On-Site Magazine

Three teams in the running to build south end of new Toronto subway line

By David Kennedy   

Infrastructure P3s

Construction on an underground station along the Eglinton Crosstown, one of the major transit projects already underway beneath the city

The quickly evolving procurement process for the new Ontario Line, which will run beneath downtown Toronto before swinging north through the city’s east end, has reached the next phase.

Infrastructure Ontario (IO) and Metrolinx shortlisted three consortia Dec. 17 for a package that includes civil, station and tunnel work for the southern portion of the 15.6-kilometre subway line. A range of big-name builders and design firms, both domestic and international, are in the running to take on the project (scroll to the bottom for a complete breakdown of the construction teams).

“By issuing these first Ontario Line RFPs, Premier Ford’s vision for a world-class regional transit system continues to make steady progress,” Caroline Mulroney, the province’s minister of Transportation, said in a release. “The COVID-19 pandemic has had a devastating impact on our economy, and major transit projects like this will contribute significantly to our recovery by stimulating future growth and job creation.”

A map of the full line. Click to enlarge. PHOTO: Metrolinx

The province has divided the project into three main P3 contracts: one for the southern segment, one for the rolling stock and operations, and one for the northern portion of the line. Along with issuing a request for proposals for the southern civil work, IO also issued the RFP for the rolling stock this week. The RFP for the civil, station and tunnel construction on the northern section is not expected until 2022.


Final costs for the project have not been determined, but a preliminary business case released by provincial transit agency Metrolinx Dec. 17 estimates the Ontario Line’s cost at roughly $10 billion. It is one part of a wider province-led transit expansion plan worth $28.5 billion.

The contract for the southern segment of the line encompasses most of the major work required west of the Don Valley. Of the new subway’s 15 total stations, seven are included in the south segment. The design-build-finance contract will include roughly six-kilometres of tunnelling, the construction of the stations and guideways, and the necessary utility, mechanical and electrical systems.

The south portion of the line includes one above ground station, four new underground stops and two underground TTC interchange stations. PHOTO: Infrastructure Ontario

The three shortlisted consortia — Community Transit Link, ON-Linx and Ontario Transit Group — will prepare bids for the major infrastructure job in the coming months. IO and Metrolinx plan to select a winning team in 2022.

The two crown agencies said early works on the line could start next summer, though major construction will not get underway until 2023, according to the preliminary business case. Once in full swing, work on the subway is expected to create approximately 4,700 jobs.

Despite committing to deliver the transit project by 2027 when first introducing it last year, the business case now lists the start of operations on the new line as 2030.


The three construction teams shortlisted for the project:

Community Transit Link

Applicant leads: Aecon Infrastructure Management Inc., Dragados Canada Inc., STRABAG Inc.
Design team: Arup Canada Inc., Hatch Ltd.
Construction team: Aecon Infrastructure Management Inc., Dragados Canada Inc., STRABAG Inc.
Financial advisor: ACS Infrastructure Canada Inc., Aecon Concessions, National Bank Financial Inc.


Applicant leads: Webuild S.p.A., Astaldi Canada Enterprises Inc., Amico Infrastructures Inc., Saipem S.p.A.
Design team: IBI Group Professional Services Canada Inc., Arcadis Canada Inc.
Construction team: Webuild S.p.A., Astaldi Canada Design & Construction Inc., Amico Infrastructures Inc., Saipem S.p.A.

Ontario Transit Group

Applicant leads: Ferrovial Construction Canada Inc., VINCI Construction Grands Projets
Design team: AECOM Canada Ltd., COWI North America Ltd., GHD Limited, SENER Group
Construction team: Ferrovial Construction Canada Inc., Janin Atlas Inc.
Financial advisor: HSBC


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