Quote:
Originally Posted by accord1999
Much of the beltline tunnel also has to be bored due to very poor geology, plus the need to go under the existing Red Line tunnel and the reserved space for the 8th Avenue subway.
Low-resolution geology overview from a 2014 report:
Some parts of it were going to be about 30 m below surface.
https://www.calgary.ca/green-line/co...-stations.html
The deep underground station(s) would also be extremely expensive; just deferring the Centre Street Station saved about $400M. |
Any idea how much of the 8th avenue tunnel is actually built right now?
Would completing the 8th Avenue tunnel, sinking the red line allow the Green Line to occupy 7th Avenue and move up Centre Street? I know getting the Green Line to 7th might be a challenge, but that seems easier than what is presented now?