When potholing, utility crews use a transportable vacuum excavator. Initial, exam holes, generally measuring 6 to 12 inches deep, are created alongside the line the place they decide to dig or begin building. They excavate soil with substantial-pace suction straight down right up until the utility line is partly uncovered. https://blissdriveteam.github.io/Bess-Utility-Solutions-Hayward/Potholing-Utilities.html