30 C.F.R. § 77.1011 Drill holes; guarding.
Title 30 - Mineral Resources
Drill holes large enough to constitute a hazard shall be covered or guarded.
Title 30: Mineral Resources
PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES
Subpart K—Ground Control
§ 77.1011 Drill holes; guarding.
