American Shipbuilding has left Chicago. But this post taught me there is still a repair facility in Chicago. I counted four floating dry docks in the satellite image.
Robert Farrrell posted two photos with the comment: "Wish I had the damage picture. A quick repair at Chicago dry dock!"
TPG Marine bought Chicago Dry Dock in Dec 2014.
"The shipyard is the only facility of its kind to offer unencumbered access to both the Great Lakes (via Lake Michigan) and the Inland River System (via the Calumet/Des Plaines/Illinois Rivers)."