Three days after a Pennsylvania woman searching for her ... drop into a damp, dark hole where coal mining ended seven decades ago. After overnight snowfall left a thin coating on the ground ...

But, today, that mining has hollowed out the ground beneath us. Pennsylvania’s inventory of abandoned coal mines is larger than that of any other state in the nation, and the Keystone State has ...

Mine inspectors in Pennsylvania have about 98 underground and surface bituminous coal mines to inspect and 60 anthracite mines, according to the state Department of Environmental Protection.