Well, the name might overreach just a bit.  The museum is on the site of the Orphan Girl Mine in Butte MT and includes the restored community that housed and served the miners up until the mine closed in 1950.  Scattered across the property is a collection of mining equipment from around the area through the years.  Most impressive to me, in a creepy sort of way, the headframe, hoist and cages that lowered these workers everyday into a shaft 2700+ feet deep.  Oh, I could so not do that.  It made me cringe a bit to stand in one of the cages at ground level.  One hallway was lined with stark black and white photos of miners as they have emerged from their workday.  I have seen similar collections various places.  These smudged faces, especially their eyes speak volumes.

I suppose it was a necessity before power equipment but here is a really disturbing fact; they worked as many as 1000 mules at a time down in the mines.  They went blind in weeks in complete darkness.  A photo sequence shows how they harness, restrain and handle the mules to get them into the cages to lower them into the mines.  As the cage disappears into the shaft, the mule is sitting upright in a canvas jacket and a hood covering its head.  Its legs are bound against its body.