Building Ontario Line in Toronto, ON

West End: (Satellite)

North End: (Satellite)

Toronto is doing a lot of tunneling. In addition to their Eglinton Crosstown West Extension, they are building a new subway from downtown to the Eglinton Crosstown LRT at Don Mills Road.

Metrolinx
"The Ontario Line will be a 15.6-kilometre subway line."

"Tunnel boring has proven to be an efficient, safe and reliable way to dig new tunnels for transit lines in built-up areas and it is being used to build Metrolinx projects like the Eglinton Crosstown LRT, the Eglinton Crosstown West Extension, the Scarborough Subway Extension, the Yonge North Subway Extension, and the Ontario Line. This method relies on tunnel boring machines – or TBMs, for short – which tunnel under existing structures and roadways. These machines can be as long as a football field and have a rotating cutter head at the front end that carefully digs through the earth." [metrolinx_tunneling]

 

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The Ontario Line goes near Lake Ontario, but not under. So is there another tunneling project at the lake that has these leaks?

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Significant water ingress during the TBM tunnelling under Lake Ontario in Toronto, Ontario, Canada. Chemical foam was injected behind the segments to stop water which had washed substantial amount of grout.

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Video credit: LinkedIn Alex Raposo

The evening after I did a Google search for this project, this showed up on my YouTube page. I'm reminded that YouTube is also owned by Google.

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