Hydrovac service proving, potholing and trenching from the Coffs Harbour depot, for road corridor, utility and civil work between Nambucca Heads and Grafton.
Hydro excavation loosens the ground with a pressurised water lance and lifts the slurry into a tank by vacuum, so a buried service can be uncovered without a bucket touching it. Also called hydrovac, it is the non-destructive digging method asset owners on the Mid North Coast generally expect wherever their water, sewer, power or communications assets sit close to the work.
Dynamic runs hydro excavation in Coffs Harbour from its depot in the city, covering Sawtell, Woolgoolga, Bellingen, Nambucca Heads and Grafton from that one base. A large share of the work follows the road network: proving services along and across the highway and the roads that feed it, ahead of upgrades, drainage works and new connections.
The Pacific Highway runs the length of the region, and a highway corridor gathers services. Water, sewer, power, telecommunications and drainage are bundled into reserves that were never generous, and every widening, intersection upgrade and new access road has to cross or run beside them.
Before that work is designed or built, the services in the way need proving: type, depth and alignment confirmed by eye rather than assumed from a plan. Hydro excavation gets that evidence from a small hole, without opening a trench through the reserve to go looking.
Corridor work on the Mid North Coast rarely happens with the road shut. Crews set up behind traffic control, inside the hours the road authority or principal contractor has approved, and plan each exposure so it can be opened, recorded and made safe before the window ends.
A hydrovac suits that pattern because its footprint is compact. The truck stands in one lane or on the shoulder, the hose does the reaching, and spoil goes into the tank rather than onto the carriageway. Where a programme runs over several shifts, traffic management, permits and staging are settled before the first shift, not during it.
In the older parts of Coffs Harbour and the smaller towns, the strip between kerb and boundary can be narrow, with assets from different decades lying close together. An operator can take a slot down between two services, open up the one that matters and leave the rest where they lie, which a bucket cannot do.
Ground conditions change between the coastal strip and the steeper country inland, so the realistic rate of progress is agreed at scoping rather than promised up front. If rock or heavy clay is expected, say so when you enquire so the right equipment is allocated.
Underground service locating is available through LADS, part of the Dynamic Group, so a corridor can be located and then exposed without two suppliers trying to share one traffic control setup.
Ozzie Skip Hire, also part of the Dynamic Group, operates skip bin services out of Coffs Harbour. Where a job produces general waste alongside excavation spoil, bins can be arranged through the same point of contact, and excavators and tip trucks with operators are available where bulk work follows the exposure.
Service proving on highway and local road corridors under approved traffic management.
Exposing water, sewer, electrical and telecommunications assets across Coffs Harbour and the surrounding towns.
Uncovering conduit and cable before new network works cross existing routes.
Design and construction-stage potholing on civil packages along the corridor.
Proving services ahead of council road, drainage and streetscape works.
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 tankers, including a 16,000-litre capability, for large-volume material recovery on major projects.
Supplied for: Hydro Tankers, Vacuum Loading
Excavators supplied with experienced operators for civil earthworks and site preparation.
Supplied for: Excavator Hire
Safety on site
Most corridor work is done with the road open, behind traffic control and inside the hours the road authority or principal contractor approves. Share the location, the approved window and who holds the traffic management when you enquire so the unit and crew are planned around it.
Coffs Harbour, Sawtell, Woolgoolga, Bellingen, Nambucca Heads and Grafton, all from the Coffs Harbour depot rather than a base in each town. Where several sites along the corridor can be done in one mobilisation, it is worth sending them together.
Ozzie Skip Hire, part of the Dynamic Group, operates skip bin services out of Coffs Harbour, so bins can be arranged through the same contact as the hydro excavation. Mention it at enquiry along with the type of waste expected.
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 Sunshine Coast, Hydro Excavation Newcastle, Hydro Excavation Wollongong, Hydro Excavation Townsville, Hydro Excavation Cairns, Hydro Excavation Tweed Heads
Project evidence
No Coffs Harbour 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.
On a civil site the excavation method is a programme decision as much as a safety one. Hydro excavation is specified because it narrows the range of things that can go wrong at the point where a project is most exposed.
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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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The company began on the Gold Coast in 2003 with two operators, two vacuum excavation trucks and a shed. It now runs depots from Wollongong through to Cairns, with more than 200 assets across the wider Dynamic Group.
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Read ArticleTell us about the site and the work and the Coffs Harbour team will respond. For urgent works, call 1300 822 878.
What to send us for an accurate hydro excavation quoteStep 1 of 6: Service
