Before the gold could be extracted, the rock was turned to powder. Depending on the size of the steel balls inside the mill, the rock would be reduced to a certain size. So, multiple mills were usually used in stages.
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...based on the tags: collapsing, doors, gears, machinery, mills...
The workshop sat below the main working floor and had serious power going to it.
A colorful boiler is a happy boiler! RotoGrate systems remove ashes from the boiler firebox by revolving the bottom of the system to let the fly ash drop into a hopper. This greatly increases boiler efficiency.
Gilman had a bowling alley.
I made this picture to give the reader a sense of the slope between the mine buildings and the base of the concentrator. The whole area was really steep, and sometimes required scrambling to get up and down the Picayune Gulch for short distances.
On the left is the broken glass room that contains the controls for the cable spool, now gone, that sat in the metal shell on the right. The stairs led down to the hoisting engine itself. You can make out the slits where the cable ran up to the headframe tower through the gaping archway.
Beautiful details in the plaster moulding have been preserved by the sheer height of this room between the cathedral and auditorium.
This is the former air compressor house–one of them, at least–which turned steam power into air power to drive machinery across the production line.
The gold mine is now a gravel pit.
The side of the church, taken from a grungy sidewalk.