To engage the air brakes on locomotives without their power being on, air hoses would be attached during repairs. Compressed air also powered many of the tools used.
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...based on the tags: hoses, tracks...
One of the only extant assembly line tracks in the body painting department. No photographer leaves Fisher 21 without capturing some version of this spot; hope you like mine.
A better look at the rails in the floor, installed to help move heavy equipment around the building.
The turned rail was to prevent runaway cars from going over the end of the dock and into the lake.
Approaching the power station and its giant stack. The stack replaced four shorter stacks in the 1960s, helping with pollution in the downtown corridor.
A look straight down into the chutes were taconite pellets would dump into the dock hoppers. Rebar was a safety measure to keep workers from being buried alive, were they to slip into the holes.
This photo illustrates how vertical the complex is.
At the top of the Head Frame, over the silo, a space is hollowed-out for ore cars to dump their load before going back underground in search of copper.
Now, to add a human scale.
Note the pit is filled in here.