30 CFR § 57.7055
Intersecting holes.
Holes shall not be drilled where there is a danger of intersecting a misfired hole or a hole containing explosives, blasting agents, or detonators.
[56 FR 46517, Sept. 12, 1991; 56 FR 52193, Oct. 18, 1991]
30 CFR § 57.7055
Intersecting holes.
Holes shall not be drilled where there is a danger of intersecting a misfired hole or a hole containing explosives, blasting agents, or detonators.
[56 FR 46517, Sept. 12, 1991; 56 FR 52193, Oct. 18, 1991]
