Created 17-Feb-16
Modified 17-Feb-16
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Coal Mining, Black Thunder, WyomingPowder River BasinBlack Thunder Coal Operation, WyomingBlack Thunder Coal Operation, WyomingBlack Thunder Coal Operation, WyomingBlack Thunder Coal Operation, WyomingBlack Thunder Coal Operation, WyomingBlack Thunder coal operation, WyomingBlack Thunder Coal Operation, WyomingBlack Thunder Coal Operation, WyomingPowder River BasinArch Coal/Sunset Roadless AreaArch Coal/Sunset Roadless Area