NJ and PA service area
Utility trenching for sites, homes, and farms
Trenches for water, electric, and drainage, dug so the utility or the pipe can go in and the site can be closed back up.

Trenching as part of a site, not a mystery hole
Utility trenching covers water, electric conduit, drainage lines, and similar runs. The trench is dug to the depth and the line the plan or the contractor needs, and it is left in a condition that can be used. On a commercial site that is usually a marked run between the road and the building. On a house it might be the line from the well or the road to the foundation. On a farm it is often power or water to a barn that sits well off the house.
Rock and shale change the speed of a trench in this county. If the run is long, say so. If other contractors are installing the pipe or the wire, the quote is for the excavation and the backfill timing, coordinated with them.
Safety and existing utilities
A trench is not opened until existing utilities are located. Overhead lines also decide whether an excavator can reach the run. Those constraints are easier to price when the address and a sketch are in the request.
Drainage trenches and utility trenches are often the same mobilization. If both are on the job, list them together.