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: ------------------------------------------------------------------------
Minimum
Nominal power line voltage (in 1,000 volts) distance
(feet)------------------------------------------------------------------------69 to 114................................................... 12115 to 229.................................................. 15230 to 344.................................................. 20345 to 499.................................................. 25500 or more................................................. 35------------------------------------------------------------------------