Launching for final leg of Spadina drive24 Sep 2013
Toronto Transit Commission News Release
Both machines are in the ground for the final leg of tunneling on the Toronto Spadina Line extension, with final breakthrough scheduled before year end, nearly two-and-a-half years after first launch on the Can$2.63 billion project.
The 8.6km link between the existing Downsview Station at the southern end of the alignment, and the newly-built station at Vaughan Metropolitan Centre at the northern end was split by the project owner, Toronto Transit Commission, into two tunneling contracts comprising ten tunnel drives using four Caterpillar TBMs.
On September 13 (2013) TBM Torkie began its third and final 1km drive from the Highway 407 launch shaft, having been dismantled, transported and reassembled following completion of an earlier drive to Pioneer Village Station in June for the OHL/FCC joint venture. Sister machine TBM Yorkie launched on its final leg on August 15.
Excavation of the project's southern tunnels was completed by the Aecon/McNally/Kiewit joint venture in March (2013) as part of a Can$279 million tunneling contract. The northern contract was valued at Can$404.5 million. The project also includes construction of four new cut-and-cover stations at Finch West, Vaughan, Steele's West and York University.
Southern tunnel with emergency exit, inverts and walkways
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