How much does hydrovac cost?

STA 0+120Why there is no published hydrovac rate

No provincial government, municipality or StatCan table publishes an hourly, daily or per-metre hydrovac rate. Hydrovac (hydro excavation) uses pressurized water to break up soil and a vacuum to remove it into a tank, a non-destructive method used specifically where digging mechanically would risk damaging what is underground. It is not a tendered highway pay item the way mechanical excavation is, and almost all hydrovac work in Canada is billed directly by private operators on an hourly or day-rate basis that is not captured in any public tender dataset this site draws on.

That absence is itself informative: unlike excavation, asphalt or gravel, there is no government body anywhere that tenders hydrovac work at a scale that produces a bid average. It is a specialty trade service, priced like one.

STA 0+240Why hydrovac gets specified at all

Hydrovac costs more per cubic metre than mechanical excavation, and it is often required rather than chosen, for regulatory reasons. In Alberta, mechanical excavation is not permitted within 600 mm of a buried pipeline without the pipeline owner's representative directly supervising¹, which is exactly the zone hydrovac is built to work in safely. Before any of that, ground has to be located: Alberta requires 3 to 5 full working days' notice for a locate request before ground disturbance², and the coloured paint and flags that come back follow a national colour code — red for power, yellow for gas, blue for water, green for sewer³³³³ — that a hydrovac crew works around, exposing (daylighting) each marked utility by hand-safe vacuum excavation rather than digging blind with a bucket. See call before you dig for the full locate process this depends on.

STA 0+360What actually drives a hydrovac quote

Without a published rate, a hydrovac quote is built from:

• Truck size and type. A tandem-axle vac truck has a smaller tank and reach than a tri-axle unit; larger trucks cost more per hour but empty less often.
• Disposal of spoil. The water-and-soil slurry has to be trucked to a disposal facility and dumped for a fee; a job far from an approved disposal site spends more time and cost per load hauling and dumping than digging.
• Depth and soil type. Dense clay or frozen ground takes longer to break up with water than loose sand or loam, directly extending the billed hours for the same excavation volume.
• Water supply. Trucks either start full or need to refill from a hydrant or water source partway through a job, which adds non-productive time.
• Season. Winter hydrovac work needs heated water and antifreeze measures to keep the system from freezing, and frozen ground itself takes longer to break up — both add cost in cold months.
• Standby and minimum callout. As with any specialty equipment, most operators set a minimum billed period regardless of how little material actually needs to be exposed.

STA 0+480What changes the number on a small job

A single utility locate-and-expose job is not priced the same way as a full day of production hydrovacking on a larger site:

• Mobilization and travel time. Many operators bill portal-to-portal, so a site far from the truck's base adds cost before any digging starts.
• Minimum hours. A half-hour job to expose one utility crossing often still gets billed a minimum call-out, commonly two to four hours in the private market, though no official figure exists to confirm a standard.
• After-hours and emergency work. A hydrovac called out to expose a struck or suspect line outside normal hours typically carries a premium rate, again privately set.
• Number of exposures. Each separate utility crossing that needs to be daylighted adds setup time distinct from the volume of material moved.

STA 0+600Hydrovac versus mechanical excavation

Mechanical excavation averaged $11.20 per m³⁴ per cubic metre on Alberta's 2026 highway tenders — a genuine benchmark for what digging costs when a bucket can be used freely. Hydrovac costs more per cubic metre than that in virtually every private quote, because it is slower (water and vacuum move less material per hour than a bucket) and uses specialized equipment. The comparison only matters where a real choice exists: within a locate-restricted zone, near a pressurized or fragile utility, or where a client specifically wants a non-destructive method, mechanical excavation is not a lower-cost alternative, it is not an available one, and the comparison to the excavation cost guide above is informative rather than a way to negotiate the price down.

STA 0+720When hydrovac pays for itself

Even where mechanical excavation is technically allowed, hydrovac is often the more sensible choice on cost grounds, not just a regulatory requirement. A struck gas or fibre line from a mechanical excavator can cost far more in emergency repairs, service outages and potential liability than the hourly premium hydrovac carries, and the risk rises with every utility crossing a dig has to pass. On projects with dense, congested or poorly documented underground infrastructure — an older urban block, for example — hydrovac's slower pace per cubic metre is frequently offset by not having to stop and remediate a hit line partway through the job.

STA 0+840What to send for a quote

For a comparable hydrovac quote: the number and depth of utilities to be exposed, what locates have already been requested and marked, soil type if known, site access for a vac truck, the nearest approved disposal site, and the season. Confirm whether the quote is hourly, per truck-load, or a flat rate for the scope, and what the minimum billed period is.