Civdis
Active Member
Not sure I agree, the Ontario line is being tunneled through pretty competent bedrock (Georgian Bay Formation Shale). I would assume you could do the same for Alto. Might be a little deep, but workable.It’s a lot easier to tunnel through Central Montreal – especially Mount Royal – than it would be to tunnel under the USRC, which is a former lakebed.
I don’t really see ALTO using a long tunnel to get to Union Station.




