Pennsylvania Statutes Title 52 P.S. Mines and Mining § 809. Abandoned mines; sealing entries and air shafts

It shall be the duty of each and every owner, operator, or lessee of any abandoned bituminous coal mine or abandoned working, which is discharging polluted water which flows into any of the streams or rivers of this Commonwealth, or which is in danger of being set afire, to shoot down, or cause to be shot down, or otherwise seal, or cause to be sealed, the entries and air shafts of such abandoned coal mine or working for the purpose of cutting off the supply of air from the abandoned mine or working.