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GUIDANCE TO PLAN, DESIGN, EVALUATE AND INSPECT ABOVE- DRAINGAGE COALMINES OUTCROP BARRIERS TO PREVENT BLOWOUTS Kewal K Kohli, PhD, P.E., Mining Engineer U.S. Office of Surface Mining, Pittsburgh, PA Fred Block, PhD, Geol
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Document Date: 2009-06-22 09:33:36
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GUIDANCE TO PLAN, DESIGN, EVALUATE AND INSPECT ABOVE- DRAINGAGE COALMINES OUTCROP BARRIERS TO PREVENT BLOWOUTS Kewal K Kohli, PhD, P.E., Mining Engineer U.S. Office of Surface Mining, Pittsburgh, PA Fred Block, PhD, Geol