If you go to the spot that we found the tailgate, walk over to the creek and follow it downstream a few hundred feet, you will eventually find the pipes that were coming from one of the mine entrances. Although there is a subdivision built on top of the old entrances you will still find the pipes laying in place on the ground. I think they were used to pump water out and pump air in. Be sure to locate them first before you dig, it would be a shame to see them destroyed. I will post photos tomorrow.