Hydrovac vs Traditional Excavation Cost in Portland, OR: 2026 Comparison

Hydro excavation cost in the Portland metro area runs $250 to $450 per hour for a truck and operator, against $100 to $300 per hour for an excavator and operator doing traditional digging. Hydro excavation, also called hydrovac, breaks soil apart with pressurized water and lifts it out through a vacuum hose, so no cutting edge ever touches the pipe or cable underneath. The hourly rate is the first number most people compare, and it settles the fewest jobs.

Total cost follows what the ground holds and what has to go back on the surface. A hydrovac crew exposing six utility crossings leaves six holes about a foot across. An excavator doing the same work opens a trench, and on a Portland street paved within the last five years the City requires pavement replacement three to five feet past each side of that cut. Our crews price both methods across the metro area every week, and the cheaper one changes job to job. This guide covers what each costs, where each one wins, and which parts of the work Oregon rules put out of reach of a machine.

Hydrovac vs Traditional Excavation Cost at a Glance

Both methods move dirt. They price differently because they produce different amounts of dirt per hour and leave the site in different condition.

What you are comparing	Hydro excavation (hydrovac)	Traditional mechanical excavation
Portland metro rate	$250 to $450 per hour, truck and operator	$100 to $300 per hour, excavator and operator
How it is billed	By the hour, often portal to portal, 2 to 4 hour minimum	By the hour or the cubic yard, 8 hour or one day minimum
Cost by volume	Expensive past a few cubic yards	$2.50 to $15.00 per cubic yard in ordinary soil
Surface opened	One hole about 12 inches across per utility exposed	A trench running the full length of the work
What happens to the spoil	Wet slurry, hauled to an approved disposal site	Dry soil, often stockpiled and reused as backfill
Risk to buried lines	Low, because nothing rigid reaches the facility	High inside the tolerance zone
Allowed within 24 inches of a marked utility	Yes, as a non-invasive method	No
Where it earns its rate	Potholing, daylighting, tie-ins, congested corridors	Bulk digging, open ground, long trenches

The top row makes traditional excavation look cheaper on every job. The rows under it are where the money moves.

Scoping a job and want both methods priced side by side? Request a proposal and we will walk the site with you.

What Each Method Costs Per Hour in the Portland Metro

Hydro excavation is billed hourly for the truck and the operator. Portland metro rates run $250 to $450 per hour, with night work, weekend work, and emergency callouts at the top of that band or above it. Published national ranges start lower, near $150, because rural work with a short haul to a dump site costs less to run than a job in inner Portland. Most contractors here bill portal to portal, so the clock starts when the truck leaves the yard, and most carry a two to four hour minimum.

Traditional excavation is billed hourly or by volume. An operator with a mini excavator, backhoe, or skid steer runs $100 to $300 per hour, and an operator without equipment runs $50 to $150. By volume the work runs $2.50 to $15.00 per cubic yard in ordinary soil and $50 to $200 per cubic yard where rock has to be broken. Minimum project fees of $500 to $800 are common, and most operators bill a one day or eight hour minimum.

The number that decides a bid is the cost of a finished exposure. A crew at $300 an hour that completes three test holes in an hour costs $100 a hole. The same crew at one hole an hour, nine feet down in wet clay with a 40 minute round trip to the dump site, costs $300 a hole. Production sets the price, so ask every bidder how many holes they expect to finish in a shift and what they assumed about depth, soil, and dump distance.

Where Hydrovac Comes In Cheaper

The surface you have to put back

Restoration is the largest single swing between the two methods, and it never appears in an hourly rate. Putting a driveway back costs $2,000 to $4,000, replacing landscaping costs $1,000 to $5,000, and regrading and reseeding a lawn costs $500 to $1,500. A hydrovac test hole is about a foot across, so its patch is measured in square feet. A trench across the same ground is measured in square yards, and on a city street it carries the City’s restoration conditions on top of that.

