1 Cu/Au; 3 Au; 2,5 Ag; 3 ?
Very observant, Tramp. I took that pic before I started down the ladder, which broke off two feet above the bottom about the same time the rungs I was standing on and holding onto failed - dry rot. I rode the thing to the bottom - only scraped a little hide off an arm. The ladder shown was a feeble replacement made with an 8' crooked piece of oak that was bug-rotted. The rungs were nailed on with horseshoe nails, so it was pretty old - maybe 1930's, based on the area's history. It looked OK, but it wasn't. I imagine some cowboy salvaged the original juniper notched log many years previously for a conversation piece. I`m glad you were able to make it out OK, a close call for sure.
Ha ha, anyway, despite the extremely stupid thing I did, at least I was smart enough to have lowered my pack to the bottom of the hole (8' deep) before I tried the ladder (packing a 20' length of climbing rope has often come in handy). Well, fortunately there was a pile of good-sized rocks in the mine. I was able to build a two-foot high pyramid out of the rocks, which was good because my ladder was now only six feet long and wouldn't reach the eight foot high lip at the top of the hole. You can see the walls were concave all the way around the top lip - like a bell with no vertical sides to lean the ladder on. Next, I cut steps into the log with my handy-dandy folding saw (6" blade). Then I swung the jerry-rigged ladder back up and the top caught the lip above and I wedged the bottom tight into my rock pile.
Now I figured I could get out, so I explored the mine for awhile. When I was ready, I carefully skinnied up the pole and grabbed onto some brush at the top to get me over the edge. Then hauled my pack back up and thanked my lucky stars.
My explorations are almost always solo and I should never have tried to go into that hole. My girlfriend would have called my buddy that night if I hadn't returned. He would have found my truck the next morning, but I was three miles away from where I parked. I could have fired my pistol and hoped it would be heard - for whatever good that would do. I had my ham radio with me (always) and I might have been able to get a signal in that hole and talk him to my location. Maybe.
Bottom line: be prepared - things happen.