When potholing, utility crews use a portable vacuum excavator. Initial, check holes, typically measuring 6 to twelve inches deep, are made along the line exactly where they intend to dig or start off construction. They excavate soil with high-speed suction straight down right until the utility line is partly uncovered. https://blissdriveteam.github.io/Bess-Utility-Solutions-Hayward/Potholing-Utilities.html