C.F.R. » Title 30 » CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR › SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH › PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES › Subpart S—Miscellaneous

30 C.F.R. § 57.20020

Unattended mine openings

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Access to unattended mine openings shall be restricted by gates or doors, or the openings shall be fenced and posted.