Crew days and hand digging

A utility owner that requires non-invasive work inside its tolerance zone will keep a machine away from the line, which leaves a crew with shovels as the alternative to a hydrovac. Hand digging a single exposure at six feet in Portland clay can take two people most of a day. A hydrovac clears the same hole in well under an hour and records the depth and offset while the hole is open. That gap is why municipal and utility owners write potholing into the scope, as on our potholing project for the Tualatin Valley Water District in Beaverton.

Working next to something live

An excavator bucket that finds a gas main or a primary electrical duct stops the job, brings the utility owner to the site, and can injure the crew. Water at the pressure a hydrovac uses moves soil and leaves pipe coating and cable jacket intact when the operator sets the wand and the pressure correctly. That is the reason utility owners accept the method inside their tolerance zones, and it is the reason a hydrovac hour on a congested corridor buys something an excavator hour cannot.

Where Traditional Excavation Comes In Cheaper

Volume

Hydro excavation removes soil roughly a cubic foot at a time. An excavator moves a bucket at a time. On a building pad, a basement, a pond, or a long open trench with nothing marked in the way, an hourly hydrovac rate wastes money on every hour it runs. That work belongs to machines, which is how our mass excavation and earthwork crews handle it.

What happens to the slurry

Hydrovac spoil comes out as a wet slurry that cannot be compacted back into the hole as backfill. It is hauled to an approved disposal site, and the trip is billable time on most contracts. Vermeer’s estimating method puts a one foot hole five feet deep at about 3.9 cubic feet of soil, which doubles to roughly 0.3 cubic yards once the water is counted. Ten holes fill about 3 cubic yards, or 606 gallons, so an 800 gallon unit dumps after about 13 holes. A metro round trip to a disposal site can take anywhere from 30 minutes to two hours. Traditional excavation in clean soil produces dry spoil that often stays on site as backfill and costs nothing to dispose of.

Rock and cobble

Water cuts soil and leaves stone alone. Cobbles have to be vacuumed whole or worked around, and anything wider than the hose stops production while the crew clears it by hand. Cobbly ground shows up across parts of the Portland metro area, and it is the most common reason a local hydrovac day finishes behind the estimate. Our guide to how hydro excavation works covers the local ground conditions in detail. Where cobble runs heavy and no utilities are marked, a machine with a breaker finishes faster and cheaper.

Where Oregon Rules Require Hydrovac

Oregon requires hand tools or other non-invasive methods within 24 inches of a marked underground facility, which rules mechanical equipment out of that band entirely. The 24 inch area around every side of a line is the tolerance zone, and OAR 952-001-0090(3)(c) requires an excavator to use those methods either to determine the exact location of the facility or to reach 24 inches below the depth being dug. Hydro excavation qualifies because pressurized water and suction expose a facility without damaging it.

Federal rules point the same direction. OSHA 29 CFR 1926.651(b)(3) states that when excavation operations approach the estimated location of underground installations, the exact location of those installations has to be determined by safe and acceptable means. OSHA addressed hydrovac directly in a 2003 letter of interpretation, holding that when the equipment is adjusted so it will not damage underground utilities, especially ones as vulnerable as electrical lines, it counts as an acceptable means.

The Common Ground Alliance, the national damage prevention body, says the same thing in Best Practice 5.32: vacuum excavation, used appropriately, is an efficient, safe, and effective alternative to hand digging inside the tolerance zone. The practice sets conditions with it. The equipment has to be built for the purpose, run by a trained and experienced operator, and used in compliance with state law.

Facility owners then set their own criteria on top of that, and some treat vacuum excavation as equivalent to hand digging while others restrict how it is used near their lines. Holding PGE Approved Contractor status means our crews work to Portland General Electric’s requirements around energized facilities, and municipalities, water districts, and ODOT each carry their own. Every locate starts the clock on the rest of it: Oregon excavators have to notify the Oregon Utility Notification Center at least two full business days and no more than 10 full business days before digging.

