Booms and masts; minimum distance from high-voltage lines.

  1. Law
  2. CFR 30
  3. Mineral Resources
  4. Mine Safety and Health Administration, Department of Labor
  5. Coal Mine Safety and Health
  6. Mandatory Safety Standards, Surface Coal Mines and Surface Work Areas of Underground Coal Mines
  7. Surface High-Voltage Distribution
  8. Booms and masts; minimum distance from high-voltage lines.

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§ 77.807-2 Booms and masts; minimum distance from high-voltage lines.

The booms and masts of equipment operated on the surface of any coal mine shall not be operated within 10 feet of an energized overhead powerline. Where the voltage of overhead powerlines is 69,000 volts, or more, the minimum distance from the boom or mast shall be as follows:

Expand Table
Nominal power line voltage (in 1,000 volts) Minimum distance (feet)
69 to 114 12
115 to 229 15
230 to 344 20
345 to 499 25
500 or more 35


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