According to some of the local people that I spoke to, this cave and other caves in the area have been used for teen drinking parties since the early 1970's, and that was quite obvious once we were inside.  The destruction, graffiti, and trash have taken their toll on these caves over the years.  No petroglyphs or pictographs were found in or near these caves, but I was told that back in the 60's a few pictographs were still visible inside.