yes this is the bluebird mine and what you are seeing is a fault that was mined. if you stand on the hill to the east you can line up the shafts with the fault. my family had a friend that was a state mine inspector and he told us that he had been down in the mine a bunch of times to do inspections and that it was a large fault that had been mined. at one time bluebird was one of the largest molly mines in the us. copper creek is a great area to play in and get away to relax. here a few links to some info on copper creek.
http://www.vintagephoto.com/reference/coppercreekarticle/coppercreekarticle.html
http://www.americansouthwest.net/arizona/copper_creek/ghost_town.html