These machines circulated water through the powder from the ball mills. Gold and silver is heavier than gravel, so it sinks while the junk rock floats.
The only good shot I have of the top of Battery A, in the upper left. Though it seemed to have been disused before its neighbor it had a lot less growth on it.
Note the tiled floor between the bucket conveyors and an old mill.
Water at the bottom of the silo was perfectly clear.
These stairs were probably removed to discourage scrapping and graffiti. Ask me if it worked.
The generator hall of the last power station, as seen from the gantryway.
This was one of two skyways that went between production line offices. It’s easy to tell because it’s not reinforced for machinery to travel through it. I also like that it’s a double-decker, so to speak.