Old Coke Power House One of the older buildings on the site, this is an old power house that provided electricity to the plant. I spent some time walking around it and believe it was fired with coal gas but had a diesel backup installed later. Similar Images ...based on the tags: boarded-windows, cables, clouds, favorites, grass, pipes, shadows, smokestacks, tanks, towers, vents... National Mine and its rockhouse (?) as seen from Mammoth Hill. From this angle, I am fairly certain this was a crushing and sorting house. The bottom looks like it has two aerial tram doors as well. The back of the castle is barely visible through the trees that have grown thick around the walls, making it look so much older. The bricks routinely fell from the walls, like seeds falling from trees. On a smaller scale, new walls grew from the floors. Energy conserving window plastic does no good when the doors are all open and the heat’s off. This big rusty sphere hides behind the incomplete 5-stack. This is the crane that would be used to lower extra-heavy bits of copper ore into the fire of the furnace. Like a railgun pointed at the Rockies… the boom would direct tailings–junk rock–outside of the dredge pond. To the right is the spiral staircase. This building had a definite “floor problem”. A single cloud makes its way to Buffington Harbor and Lake Michigan from the quiet backroads of the plant.