TORONTO - Infrastructure Ontario (IO) and Metrolinx have issued a Request for Proposals (RFP) to three shortlisted teams to design, build, and finance the GO Transit station improvements on the Stouffville Corridor.

The teams were selected based on criteria identified in the Request for Qualifications (RFQ) process that began in July 2016. Selection criteria included design and construction capability, experience, and financial capacity to deliver a project of this size and complexity.

The shortlisted teams are:

EllisDon Transit Infrastructure

  • Developer: EllisDon Capital Inc.
  • Constructor: EllisDon Civil Inc.
  • Design: WSP/MMM
  • Architecture: Architecture 49
  • Financial Advisor: EllisDon Capital Inc.

Kenaidan Obayashi Transit Partners

  • Developer and Constructor: Kenaidan Contracting Ltd. and Obayashi Canada Ltd.
  • Design: IBI Group and R.V. Anderson Associates Ltd.
  • Financial Advisor: Rocklynn Capital Inc.

Kiewit-Bird Joint Venture

  • Developer and Constructor: Peter Kiewit Infrastructure Co. and Bird Design-Build Construction
  • Design: Stantec and Perkins & Will
  • Financial Advisor: TD Securities, Kiewit Canada Development Corp. and Bird Capital Limited Partnership

The RFP outlines the scope of work required for three stations on the Stouffville Corridor:

  • Milliken Station: new east side platform and upgrade of existing west side platform with a full enclosure, passenger access tunnels connecting the platforms with elevators, new Steeles Avenue East pedestrian connection and customer amenities, and a grade separation at Steeles Avenue East.
  • Agincourt Station: new second track, new side platforms with a full enclosure, passenger access tunnels with elevators, customer waiting areas, building relocation and customer amenities provisions.
  • Unionville Station: new second track and third turning track, new side platforms with a canopy, passenger access tunnels with elevators, parking expansion and customer amenities.

Teams will now begin preparing proposals that will detail how they will design, build and finance the project. Once submissions are received, IO and Metrolinx will evaluate the proposals, select a preferred bidder and then negotiate a final contract. A fairness monitor will oversee the entire process and the successful bidder is expected to be announced in spring 2017.

A copy of the RFP is available at

This work on the Stouffville corridor is part of a larger, system-wide plan to improve overall GO Transit service, including the delivery of GO Regional Express Rail (RER) by 2024-25. To support transit improvements, Metrolinx will be undertaking major infrastructure upgrades, including additional track, GO station modifications, improved rail crossings, required systems for electrification, and new locomotives and train control systems to enable more frequent service.

Ontario is making the largest investment in public infrastructure in the province's history - about $160 billion over 12 years, which is supporting 110,000 jobs every year across the province with projects such as hospitals, schools, roads, bridges and transit. Since 2015, the province has announced support for more than 475 projects that will keep people and goods moving, connect communities and improve quality of life. To learn more about infrastructure projects in your community, go to

Quick Facts:

  • GO Regional Express Rail represents a historic investment in GO Transit that will provide faster, more frequent and convenient transit service across the Greater Toronto and Hamilton Area, including introducing electrification of core segments of the GO rail network by 2024- 25. GO RER will help manage congestion, connect people to jobs and decrease greenhouse gas emissions by reducing car trips and improving travel times.
  • Infrastructure Ontario, collaborating with Metrolinx, is leading the procurement of the GO Cooksville Station project, which will be delivered using IO's Alternative Financing and Procurement model.


“Making station improvements along the Stouffville Corridor will make it easier for people to choose transit first, building on our plans to strengthen the GO rail network with faster, more frequent GO train service.
Steven Del Duca, Minister of Transportation

“Investing in transit infrastructure is one of the ways we are helping to build Ontario up. Our government recognizes the importance of keeping people and goods moving, and I am pleased that we are moving forward with plans for GO transit expansion in Stouffville.”
Bob Chiarelli, Minister of Infrastructure

“This announcement marks a significant step forward in our plan to provide residents living in Scarborough and Markham with improved GO transit service that will help them get to where they need to go faster and more efficiently.”
Bruce McCuaig, President and CEO, Metrolinx

“With qualified proponent teams now in place, we look forward to reviewing their proposals in the coming months for the Stouffville project.”
Bert Clark, President and CEO, Infrastructure Ontario

Learn More

Infrastructure Ontario


Lisa DiMenna
Infrastructure Ontario


Anne Marie Aikins

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