That's a real pity about the Alter site(s). On both the north corners of Cermak and Prairie, half block to the west of this, there are large short worthless buildings...
This is the guy in question, McCormick 2007 is behind me:
From the west:
From the Hyatt, on the left side. The tech center (actually one of the most important internet traffic interchanges in America) is on the right:
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I've tried to find some more information on the diesel-powered cranes, vs. electric, but no luck. Except that they're getting more popular in America, I guess because with an electric crane you still have to have a diesel generator somewhere on site. Does anyone have anything more technical, like product spec pages?