30 C.F.R. § 57.11012 Protection for openings around travelways.
Title 30 - Mineral Resources
Openings above, below, or near travelways through which persons or materials may fall shall be protected by railings, barriers, or covers. Where it is impractical to install such protective devices, adequate warning signals shall be installed.
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart J—Travelways and Escapeways
Travelways—Surface and Underground
§ 57.11012 Protection for openings around travelways.