When we're working near lines, which is often, as all lines are above ground, we call the utilities company a couple days ahead, and they come out and slip a heavy vinyl like cover over the lines. It's a free service. They are now stringing fiber optic cables on the poles. if you break one of those, the charge is $10.000.00, plus any amount due to lost revenue for someone who was on-line and was inconvenienced. That's really the truth, though I didn't believe it when I heard it at first, and made subsequent enquiries.