It’s gone now.
The former Morton Salt building, more recently the former home of GGP (General Growth Properties) at 110 North Wacker Drive, is a dirt lot now, as can be seen in the above photo shared by Twitter user @JoshatNRDC. (Great view of the new tower construction, Josh! I’ll bring the coffee if I can borrow your windows for a few hours a day.)
You can kinda sorta watch the demo work by Heneghan Wrecking along the way in the photo gallery that follows. Coming soon: a shiny new 54-story office tower from Howard Hughes Corporation and Riverside Investment & Development, designed by Goettsch Partners.