Every state by law has a free "Call Before You Dig" service funded by the
utilities. It will be either an "800" number, or in some place (like Tennessee)
simply dial 811.
You tell them you are running a trench and there are cables in the area. They
come out and in within an hour they have your cables flagged.
they have been here two or three times , and marked out my three 1500 ft runs.
No need to rent ($$) equipment for something that is provided for. :)
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