By Amanda Pfeffer, CBC News Ottawa, June 10, 2016
Engineers say 300 metres of light rail tunnel are flooded after Wednesday morning's Rideau Street sinkhole and water main break.
Engineers for the Rideau Transit Group (RTG) went down into the tunnel Friday to assess the damage for the first time since workers were told to drop their tools and leave the site in the minutes after the street above the tunnel fell away, creating a sinkhole five metres deep.









