Hydrovac potholing and service proving across the Sunshine Coast, from coastal sand at Kawana and Caloundra to heavier ground in the hinterland.
Hydro excavation uses a pressurised water lance to break the ground and a vacuum to draw the slurry into the truck’s tank, so a live service can be uncovered without a bucket or hand tool touching it. That is why it is the usual form of non-destructive digging on the Sunshine Coast wherever a water main, sewer, gas line, power cable or fibre route has to be exposed.
Hydrovac units work out of the Warana base for civil contractors, utilities, councils and builders. The bulk of the work is potholing and service proving before design or construction, with precision trenching and excavation around existing pits and footings making up the rest.
The region’s growth means much of the proving work happens on services that went in months ago rather than decades ago. On a new estate the question is whether as-constructed depth and alignment match the design, and the answer matters before the next trade trenches, bores or pours beside them.
The established coastal suburbs and older sections of the highway corridor ask the opposite question. There the assets are older and the records less certain, so each pothole is about finding out what is actually present, including anything the plans do not show. Both jobs use the same truck but are scoped and sequenced differently, so tell us which one you have.
Around Kawana, Maroochydore and Caloundra, excavations are cut in sand with groundwater often not far below. Water cuts that ground easily. The difficulty is that the sides of an open hole will not stand, and once the water table is reached the pothole starts filling from below.
Crews respond by keeping each exposure small, lifting spoil as it is cut rather than letting it build up at the edge, and completing the asset check and reinstatement in one continuous run. Where a lot of wet spoil is expected, extra tank capacity is planned in so the unit is not repeatedly stopping to tip.
Inland towards Nambour and Beerwah, the material is heavier and holds its shape far better, but progress depends on how the ground responds to the jet. Firm or cohesive soil takes longer to break down than coastal sand, and a realistic rate can only be given once the site has been seen or properly described.
If rock, heavily compacted fill or old road base is expected, raise it at enquiry so the scope and water supply are set to suit. Planning shift length around known ground is far easier than discovering it at the first pothole.
New estates depend on water, sewer, power and telecommunications trunk mains, and the road upgrades that follow often cross those mains or run beside them. Proving a trunk asset before a crossing is designed or a bore is launched matters more than most potholing, because a strike on a main that feeds a growing area affects far more than the site where it happens.
Plans come first through Before You Dig Australia, and underground service locating is available through LADS, part of the Dynamic Group, so the locate and the exposure can be booked together. Hydro excavation then confirms, with the asset in view, what the locate has marked.
Service proving on subdivision and civil packages across the coastal and southern growth areas.
Exposing water and sewer trunk mains ahead of connections, crossings and upgrades.
Proving electrical, gas and telecommunications assets before new works cross them.
Potholing ahead of road upgrades along the highway corridor, within traffic management.
Capital works and streetscape projects in the established coastal suburbs.
Clearing pile, footing and connection positions on building sites.
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
High-capacity 10x4 units for larger volumes and sustained excavation and recovery programmes on major projects.
Supplied for: Hydro Excavation, Vacuum Excavation, Hydro Tankers
High-capacity tankers, including a 16,000-litre capability, for large-volume material recovery on major projects.
Supplied for: Hydro Tankers, Vacuum Loading
Safety on site
Because what was built does not always sit exactly where it was designed. The next trade needs the real depth and position before digging or boring beside it, and a short potholing visit costs far less than repairing a new main.
No, but it changes how the job is run. Once a pothole reaches the water table it takes on water, so exposures are kept tight, spoil is lifted as it is cut and enough tank capacity is allowed for the extra liquid. Mention known groundwater when you enquire.
Yes. LADS, part of the Dynamic Group, provides underground service locating, so locating and hydro excavation on Sunshine Coast sites can be booked together and sequenced as one job.
Operated vac trucks for estate, drainage and civil work, with tipper support from Warana.
Stormwater camera surveys for maintenance priorities, estate handover and construction records.
Jetting and vacuum recovery for pipes, pits, gullies and culverts, before storm season and after.
Underground utility locating delivered by LADS, part of the Dynamic Group.
Industrial vacuum excavation for safe, efficient exposure and removal of material.
Excavators with experienced operators for civil earthworks and site preparation.
Tip trucks for spoil cartage and material transport on civil projects.
Hydro Excavation in other regions: Hydro Excavation Brisbane, Hydro Excavation Gold Coast, Hydro Excavation Sydney, Hydro Excavation Newcastle, Hydro Excavation Wollongong, Hydro Excavation Townsville, Hydro Excavation Cairns, Hydro Excavation Coffs Harbour, Hydro Excavation Tweed Heads
Project evidence
No Sunshine Coast 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.
Non-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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Read ArticleHydro 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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LADS, Locate & Detection Specialists, joined the Dynamic Group in 2026. It brings CERTLOC accredited underground service locating and ground penetrating radar in house, alongside the excavation and inspection fleet.
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Read ArticleTell us about the site and the work and the Sunshine Coast team will respond. For urgent works, call 1300 822 878.
What to send us for an accurate hydro excavation quoteStep 1 of 6: Service