Part of the Pillsbury tunnel that brought water back to the Mississippi River.
The piano must have been a nice distraction; there is very little to do in Roberts.
This big rusty sphere hides behind the incomplete 5-stack.
This picture gives you the idea of how the boat-loading control rooms are set up; they lean over the dock and Lake Superior to be able to see down into the holds of the boats… important, considering how quickly it loaded the boats! An uneven load could put stress on the hull of a laker, increasing the risk it will break and sink.
Looking into the engine works from the concrete addition.
In the mine offices, a training manual for miners sits open. Here’s how you signal to the surface if you are trapped after a disaster.
While the maps name this the compressor house, I believe, based on its size and number of heavy machine mounts, that it also housed the pumps to drain the mine.
An unintentional skylight makes the inside of the office glow, showing the inside of the front door and its strange lock.
A warped mirror in the rock crusher at the rear of the complex.