I went back to Mine yesterday with the craziest friend I could find and we explored the tunnel all the way to the end. It goes back into the mountain about 1/3 mile and there were two cave ins we had to climb over. I was able to crawl through both cave ins without taking off my back pack so just about anybody could fit through.
Just before the cave in there was a huge shaft doing down with all kinds of ladders. We were afraid to climb them because they were rickety and we didn't have any ropes.
Last time I was at Ruth Mine there was a big hummer type vehicle with license plates that said MINE EXP. We found several cards that they placed throughout the mine advertising their website this time.
When I got home I looked up their website. They took some nice pictures and put up a really nice slide show and article about the mine except they called it the UEC-100 mine instead of Ruth mine. All of my pictures and videos came out black but these guys did it perfectly.
If you are interested in Ruth Mine at all you've got to see this:
http://www.undergroundexplorers.com/uec-100-1.htm
I can't wait to go back with ropes and do some more exploring.