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  1. PA Abandoned Mines - Millersville University of Pennsylvania

  2. Bureau of Abandoned Mine Reclamation - Pennsylvania DEP

  3. Coal, once king in Pennsylvania, leaves behind abandoned mines

  4. Abandoned Mine Reclamation in Pennsylvania - ArcGIS StoryMaps

  5. Pa. sinkhole: Underground voids from mines pose danger - WHYY

  6. Federal funding targets Pennsylvania's abandoned coal mines

  7. How DEP’s Mining Program Brought Thousands of Old ... - Pennsylvania

  8. PA’s Mining Legacy and AML - Pennsylvania DEP

  9. Federal funding targets Pennsylvania's abandoned coal mines

  10. Shapiro Administration and U.S. Department of Interior Secretary …