Infrastructure Ontario and Metrolinx have selected a consortium to tackle the next phase of construction work at Toronto’s Union Station.

The organizations announced that ONTrack Alliance, a team made up of constructors Kiewit and Alberici in joint venture, and designers WSP Canada Inc., will lead the Union Station enhancement project.

The project will see the construction of a new platform and the development of a new concourse area below the platform to accommodate increased capacity as part of the planned expansion of GO Transit rail service.

Specific work includes construction of new platforms with canopies and vertical access elements such as stairs and elevators; construction of two new tracks and associated signal works; construction of a new concourse area below the new platforms that will connect the York, Bay and Via Concourse, Union Square and the Scotiabank Galleria and both York and Bay Streets; and storm water management system and other building systems

The enhancement project is separate from the ongoing construction work at the downtown rail hub that has been underway for nearly 10 years.

Details on the project value and schedule have yet to be released. The latest P3 Market Update document issued by IO in September estimates the project budget to be between $200 million and $499 million. IO and Metrolinx expect to reach financial close on the project next fall.

ONTrack Alliance was selected from among four consortia that were shortlisted in February.