It depends on what you are needing to install. Are you needing to put in water or utility lines? Or are you needing a culvert or a septic tank installed or replaced? Usually anything deeper than 24 inches will require an open trench. Are you not sure what the difference is?

 

That's ok we are here to help make this easier and go over all your options. Open cut trenching is applicable for collapsed pipe, severely broken pipe and heavy root blockages. This method can be less expensive than trench-less methods in non‐pavement areas and does not require roots or debris to be removed from the pipe. However, more excavation is required than compared to trench-less methods and it may require removal of street and sidewalk pavement.