This might have been part of the Pioneer Pellet Plant. It looks to be a ball mill, which pulverizes ore by spinning it with thousands of ball bearings.
This picture shows the challenges of moving around underground in the base.
A sign in the desolate cafeteria.
A detailed look at the side of one of the thousands of transformer boxes in the war city.
“What’s that diamond thingy on the Pilot House?” you ask? It’s a 1920s-era radio transmission direction finder, a pre-radar navigation aid. Lit with diffused flash.
The conveyor between the shore and Dock 2. Note the gap in the aerial walkway that used to connect Dock 4 to the rest of the complex.
“W.N 7-30-86”. Brick Graffiti Series.
This machine was last overhauled in February 1955, and last turned out Crepe silk, probably dress material.
A stencil instructs the first and third shifts to ask security for access. Security was out during all my visits, except one mishap where a strung-out local chased me with a truck. Having spent a decade exploring the U.P., I was not caught off guard.