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Crews arriving at the scene of a partial tunnel collapse in downtown Ottawa on Nov. 10, 2016[/caption]
Three workers were rescued after a piece of concrete fell inside a light rail tunnel in downtown Ottawa Thursday.
Two of the workers escaped injury. One received a minor hand injury, according to paramedics.
The collapse happened under Waller Street near the University of Ottawa around 4:30 p.m.
The city tweeted there was not a tunnel collapse, rather a piece of “shotcrete” fell from the roof of the tunnel. Shotcrete is a layer of temporary spray-on concrete.
Mayor Jim Watson told media about 13 pounds of material fell.
Work has been halted until the Ontario Ministry of Labour can investigate.
Roads have reopened.