Definition - What does Hydro Excavation mean?
Hydro excavation, sometimes referred to as hydrovacuum excavation, utilizes high pressure water to cut through, and break down the soil, while vacuum is used to remove the resulting slurry from the excavation into a slurry tank. The vacuum source is provided by a fan system which is more commonly used, or a displacement blower which can be used for greater depth. For trenchless sewer rehabilitation work, hydrovacuum excavation is a very efficient method that is precise and saves a lot of space that will be usually needed for the traditional digging method.
Trenchlesspedia explains Hydro Excavation
Hydrovacuum excavation is carried out from a truck and hence saves a lot of space and prevents disruption to traffic by making precision excavation at the desired location. Other than for sewer rehabilitation, this method can also be used to install poles, fence, potholing or daylighting, slot trenching, debris removal, exposing utilities, piling, etc. The main advantage of this method is that it does not harm any utilities that it may encounter while the process is being carried out because water is used as the cutting tool. Because the equipment is operated from a truck it is considered a very versatile method that can be carried out anywhere.