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Tunnel Boring Machines "Yorkie" and "Torkie Complete Third Section of Twin Tunnels

June 25, 2013

On Thursday, June 13, 2013 and Friday, June 14, 2013 tunnel boring machines (TBMs) “Yorkie” and “Torkie” broke through the headwall at the Steeles Avenue West extraction shaft, marking another important milestone for the Toronto-York Spadina Subway Extension project.  These drives took the machines under Jane Street and the CN Rail tracks, creating the twin tunnels connecting from the future Highway 407 Station through to Black Creek Pioneer Village Station (formerly known as Steeles West Station).

Map of Northern Tunnel Drives

The TBMs began tunnelling in March and April of this year from the southern launch shaft located at Highway 407 Station.  The extraction shaft, where the TBMs arrived, is located north of Steeles Avenue West east of Jane Street. Both TBMs will now be dismantled and moved to the Highway 407 northern launch shaft and will bore the next and final section of twin tunnels between Highway 407 and Vaughan Metropolitan Centre Stations.

TBM Yorkie breaks through

June 14, 2013 - TBM "Yorkie" Breaks through at Black Creek Pioneer Village Station Site

Yorkie and Torkie in the Extraction Shaft

June 14, 2013 - TBMs Yorkie and Torkie arrive at the extraction shaft located at Black Creek Pioneer Village Station Site

Each of the two tunnel drives was approximately 1,020 metres long and a total of 1,354 tunnel rings were placed to create the tunnels.  You can follow the progress of “Yorkie” and “Torkie” on our website under Tunnelling Progress and Construction Activity Maps


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