It extends over 100 feet and is about 200 feet wide.

147

The state has demanded maps from mining companies from the beginning, so there is a good map library. But, those maps were mainly a way for the state to collect royalties. That means that some shafts were not mapped.

134

They are looking at their GPS devices and may not see a collapsed mine and fall into it.

113

When they were done mining, they used to dump old stumps, car bodies, slop that they didn't want into the entry and cover it up. That only lasts 30 to 50 years.

87