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What is Slot Trenching?


Slot trenching is the excavation if narrow trenches. This construction method is used to install pipes, cables, or conduits underground. The holes are sometimes made with pressurized water and other times by manual digging. Depending on what job is being done will determine the method that best suits the project.

Slot trenching with hydro excavation

The process of making trenches using water is called hydro excavation. It is the most preferred approach as it involves less equipment, making it cost effective and safer for workers. Since water is used to break up debris, there is no risk of damage to the utilities underground. After everything is cleared, a vacuum truck sucks up the debris into a tank.

Digging trenches the old-fashion way

Another way to create slot trenches involves manual digging. This is generally done when the project is a lot more extensive but it is not used much anymore. It usually makes a larger, less precise hole than with hydro excavation. The process requires more physical work and heavy machinery resulting in extra labor costs. Manual excavation also removes more soil than needed from a site resulting in change of landscape and damage to surrounding land.


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