The first tunnel boring machine on Toronto’s Ontario Line has reached the future King West Station at Bathurst Street. The federal government marked the breakthrough on 6 November. The machine, named Libby, had travelled approximately 1.3 km from its launch shaft east of Exhibition Station and installed about 780 lining rings.
CanadaThe government says crews will test and maintain Libby at King West before it continues towards the future Chinatown Station. A second machine, Corkie, is expected to arrive in December to excavate the parallel tunnel.
Why it matters
The breakthrough connects the first bored section to a station excavation and gives crews an opportunity to service the machine. The next drive and the parallel tunnel have their own milestones, so one breakthrough marks progress on a specific section of the project.
Housing, Infrastructure and Communities Canada, 6 November
Featured photograph. Construction at the future King West Station, formerly called King-Bathurst, in July 2025. Photo: Dillan Payne (CC BY-SA 4.0).
