[timun]

Originally Posted by cam_wmh

Question, why is the Green Line subway line going under 11th ave, and not 10th ave -- where it won't affect Manhattan & Lewis Lofts?

(propaganda: https://pub-calgary.escribemeetings....ocumentId=6833 )

1. Your link is from five years ago, when the proposed alignment was on 12th Ave. The current alignment, agreed to last year, is to go down 11th and not touch the Manhattan and Lewis Lofts at all.



2. Going down 10th presents several problems, the biggest being the crossing at 4th Street SE. To go under 4th St is not an option because it wouldn't be deep enough. To go over would require a new bridge and then to drop below grade west of 4th Street, which means 10th Ave becomes a trench between 4th St and Macleod. There likely isn't enough room to get the train entirely below grade by the time it crosses Macleod, so you're potentially looking at an at-grade crossing at Macleod.

Finally, accommodating for the radius of the curve onto 2nd St SW would put the tunnel underneath the PennWest Plaza and Bankers Court buildings, both of which have much deeper foundations that the lower-rise buildings on 11th.