On February 26, 2004, the boom of a mobile crane being transported along a road struck a 13.2 kilovolt power line
hung about 30 feet above the road. This caused arcing, separated all three lines of the three-phase distribution line,
and damaged the crane’s boom and cable. The crane operator had previously raised and lowered the boom to
negotiate turns and had successfully passed under a 16-foot-high power line. However, the boom control
mechanism subsequently malfunctioned and the operator’s attempts to free it only raised the boom higher.
3/2004
Los Alamos National Laboratory, Firing Sites and HE Lab
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Stanford Linear
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