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30 CFR § 57.4533
Mine opening vicinity.
Surface buildings or other similar structures within 100 feet of mine
openings used for intake air or within 100 feet of mine openings that are
designated escapeways in exhaust air shall be--
For further information: See MSHA's Program Policy Manual |
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Mine Safety and Health Administration (MSHA) 1100 Wilson Boulevard, 21st Floor Arlington, VA 22209-3939 |
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