New power to a shop, a water line to an ADU, a sewer stub for a new home. Utility work comes down to digging the right trench in the right place to the right specs. That's what we do, from the first locate to the final backfill.
Utility Excavation in Boise and the Treasure Valley
The Treasure Valley keeps growing, and every new house, shop and business needs utilities run to it. Older properties need them too. People add a detached garage, finish an ADU for family, or put in an EV charger out by the barn. All of that means digging.
We do utility excavation for homeowners, electricians, plumbers and builders in Boise, Meridian, Nampa, Eagle, Kuna, Star and Caldwell. Most jobs start with a question about route: where the line leaves the house or meter, where it needs to end up, and what's buried in between.
Types of Utility Excavation Projects
Power to shops, ADUs and wells
This is one of the most common jobs we see. Running underground power to an outbuilding, a well pump or a new service takes a trench at a set depth with conduit in it. On many new services, Idaho Power lets the owner provide the trench to their specs, which can save time. We dig to the depth and layout the utility or your electrician gives us.
Water and sewer lines
Water service lines, sewer laterals and stubs for new homes. Water lines have to stay below frost, and sewer lines need steady fall. We go into more detail on our water line excavation and sewer line excavation pages.
Gas lines
Natural gas in most of the valley is Intermountain Gas. Gas service work is done by the gas company or a licensed installer, and we can dig the trench when the job calls for it.
Fiber, phone and low voltage
Fiber drops, phone lines, data lines between buildings, and conduit for cameras, gates and landscape lighting. These lines are usually shallow, but they still need conduit and a route that won't sit under a future patio or garden bed. Laying an extra empty conduit while the trench is open costs little and can save a second dig later.
Drainage systems
Storm drains, downspout lines and French drains are utility work too. They follow the same locate and backfill rules, but instead of a set depth they need steady fall from start to finish. See our drainage excavation page.
Sharing a Trench to Save Money
When power, water and communications all go to the same building, they can often share one trench. Each utility has rules on how far apart lines have to sit and which can share at all. Gas and power, for example, have separation rules. We follow the layout and spacing the utilities and your trades give us, so the work passes inspection the first time.
Safety Around Existing Utilities
Digging near live lines is where utility work gets risky. We call Digline (811) at least two business days before every dig, as Idaho law requires. Locators mark public lines like power, gas and city water, but they don't mark private lines. A sprinkler main, a line to a hot tub or power to a shop you put in years ago won't show up. Tell us about anything like that.
Near marked lines we dig carefully and expose them by hand where we need to. Paint marks show roughly where a line runs, not its exact depth or position, so the last stretch near a mark gets slow, careful digging. Any trench 5 feet or deeper gets sloped, benched or shored under OSHA rules.
What Happens After the Trench Is Dug
Once the trench is open, your electrician or plumber lays the conduit or pipe. Many jobs then need an inspection from the utility, the city or the county before anything gets covered, so the trench may sit open for a day or two. After it passes, the line gets bedded in sand or fine material where the specs call for it, warning tape often goes in above it, and the trench is backfilled and compacted in layers so it doesn't sink.
Soil and Site Conditions
Ground conditions change from one side of the valley to the other. Caliche and hardpan are common in Meridian, Nampa and Kuna. Basalt sits close to the surface in parts of Southeast Boise and Kuna. Near the Boise River, cobble and a high water table during irrigation season can make a trench fill with water. The foothills dig easier but cave if the walls are too steep. We like to see the site before we price it.
Residential and Commercial Utility Work
We dig utility trenches for homes, and for commercial jobs and new construction too, including utility runs for commercial excavation projects and new home sites. Builders can send us plans and stakes and we'll work to them.
Utility Trenching
Most utility work comes down to a trench. We dig trenches for power, water, gas, sewer, communications and irrigation lines at the depth each one needs, with bedding where the pipe or conduit calls for it. When several lines go to the same building, a shared trench can save digging as long as each utility's spacing rules are met. After the line is in and inspected, we backfill in lifts and compact so the trench doesn't sink. See trenching services for more on the trenching side.
Why Hire Ultimate Excavation LLC
We're an Idaho registered contractor (RCE-65836) based in Caldwell with a 5.0 rating on Google. Our reviews mention Tanner's communication again and again, and that matters on utility work, where your electrician, plumber, inspector and the utility company all need to be on the same page. Call (208) 697-2429 or request a free estimate.
