Hydrovac potholing, service proving and careful excavation around drainage, tree roots and live services for civil, utility, council and commercial construction work in the Far North.
Hydro excavation cuts the ground with a controlled water jet and vacuums the slurry away, exposing a service without a bucket or bar coming near it. In Cairns and the surrounding Far North it is the usual non-destructive digging method for finding and proving water, sewer, power and communications assets before new work starts.
Cairns is the northern end of the Dynamic network. Crews based there cover the city and Smithfield, south to Gordonvale and Innisfail, north to Port Douglas and inland to Mareeba, working for civil contractors, utilities, telecommunications providers, councils and builders on tourism and commercial projects.
High rainfall shapes hydro excavation in the Far North as much as it shapes drainage. After heavy rain the ground is already carrying water before the lance adds any, and a pothole can take on seepage and run-off as it goes down. The vacuum lifts that water with the soil, so the tank fills faster than the size of the hole would suggest.
Crews plan for it by keeping excavations tight, managing water use in soft or saturated ground and allowing for more trips to disposal on wet days. If a site is low-lying or has recently flooded, say so at enquiry so the unit and the day’s programme are set with that in mind.
Vegetation grows quickly in a wet tropical climate, and root intrusion is a persistent issue in Far North drainage rather than an occasional one. The same roots wrap around conduits and pipes in verges and footpaths, which is exactly where mechanical excavation tends to do its damage.
Hydro excavation lets an operator work through a root mass at controlled pressure and see the asset before reaching it. Where a tree or root zone has to be preserved, the approach to the excavation is agreed with the site, including any tree protection conditions, before work starts.
Construction across the city, Smithfield and Port Douglas often happens on established ground: a new commercial building beside existing pavement, works at hospitality and tourism sites that keep trading, or a road and streetscape upgrade in a working precinct. Services are proved before piling, footings and connections, often with the public only metres away.
That puts weight on a tidy setup. Spoil goes into the tank rather than onto the ground, pedestrian and traffic controls are arranged around the truck, and potholes can be reinstated or plated at the end of a shift so the site is left safe and presentable.
In the Far North, hydro excavation often follows a CCTV inspection. The camera shows where a stormwater or sewer line is cracked, displaced or root-bound, and hydro excavation then opens the ground at that point to expose the pipe without damaging it or the services crossing above it.
Underground service locating through LADS, part of the Dynamic Group, can set the site out first, and drain cleaning and CCTV crews work from the same region. One sequence can then cover locating, inspection and exposure instead of coordinating separate suppliers.
Proving services before footings and connections on tourism, hospitality and commercial sites.
Exposing water, sewer, power and communications assets for maintenance and connections.
Uncovering conduit in root-bound verges before new network work crosses it.
Service proving ahead of council capital works and drainage renewals.
Opening the ground at defects identified by CCTV on stormwater and sewer lines.
The core of the fleet. Truck-mounted vacuum units for hydro excavation, service exposure and material recovery.
Supplied for: Hydro Excavation, Vacuum Excavation, Vacuum Loading
Drain-camera inspection units for pipe-condition assessment and defect identification.
Supplied for: CCTV Pipe Inspections, Drain Cleaning & Jetting
Off-road capable units, including 4x4 CCTV capability, for remote and difficult-access worksites.
Supplied for: CCTV Pipe Inspections, Underground Locating (LADS), Emergency Response
Safety on site
Usually, although wet ground changes the day. Saturated soil and water in the excavation add to the volume the truck has to lift, so progress and disposal trips are planned around the conditions. Sites that are flooded or unsafe to reach are rescheduled.
The city and Smithfield, Gordonvale, Innisfail, Port Douglas and Mareeba. Those areas are covered from the Cairns base rather than a depot in each town, and availability for a particular date is confirmed when you enquire.
Yes. Share the inspection footage or report and the position of the defect, and the excavation is set out at that point. Locating can be arranged first so crossing services are marked before the ground is opened.
Underground utility locating delivered by LADS, part of the Dynamic Group.
Drain-camera inspection and pipe-condition assessment for planning and asset management.
High-pressure jetting and combination units for blocked and dirty pipe networks.
Industrial vacuum excavation for safe, efficient exposure and removal of material.
Hydro Excavation in other regions: Hydro Excavation Brisbane, Hydro Excavation Gold Coast, Hydro Excavation Sydney, Hydro Excavation Sunshine Coast, Hydro Excavation Newcastle, Hydro Excavation Wollongong, Hydro Excavation Townsville, Hydro Excavation Coffs Harbour, Hydro Excavation Tweed Heads
Project evidence
No Cairns case study for this service has been published yet. These show the same service delivered in other regions.
Related insights
Written by the people who run this work, on how jobs are planned and what changes on site.
Hydro excavation combines a high-pressure water jet with high-volume suction to remove soil without a mechanical cutting edge. It is the standard method for exposing live underground services and for digging where a machine bucket cannot be used safely.
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Read ArticleNon-destructive digging removes the mechanical cutting edge from the excavation, which is what makes it suitable for work around live services. It helps reduce the risk of a service strike, but only as part of a sequence that starts well before a truck arrives.
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A camera in a pipe replaces guesswork with a record. CCTV inspection reports the location, depth, length and type of a drainage asset along with the faults inside it, which is what makes a maintenance or repair decision defensible.
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Read ArticleTell us about the site and the work and the Cairns team will respond. For urgent works, call 1300 822 878.
What to send us for an accurate hydro excavation quoteStep 1 of 6: Service