Ontario Line

The Ontario Line will bring nearly 16 kilometres of new subway service to Toronto to make it faster and easier for people to get where they need to be each day. The line will stretch across the city, from the Ontario Science Centre in the northeast to Ontario Place/Exhibition Station in the southwest. The Ontario Line is proposed to include 15 potential stations, including six interchange stations, and 17 new connections to GO train lines and existing subway and streetcar lines. The Project will be constructed in a dedicated right-of-way with a combination of elevated, tunneled, and at-grade segments at various locations.

Project activities will take place on mostly built-up land and may consist of activities such as site preparation, excavating/tunnelling and grading, construction of structures and bridges, and utility relocations. The project is anticipated to cross the vegetated Don River Valley at two locations. Work taking place near water includes construction of the two Don Valley Crossings, as well as the Lower Don River crossing which will involve the construction of two new bridges to accommodate the future Ontario Line tracks.



Latest update

September 12, 2021- The public comment period on the project is closed. Infrastructure Canada is considering comments received to help inform its determination on whether the carrying out of the project is likely to cause significant adverse environmental effects.


Key documents

Key documents
Document Number Document Title File Date
1 Public Comment Period on Intent to Make a Determination - August 13, 2021


Infrastructure Canada
Aboriginal Consultation and Environmental Services Aboriginal Consultation and Environmental Services
1100 - 180 Kent St
Ottawa, Ontario
Email: aboriginalconsultenv-consultautochtonesenv@infc.gc.ca

Infrastructure Canada
Meng Koh, Senior Environmental Review and Approvals Officer
180 Kent Street
Ottawa, Ontario K1P 0B6
Telephone: 343-551-0418
Email: meng.koh@infc.gc.ca

  • Location

    • Toronto (Ontario)
    • Toronto (Ontario)
  • Nature of Activity

    • Other, not otherwise specified
    • Bridges
  • Assessment Status

    In progress
  • Start Date

  • Proponent

  • Authorities

    • Department of National Defence
    • Infrastructure Canada
  • Assessment Type

    Project on federal lands
  • Reference Number


This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.


Nearby assessments

...within 200 kilometres
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