A barge lends a hand as glass is installed at the new Apple Store.

Last week, I learned it takes a whole mess of suction cups to a glass curtain wall on an Apple Store. It was also a thrill to see a barge being utilized in construction once again, something I’d hoped — actually, kind of assumed — would happen, given the Apple Store’s proximity to the Chicago River. And there’s no mud to be excavated, so it probably won’t sink.