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Just learned of the structural conflict between two trades I always assumed were allies: the underground service alert crews and the utility trenching crews.
I should have figured it out sooner: the USA crews are only going to locate accurately enough to stay out of trouble; if the utility crews have to dig twice as much to actually find a pipe, it's not their problem.
Another case of industry setting workers against each other.
@ImagineThat This is interesting, and may answer a question I had about a large waterline project near us that's scheduled for next year. A USA crew came in and marked the utilities, then a second crew came in and dug what I'd call pilot holes within the USA markings, and immediately filled them in. I wondered if they were doing that to verify the locations of the utilities before the project started. Based on what you learned that might be the case.