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17th Annual PA Abandoned Mine Reclamation
Conference, State College, PA
Robert E. Hughes Michael A. Hewitt
Executive Direc...
1762 - Connecticut settlers discover anthracite coal seams in the Wyoming Valley and estimate 16 billion tons of coal lie
...
18
9
2438
Also, 4
distinct
alkalinity
generating
zones in
Northern
Field
A “Few” Layers
of Complexity…
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