The incident occurred on Pipiwai Rd, 60km northwest of Whangarei, about 10am today.
Top Energy spokeswoman Philippa White said a logging truck driver lost control just south of the junction with Lovatt Rd and rolled his trailer, felling a power pole and bringing down a high voltage power line.
The driver then got out of his cab and picked up the power line to move it out of the way.
If the line had still been live he would have killed instantly, she said.
Even standing close to a live 11,000 volt line could cause burns or electrocution.
But that wasn't the end of it — another driver then picked up a piece of the broken power pole and placed it on top of the line, which was suspended just above the road, so he could drive over it and continue his journey.