I found a historical photo of this room showing 10-foot high machines with wires hanging by the mile from looms and schematic charts.
On the upper floors where the sunlight is yellow–the color of flour dust, once exposed to the elements.
A closeup of the pulleys atop Manitoba Pool #3 which once pulled conveyor belts full of grain across the cupola building as it was sorted into the silos below.
Copper poured from this furnace and was cast by the autocaster on the right into billets.
One of the pair of motors that powered this mine shaft. In the 1950s, this shaft was designated a rescue shaft, and was only maintained for emergencies. One reason that Cheratte built Shaft 3 nearby was because these motors and infrastructure did not have the capacity that the giant mine below called for.
Beautiful belt wheels above the grain cribs. Getting to the spot where this was taken is now impossible, and I don’t know whether these remain or not anymore.
There big filters helped the mill sort through the flour, for additional milling, for example.
Next to the generator room is the pump room, which moved steam around the complex.
Mammoth Mine overlooks Central City from atop Mammoth Hill. In the distance you can make out Coeur d’Alene Mine (red), which operated from 1885 through 1940.