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Update: TBM "Moley" Breaks Through on the East Side of W.R. Allen Road - Marking the Completion of the Southern Portion of Tunnels in Toronto

March 13, 2013

In late September, 2012 the Tunnel Boring Machine “Moley” began its second tunnelling drive from the launch shaft at the Sheppard West Station site and headed southbound toward the Downsview Subway Station. “Moley” has now completed the milestone of breaking through at the extraction shaft located at W.R. Allen Road and Sheppard Avenue West on March 5, 2013. “Moley” tunnelled 1.2 kms in its final drive and placed 799 tunnel liners in the tunnel.

Progress Map of the Southern Tunnels.


This marks the completion of the southern tunnels for the TYSSE Project! Removal of “Moley” from the extraction shaft began the week of March 11, 2013 and is anticipated to take approximately six weeks to complete. The  extraction shaft will then be converted to a drop shaft to facilitate track, systems and equipment to be  lowered to track level.

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