Trenching for water, sewer, electrical and communications lines across the Tri-Cities, WA — dug to code, bedded and backfilled so it does not settle.
Properly trenched utilities are what make a property livable and a build site functional. Big Mountain Excavation trenches for water, sewer, electrical conduit and communications lines throughout the Tri-Cities, digging to the depths required by code and utility standards and bedding and backfilling so the trench does not settle into a low spot later.
We coordinate 811 locates before any trenching, work around existing underground utilities, and schedule connections with the utility companies so your project is not waiting on a ditch. From a single water lateral in Kennewick to a full utility run for a new build in Walla Walla, every trench is dug to last.
Trenching looks simple, but depth, bedding and backfill determine whether a line holds up for decades or fails in a season. We trench to the depth your utility and code require, bed the pipe or conduit properly, and compact the backfill in lifts so the surface above it stays flat and stable.
We handle straight runs, crossings and connections, and we plan the trench path to minimize disruption to your yard, driveway and existing utilities.
Where municipal water and sewer are available, we trench the laterals that connect your property to the main. We dig to the depth and slope the utility requires, bed the pipe, and backfill and compact so the line is protected and the ground above it does not settle.
We coordinate the tap and inspection with the utility so the connection happens on schedule and the line is ready when you need it.
Water and sewer lines need specific depth and slope to flow correctly and stay below frost depth. We set the grade as we dig, bed the pipe in material that supports it, and protect the line from sharp rock or voids that cause failures.
We trench for electrical conduit and communications or fiber lines, digging to the depth required for the service and bedding the conduit so it is protected from settling and future loads. Proper conduit depth and bedding prevent the damage that shows up when a trench was dug too shallow or backfilled carelessly.
We work with your electrician or provider to make sure the trench path, depth and backfill meet their requirements the first time.
Before any trenching, we arrange 811 locates so existing underground utilities are marked and protected. Cutting a line that was never located is how trenching jobs turn into emergencies, so we do not skip it.
After the line is in, we backfill with approved material and compact in lifts so the trench does not become a soft spot or a low area across your driveway or yard. The finished surface is left ready for whatever comes next.
Big Mountain Excavation is owner-operated, has been in business for more than 8 years, and is fully insured. We serve Kennewick, Pasco, Richland, Walla Walla and the surrounding area.
From a single water lateral to a full utility run for a new build, we bring the equipment and the experience to get it done. Request a free estimate to get started.
Depth depends on the utility and local code, typically 18 to 36 inches or deeper for some lines. We trench to the exact depth your utility or code requires and bed and backfill to protect the line.
Yes. We arrange 811 locates before any trenching so existing underground utilities are marked and protected.
Yes. We trench for water, sewer, electrical conduit and communications or fiber, bedding and backfilling to code so the trench does not settle or damage the lines over time.
Kennewick, Pasco, Richland, Walla Walla and the surrounding Tri-Cities area.
Big Mountain Excavation
Insured · Experienced · Local