Pennsylvania Geological Survey - Historical Photographs

Active Filters:
  • Location Covered = Clearfield
  • Subject = Engineering Geology

About This Collection

This collection includes photographs from the Pennsylvania Geological Survey Historical Photographs Collection.
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Underground mine collapse
Underground mine collapse
Engineering Geology
Underground mine collapse, Upper Kittanning coal, east of Falls Creek, near Hummingbird Racetrack.
Underground mine collapse
Underground mine collapse
Engineering Geology
Underground mine collapse, Upper Kittanning coal, east of Falls Creek, near Hummingbird Racetrack.