VAC TRUCK HYDRO-EXCAVATION — NON-DESTRUCTIVE DIGGING

A vac truck — properly called a hydro-excavation or hydrovac truck — uses a high-pressure water wand to break up soil into slurry, then a 15-inch industrial vacuum hose to suck the slurry into a 10-13 cubic yard debris tank on the truck. The result is a precision hole with intact, undamaged utilities at the bottom. No blade, no teeth, no tiger-tooth bucket risking a $40,000 fiber cut.

The reason vac trucks matter on Wasatch Front jobsites is exactly the soil condition that makes open-trench work miserable here. Hard clay and cobble rock — the stuff that slows a mini-ex to 15-20 feet of trench per day — is also the stuff that makes blind digging near a gas line dangerous. A steel bucket edge pulled across clay at 2,000 psi of hydraulic force doesn't stop when it hits fiber, PVC, or PE gas main. Water at 2,500-3,500 PSI does stop — it breaks soil, slides around pipes, and exposes utilities without touching them.

Where we use the vac truck

Daylighting buried utilities. Before any directional bore or excavation near a known utility crossing, we daylight the line — expose it with hydro-excavation to visually confirm depth, direction, and pipe material. Blue Stakes 811 marks locations on the surface but can be off by 18-24 inches in aged cast iron mains or rebar-dense areas. Daylighting removes the guess.

Potholing for directional drilling. Horizontal directional drilling (HDD) contractors require entry and exit potholes to verify grade and elevation of the bore. Our vac trucks cut 2x2 or 3x3 foot potholes to the bore depth without disturbing surrounding utilities.

Deep catch basin and manhole cleanouts. Commercial properties, HOAs, and municipal agencies contract us for scheduled cleanouts — 5-foot storm drain vaults, roof drains clogged with silt, parking lot catch basins full of 10 years of sediment. One pass with the vac truck empties what a shovel crew would take a day to move.

Culvert and curb drain clearing. Utah canal systems, irrigation laterals, and storm culverts fill with debris. We vacuum them out without driving equipment into soft banks.

Emergency spill response. Chemical spills into containment, flooded basements needing bulk water evacuation, industrial vault flooding. Our debris tanks are rated for liquid loads up to 3,500 gallons.

Slot trenching near live utilities. Where conventional excavation would risk strikes, we cut a precision slot trench with the vac truck — 12 inches wide, full utility depth, zero blade contact. Used routinely around buried gas mains, primary electrical, and live fiber.

Subgrade exploration for contractors. General contractors building additions, pool excavations, or structural footings in older SLC neighborhoods use vac truck pothole grids to map unknown utilities before construction starts.

Why the Utah context matters

Winter is the complication nobody warns out-of-state contractors about. Frost depth in Salt Lake County is 30 inches, meaning December through March the top 2.5 feet of soil is frozen solid. A conventional excavator will hammer through it. A hydrovac with a heated water system handles it cleanly — we run 180°F water and the frozen soil breaks apart within minutes. This is a capability most dry-vac or cold-water rigs don't have and it's why our trucks work every month of the year, not just April through October.

Cobble is the other Utah-specific factor. Softball-size rocks in clay matrix don't vacuum through standard boom hoses. Our trucks run 15-inch debris hoses with reinforced walls, 350 HP blowers, and rock ejection systems — enough to pull cobble up 30 feet of boom without clogging. Lighter dry-vac units built for California sandy loam get stuck in the first hour on a Wasatch jobsite.

Pricing model

Vac truck work is hourly, not flat-rate, because no two jobsites are the same. We bill in portal-to-portal hours — truck leaves the yard, works the job, dumps at the approved disposal site, returns — and the rate includes the truck, the operator, the support tech, and dumping fees where applicable. Most residential daylighting jobs are 2-4 hours. Commercial pothole grids run 6-10 hours. Scheduled recurring work (HOAs, property managers, municipalities) gets contract pricing with discounted hourly rates.

Blue Stakes 811 locates are mandatory even for vac truck work — the law doesn't care which tool is doing the digging. We file them on every job and wait the full 48 business hour period before arriving on site. Locating a utility incorrectly and striking it with water is still a strike, still a fine, still a rebuild.

Membership discount

Residential and small commercial customers on our Quality Service Club — $79/year — get 15% off vac truck hourly rates along with every other Valley service. For recurring commercial accounts running 10+ hours per month, we write dedicated service agreements that beat the standard hourly rate and include guaranteed dispatch windows.