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Ontario Line - Southern Civil, Stations and Tunnel project

Project Type:
DBF – Design Build Finance
Infrastructure Type:
Contract Value:
$6 Billion

About the Project

The Southern Civil, Stations and Tunnel project is one of many contracts to deliver the Ontario Line, a 15.6-kilometre stand-alone rapid transit line that will connect the Ontario Science Centre to Exhibition/Ontario Place.


  • Request for Qualifications
    Jun 02, 2020
  • Short-list Bidders Selected
    Dec 14, 2020
  • Request for Proposals
    Dec 14, 2020
  • Winning Bidder Selected
    Nov 08, 2022
  • Construction Begins
    Nov 08, 2022
  • Construction Ends

Latest News


The scope of work for the South contract includes:

  • A design-build-finance contract for the southern portion of the Ontario Line, from Exhibition/Ontario Place to the Don Yard portal (west of the Don River)
  • Civil: ground works required to build the tunnels and stations; utility and conduit works to prepare for the RSSOM mechanical and electrical systems; guideway structures and facilities to prepare for the track structure to be installed by the RSSOM contractor
  • Stations:         
    • one above-ground station to be integrated with the existing GO Transit Exhibition Station
    • two underground stations to be integrated with the existing TTC Osgoode and Queen subway stations
    • four new underground stations (King/Bathurst, Queen/Spadina, Moss Park, Corktown)
  • Tunnel: a six-kilometre tunnel and all associated tunnelling works from Exhibition to Don Yard portal (west of Don River)

Project Benefits

  • Faster, more frequent and reliable access to rapid transit with more than 227,500 people will live within a 10-minute walk of an Ontario Line station
  • Improve the quality of life for commuters by reducing daily travel time
  • Reduce crowding on the existing Line 1 (Yonge-University) subway
  • Up to 57,000 more jobs accessible by transit (in 45 minutes or less) for Toronto residents
  • Economic and community growth along the future transit line and thousands of job opportunities annually during construction
  • Reduction in traffic congestion, greenhouse gases and fuel consumption by providing an alternative transportation option

Demonstrating Value

  • 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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