You can tell from the marks on the wall that there used to be pipes running the length of this square hallway, which connected a loading dock with explosive mixers.
This elevator was built in 1922 and was used until the passing rails were removed in the mid-1970s.
The doorframes become more askew every year as the buildings slip downward into the gulch at different rates. This seems to be the part of the mine ruins where transients leave their marks. The graffiti dated back to the 1970s, at least.
The top of the barracks staircase.
I believe these hooks were meant for hanging filters to dry.
Before each warhead was crated, it was inspected.
Unloading boats had the option to take on fuel at Taconite Harbor. This building, among other things, pumped fuel to the dock.