The sinkholes near Montreal-Trudeau airport were caused by the tunnel boring machine.
The construction work on Greater Montreal’s future lightrail network (REM) is...ly appeared in the wetlands of the Technoparc Montreal, north of the Montréal...com/news/canada/2021/09/16/the-sinkholes-near-montreal-trudeau-airport-were-caused-b...
cover tunnel photo by: Matt Brown from London, England / CC BY
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