F.L. Jennings
Bronze Member
It's amazing how many caves/openings/old mines there are across the land. On some projects the engineering company I used to work for did, and in the observations of steel piling being driven, many H piles often "free fell" many feet all on their own. This was in the limestone of the Ozarks north of the White River.
Instances of these underground openings of unknown origin are encountered pretty often by excavators, pile drivers & etc.
Instances of these underground openings of unknown origin are encountered pretty often by excavators, pile drivers & etc.