I especially enjoyed the picture of the IAIS reload facility in Blue Island with the loop. The cluster of little power is the former CWP engine house in Irondale. The former Wisconsin Steel slag dump is about two blocks north of the engine house. When I was in high school, I would change buses at 104th & Torrence (about 1 block west) on a daily basis.
That IAIS transloading facility, in Blue Island, was once a freight-car manufacturing facility for the United States Railway Equipment Company (Evans Products).
That “strange little Roundhouae” is on the former Inland Steel property and was built to handle sw-7’s and 9’s. Right near it is a tunnel entrance where the trains - and brave motorists - can go into a tunnel and come up on the other side of Dickey Road in plant two. I only ever did it once with great fear and trepidation I would come nose to nose with a train in spite of the traffic light saying it was ok.