The Confederation Line [Under Construction] in National Capital Region Posted May 4 · Report reply 1 hour ago, OCCheetos said: 3 hours ago, MCIBUS said: Heck this s nothing. Try having water still leaking into the tunnel. They still have not solve the issue Water is still coming thru band they solution they tried to use to stop it isn't working. Water leaking into tunnels is a common occurrence (the Dow's Lake tunnel leaks like crazy). Derailments are a little more serious and not quite as common. Indeed. Groundwater and efflorescence are still a thing. Permanent pumping is not a 'problem', but a solution to natural infiltration. Here's the ceiling of a Montréal metro station before its rebuild, 50 years after opening.