The following is a marine accident brief from the National Transportation Safety Board (NTSB):
(WASHINGTON) — On the evening of June 7, 2017, the unmanned crane barge Troy McKinney broke free from its mooring and struck overhead power lines crossing the Harvey Canal in Harvey, La. No pollution or injuries were reported. Damage to the crane barge was negligible, but damage to the power lines totaled about $440,000.
Probable cause
The National Transportation Safety Board determines that the probable cause of crane barge Troy McKinney striking and damaging overhead power lines was its insufficient mooring arrangement, which did not prevent the barge from excessive movement and breaking away.
Click here to read the report.