30 CFR §77.807-3
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
When any part of any equipment operated on the surface of any coal mine is required to pass under or by any energized high-voltage powerline and the clearance between such equipment and powerline is less than that specified in § 77.807-2 for booms and masts, such powerlines shall be deenergized or other precautions shall be taken.