Around on the backside of the mountain from where the mine was
is where the miners had built their living quarters.
All that is left standing is what was once the kitchen.
There were several of these slabs around the area of what once were buildings for various reasons.
I could find nothing to give me an idea as to a date when this mining activity took place.
Just hauling in all the lumber, cement and machinery alone would have been a major undertaking.
Well Google came through again. I found it was the Desert Queen Mine from 1911 to 1942.
Gold was the primary mineral. Here is a link to the article I found.