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Tunnel Boring Machine “Yorkie” Breaks Through at Highway 7

October 8, 2013

On Monday, October 7, 2013, tunnel boring machine (TBM) “Yorkie” broke through the headwall at the Highway 7 extraction shaft, marking another important milestone for the Toronto-York Spadina Subway Extension project. This drive took the machine under Jane Street, Highway 407, Interchange Way and finally to the headwall in the south of Highway 7.  The headwall is located in the extraction shaft located south of Highway 7 and west of Jane Street.

“Yorkie” began tunnelling on August 15, 2013, from the northern launch shaft at the Highway 407 station site.  This final tunnel drive for “Yorkie” created the northern tunnel from the future Highway 407 Station through to Vaughan Metropolitan Centre Station.

“Yorkie” tunnelled 935 metres in this drive and placed 623 tunnel liners in the tunnel.

Removal of “Yorkie” from the extraction shaft will begin next week and is anticipated to take approximately six weeks to complete.

“Torkie” is also anticipated to complete this tunnel drive from Highway 407 Station before the end of the year.

You may follow the progress of “Yorkie” and “Torkie” on our website under “Tunnelling Progress” and “Construction Activity Maps”.

 Tunnel Progress Map


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Review the new changes to bus routes in the area to connect to the new subway extension.

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