Before the gold could be extracted, the rock was turned to powder. Depending on the size of the steel balls inside the mill, the rock would be reduced to a certain size. So, multiple mills were usually used in stages.
In case power was lost, this manual signal could direct trains on and off the taconite trestle. Turning the pole would change the color of the light on top and the shape of the metal flags.
A wide view (15mm) of the shadow 4B is casting on 4A. Light leaks because of cheap camera.
Originally, this part of the dock was reserved for the weather station.
These dump cars moved copper ore to the top of the furnaces… it’s about two stories above ground level.
Looking from the crane-motor catwalk into the Calumet. The arm shown here with the pulleys looped through it would have been lowered and the bucket conveyor in it would throw grain to waiting ships and boats bound for flour mills and foreign lands.
An original, minimally remodeled bathroom above the cafeteria reminds us what the whole complex once looked like.
The fantastic Art Deco portico over the main entrance to the concourse.