scarberiankhatru
Senior Member
They could always *not* clad it to save on ventilation costs...
My understanding is this may be one of the deepest excavations ever in Toronto. There are 8 levels of underground parking planned. The TTC also played a major role due to the proximety of the subway tunnel. The TTC set a criteria that underground vibrations and movement must ensure the tunel doesn't move more then 10 millimeters. The developer spent six to eight months working with various consultants and soil engineers in their efforts to create some distance from the tunnel and satisfying the engineering criteria. The TTC only recently signed off.
Any idea how long excavation will take?