Future OL Queen Station - hero image

Ontario Line

A new 15.6-km subway line in Toronto that will run from Exhibition Place, through downtown, all the way to Line 5 Eglinton at Don Mills Road.

Operations, maintenance and storage facility

The Ontario Line's operations, maintenance and storage facility (OMSF), located adjacent to the future Thorncliffe Park Station, will serve as the operational nerve centre of the new subway line and support the safe and reliable operation of trains every day.

The 175,000-square-metre facility will be home to the Ontario Line's fleet of 31 fully automated trains, where they will be cleaned, inspected, maintained and stored. The site will include a main operations building, traction power substation, train wash and gatehouse.

Images

Map showing location of the Ontario Line's Thorncliffe Park Station and nearby maintenance facility

Map showing the OMSF location. View a more detailed project footprint in the Environmental Impact Assessment Report here.

Renderings

Conceptual rendering of the Ontario Line's maintenance and storage facility entrance

Conceptual rendering of the future OMSF entrance.

Renderings of the Ontario Line's future operations, maintenance and storage facility

Aerial view of the OMSF, facing south from Wicksteed Avenue.

Key facts

  • 175,000-square-metre facility supporting Ontario Line operations

  • 31 fully automated trains maintained on site

  • 923 metres of test track for train testing

*Forecast for the year 2041

Construction timeline

  • Site preparation

    Spring 2025

  • Maintenance pit excavation

    Spring 2026

  • Retaining wall construction

    Spring 2026

  • Foundation work

    Current

  • Steel structural work

    Next

Community updates

Get in touch

We're committed to keeping you informed and engaged every step of the way as we build the Ontario Line.

Our team is here to answer your questions, address issues, and provide the information you need. Reach out to us any time at OntarioLine@metrolinx.com or via our 24/7 phone line: 416-202-5100.

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Land Acknowledgement

Metrolinx acknowledges that we connect communities by building and operating transit within the traditional lands of the Anishinaabe, the Haudenosaunee and the Wendat peoples, for whom these lands continue to have great importance. Treaties between First Nations and governments cover these lands, and the promises contained in these Treaties remain relevant to this day. Metrolinx and its employees are committed to understanding the history of these lands and the continued impacts of colonization and take responsibility for actions to advance reconciliation. Metrolinx will continue to seek the knowledge, expertise and experience of Indigenous partners and commits to doing business in a manner that is built on a foundation of trust, respect, and collaboration.