Q. What’s the difference between wet and dry excavation?
Wet excavation, called hydro excavation uses pressurized water to move soil and rock debris away from the utility. A long hose suctions away the displaced dirt, debris and water to a holding tank on a truck.
Some heavily compacted or rocky soils require hydro excavation. The water helps keep the suction hose cleaner by preventing the soil and excavated debris from building up. Two concerns with hydro excavation are: it needs a constant supply of water, and the wet spoils need to be hauled away for disposal. This adds to the time and expense required to complete the job.
For locations that experience cold weather, hydro excavation can use hot water (up to 115 degrees F.) to excavate frozen soil.
Dry excavation, called vacuum excavation, uses pressurized air to break up compressed soil around the utility. The dry spoils are then vacuumed and reused as backfill. In light soils, the vacuum excavator may be able to use high-speed suction to remove soil straight down until the utility line is partially revealed.
Vacuum excavation is recommended when you need to preserve the surroundings, such as tree roots, or nearby buildings or infrastructures. It is also the procedure to use when moving soil away from electrical wires or delicate utilities, or in any situation where water might cause a chemical reaction with the material surrounding the utility.
Q. How many potholes can you complete in a day (assuming average depths of 5 to 7 feet with limited traffic control needed).
A. Given these assumptions, we can complete 4 to 6 potholes in a day, depending on the ground conditions. Contact us to discuss your situation.