Presumably because of cost of remediation and that is why (as discussed above) most of the parking is above grade. The site is polluted/contaminated so they got permission to cap it and if you look at the @evansdyk photos above you can see the black 'roofing felt' they are laying on top of the thin (?) concrete layer that have poured. I assume that they will be pouring a 'normal' concrete 'basement floor' on top of that in due course.So, the reason they haven't excavated the southern portion of the site to the same depth is because ??
I suspect they have been excavated to the same “depth” relative to Front St, but that makes for a shallower hole at the south end because Esplanade is lower than Front.So, the reason they haven't excavated the southern portion of the site to the same depth is because ??