Credit: The Toronto Star

Some 9,000 precast tunnel liner rings and 523,000 cubic yards of concrete have been used to build Toronto's Yonge-University-Spadina subway extension, which runs a bit more than 5 miles. "There’s a lot of concrete down here. There’s more concrete [than] you could ever sort of believe," said Sam Spares, construction site manager. Work is expected to be finished this year, and then testing of systems and trains will begin.

Full Story:
The Toronto Star

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