[Pandemonious]

Ok, so the tower portion of the building is 80' at its narrowest, but that doesn't mean that the base of the tower isn't significantly wider, right? The parking lot currently there is ~110' wide N-S.. so the total building overall has slightly less than an 8:1 slenderness ratio.. which is slender, but not that slender for a reinforced concrete building. I'd say the slender portion of the building isn't more than about 700' tall.

I am working on a reinforced concrete supertall building that has a roughly 9:1 slenderness ratio AND leans out cantilevering over 20+ feet at the top. We have some thick shear walls at the base, but it really isn't that complex.

We have no tuned mass damper either..
This tower is definitely doable, regardless of where it is in the city.

I say there is more going on, or they had a half ass engineering job to begin with, which seems unlikely since P/H has done highrise buildings before, although not as tall.