Pocket door and light switches in the upper control room, at the top of the spiral staircase.
Without a conveyor belt, this tripper seems lost. The job of this machine was simply to take grains from the moving conveyor belt and eject it into the silos via the chutes on the sides. Note all the dust collection venting added to the machine to suck up any explosive grain dust.
The tunnels were full of bricked-up doorways. I wonder how many rooms under there are totally sealed from the outside world…
Looking out of a door to nowhere at the fiery sky above.
An old handcart sits next to a rotting elevator.
In the upper left of the image you can see where the gas tanks used to be, along with the concentration equipment. Along the bottom you can also see some of the many railroad tracks coming and going from the plant–the ones visible here were incoming tracks that carried in hard coal from the eastern US.
The bits with handles are the filters with screens of different sizes. Larger grain particles would be stopped at the top for further reduction via the mills, while the powder at the bottom would be run through another bolter–one of the refinement stages in flour production.
In case of fire, workers on higher floors would take the emergency slides to escape.