What Portland’s Pavement Rules Do to the Math

A trench in a Portland street paved within the last five years triggers pavement replacement well past the trench itself, and that rule pushes a large share of city work toward hydro excavation. Portland City Code 17.24.100 holds that after a street is constructed, reconstructed, or paved, the surface may not be cut or opened for five years. The City grants exemptions for development, emergency repairs, service connections, and utility upgrades, and it attaches restoration conditions when it does.

Where the cut falls	Minimum pavement replacement beyond the trench
Arterial, cut crosses a travel lane	5 feet on each side of the trench
Arterial, cut affects the parking lane only	3 feet on each side of the trench
Local street	3 feet on each side of the trench
Lengthwise run inside a single lane	Full pavement restoration for the width of the lane
Bike lane	Restored in its entirety

The patch also runs out to the nearest lane line or street centerline, and every trench cut follows the City’s standard t-cut with at least a six inch base overlap on each side. A 40 foot trench two feet wide on a local moratorium street opens 80 square feet of pavement and requires roughly 320 square feet of replacement. Six hydrovac test holes across that same run open about five square feet. The gap in asphalt is frequently larger than the gap in the hourly rate.

The Cost That Neither Bid Shows

A utility strike is the expense that settles the comparison on its own. The Common Ground Alliance’s economic impact study modeled close to 700,000 damages nationally from its 2025 damage reporting data and put the annual burden at $83.2 billion. Repairing the broken line is the smallest share of that total. The rest is emergency response, lost business, injuries, and the community and environmental effects of a gas release or an outage.

On one Portland job a strike means a stopped crew, a utility crew mobilized at your expense, a damage report, and a schedule that slides past the permit window. Insurance absorbs part of it. Losing an owner’s approved contractor status costs more over a year than any single repair.

Precision is the other half of the value. ASCE 38-22, the standard design teams use to describe how well a utility’s position is known, reserves its highest rating, Quality Level A, for utilities that have been physically exposed and measured in the field. A test hole is how a project reaches that level, and vacuum excavation is how the test hole gets dug. A scope that calls for Quality Level A data is buying hydro excavation whether the specification names the method or not.

A Portland Job Priced Both Ways

Here is one scope run through both methods: six utility crossings to expose ahead of a duct bank, average depth six feet, on a local Portland street repaved two years ago. The figures show how the two cost structures behave on a representative scope, with every assumption written out so you can substitute your own.

Line item	Hydro excavation	Traditional excavation
Field work	6 hours at $295, about $1,770	6 hours at $200, about $1,200
Spoil handling	One disposal run, roughly an hour of billable time	Stockpiled on site and reused as backfill
Pavement opened	About 5 square feet	About 80 square feet of trench
Restoration required	Six small patches	About 320 square feet under the moratorium rules
Work inside a marked tolerance zone	Permitted	Not permitted

The field work line favors the excavator by roughly $570. The restoration line reverses that several times over, and the last line removes the choice on any crossing that sits inside a marked tolerance zone. That pattern is why most utility work in the metro area uses both: machines for the bulk of the trench in open ground, a hydrovac for the crossings and tie-ins. Our utility trenching and construction excavation crews run that split on most jobs.

How to Compare a Hydrovac Bid and an Excavation Bid

Two bids for the same scope routinely arrive thousands of dollars apart because they assume different production and different responsibilities. Check each one for these items before comparing totals.

