations, fitting-out the tunnel and installing and commissioning the systems to put the subway in service.
Request for QualificationsMar 10, 2020
Short-list Bidders SelectedAug 05, 2020
Request for ProposalsAug 20, 2020
Winning Bidder SelectedMay 25, 2021
Construction BeginsJun 01, 2021
The scope of work includes:
- tunnelling works for the 7.8-kilometre subway extension, from Kennedy Station to McCowan road/Sheppard Avenue
- design and construction of launch and extraction shafts, tunnels, as well as headwalls for emergency exit buildings and stations
- supplying tunnel boring machines 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)
- Improves access to transit for area residents
- Reduces daily travel times for commuters
- Economic and community growth along the future transit line with job creation opportunities
- Reduction in traffic congestion, greenhouse gases and fuel consumption by providing a new transportation option
- The project is being delivered using a Design-Build-Finance (DBF) model. Key benefits of a DBF model include significant risk transfer to the private sector over the life of the project agreement, greater cost and schedule certainty and greater potential for design and construction efficiencies and innovation.
- Based on precedent project experience, a DBF procurement model typically has delivered a value for money savings in the range of 10% to 15% compared to undertaking the same projects using traditional delivery models.
Learn more about IO’s delivery models and the associated features.
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