• Production assumptions. Ask how many exposures the bidder expects per shift, at what depth and in what soil. A lower hourly rate at half the production costs more per finished hole.
• Portal to portal or on site. Confirm whether the clock starts at the yard or at the curb, and what the minimum charge covers.
• Disposal. Find out whether slurry disposal is included, where the material goes, and whether the dump run is billed as time.
• Water. Hydrant access on site removes refill trips from the bill, and someone has to arrange the meter before the truck arrives.
• Restoration standard. Ask who patches the asphalt, to what standard, and whether the bid accounts for moratorium restoration if the street was paved recently.
• Permits and traffic control. Right of way work needs a street opening permit, and lane and parking closures are priced separately.
• Deliverables. A test hole is worth what gets recorded. Ask for measured depth, facility size and material, horizontal offset from a fixed reference, and a photograph.
• Certifications. Utility and public works packages require specific credentials, so confirm the bidder holds what the owner requires before the bid goes in.

Get a Hydrovac or Excavation Estimate in Portland

Angelo Underground runs both hydro excavation and mechanical excavation for commercial, municipal, and residential projects across the Portland metro area. We hold Oregon CCB license 243015, we are a PGE Approved Contractor and an Avetta Consortium member, and we are Public Works and ODOT certified, which qualifies us for utility and agency packages. Every project starts with a site walk, so the method follows the ground and the locate marks.

For the method itself, our guide to utility potholing covers what a test hole produces and what to ask for in the record. Our hydrovac excavation and potholing service page covers scheduling, equipment, and service area. If you are pricing underground work more broadly, our Portland sewer line replacement cost guide breaks down the permit and restoration side of a trenched job. Request a proposal and we will price your scope both ways.

Frequently Asked Questions

Is hydro excavation more expensive than traditional excavation?

Hydro excavation costs more per hour and frequently costs less per job. Portland metro rates run $250 to $450 per hour for a hydrovac truck and operator against $100 to $300 per hour for an excavator and operator. The total flips once surface restoration, spoil disposal, and the risk of a utility strike are counted, which is why hydrovac usually wins on paved streets and congested corridors while a machine wins on open ground.

How much does hydro excavation cost per hour in Portland, OR?

Expect $250 to $450 per hour for a truck and operator in the Portland metro area, with a two to four hour minimum. Night work, weekends, and emergency callouts sit at the top of that band or above it. Most local contractors bill portal to portal, so travel time from the yard is on the clock.

What are the disadvantages of hydro excavation?

The hourly rate is higher than mechanical equipment, and the wet slurry it produces has to be hauled to an approved disposal site because it cannot go back in the hole. It also loses to a machine on volume and on rock, since water cuts soil and leaves cobbles to be vacuumed whole or worked around. The method earns its rate on the portion of a job that has to be dug without touching a utility.

Do Oregon rules require hydrovac near buried utilities?

Oregon requires hand tools or other non-invasive methods within 24 inches of a marked underground facility, and hydro excavation is one of those methods. OAR 952-001-0090(3)(c) applies that requirement either to determining the exact location of the facility or to digging 24 inches past the intended depth. Excavators also have to notify the Oregon Utility Notification Center between two and 10 full business days before work starts.

Why does hydrovac spoil cost more to get rid of?

The spoil leaves the hole as a slurry of soil and water, which cannot be compacted back in as backfill. It goes to an approved disposal site, and the round trip is billable time on most contracts. A one foot hole five feet deep produces roughly 0.3 cubic yards once the water is counted, so an 800 gallon unit fills after about 13 holes and the crew leaves to dump.

Which method is cheaper on a Portland street that was recently paved?

Hydro excavation, in almost every case. Portland City Code 17.24.100 bars cutting a street for five years after it is paved, and a permitted cut on a moratorium street requires pavement replacement of three to five feet on each side of the trench, extended out to the nearest lane line or centerline. Six hydrovac test holes open about five square feet of asphalt, while a 40 foot trench on the same street can require more than 300 square feet of replacement.

Can one job use both methods?

Yes, and most utility work in the Portland metro area does. Machines handle the bulk of the trench through open ground where nothing is marked, and the hydrovac handles the crossings, the tie-ins, and anything inside a tolerance zone. Paying a hydrovac rate to dig open field wastes money, and putting an excavator into a marked gas corridor risks far more than the difference in rate.