Capability statement · Version 1 · Last reviewed 20 October 2026
Bulk earthworks, roads and drainage delivered to program for developers and councils
Tarnwick Civil & Earthworks delivers bulk earthworks, roads, drainage and subdivision works across South East Queensland with its own fleet, survey team and supervisors.
Who we work with
- Residential subdivision developers
- Industrial estate developers
- Local councils: road and drainage upgrades
- Head contractors needing an earthworks partner
Tarnwick Civil & Earthworks builds the ground that developments stand on. We deliver bulk earthworks, roads, stormwater drainage and subdivision works for developers, councils and head contractors across South East Queensland, with our own fleet, our own survey team and supervisors who stay with a project from first cut to handover, so programs are kept and quality is checked at every stage.
- Our own fleet and survey team. We own the excavators, dozers, graders and trucks we run, and our surveyors set out and check every lot, road and pipe line.
- One supervisor from start to handover. Each project keeps one supervisor from the first cut to handover, so the client has one person who knows the site and its program.
Leadership: Tarnwick is led by its founding director, a civil engineer, with a construction manager and a survey manager who run the projects day to day.
The ground is right before anything is built on it.
Earthworks set the program for everything that follows. Developers and councils choose Tarnwick because we own our fleet, survey our own work, keep one supervisor on each project and plan for the weather, so the site is ready when the next trades arrive.
- Our own fleet, ready to mobilise. We own the machines we run and maintain them in our own workshop, so we mobilise when the project needs us rather than when hire equipment is free.
- Survey checks at every stage. Our surveyors set out each stage and check levels before the next one starts, so errors are found early and the work passes inspection the first time.
- One supervisor for the whole job. The same supervisor runs the site from the first cut to handover and reports to the client each week on progress, weather and any changes.
- Programs planned around the weather. We plan the wet season into the program, stage the works to keep water off finished areas, and set up erosion controls before the first storm.
Own fleet, own survey, one supervisor: the site is ready when you need it.
Three core services take a site from raw ground to finished roads and lots. Each is delivered by our own crews and fleet, with survey checks built into every stage.
Bulk earthworks
Cut, fill and compaction for subdivisions, estates and building pads, to the geotechnical engineer's specification.
- Scope
- Site strip and topsoil
- Cut and fill
- Compaction and testing
- Building pads
- Where
- Subdivisions and industrial estates.
- Specialist capability
- Machine guidance on dozers and graders.
- Why clients use us
- Machine guidance and our own survey checks keep levels right first time, so less material is moved twice.
Roads and pavements
Subdivision roads, council road upgrades and pavements, from subgrade preparation to sealed surface.
- Scope
- Subgrade preparation
- Pavement layers
- Kerb and channel
- Sealing coordination
- Where
- Subdivision and council roads.
- Specialist capability
- Pavement testing with our own lab partner.
- Why clients use us
- Pavements are tested layer by layer before the next goes down, so roads pass council inspection at handover.
Stormwater and drainage
Stormwater pipes, culverts, detention basins and erosion controls for subdivisions and council upgrades.
- Scope
- Stormwater pipes and pits
- Culverts
- Detention basins
- Erosion and sediment control
- Where
- Subdivisions and road corridors.
- Specialist capability
- Deep trenching with shoring systems.
- Why clients use us
- Drainage goes in ahead of the wet season, so finished areas stay dry and the program holds.
Owning our fleet lets us mobilise when a project is ready, not when hire machines are free. Every machine is serviced in our workshop and fitted for the work we do.
| Category | Items |
|---|---|
| Plant and machinery |
|
| Vehicles |
|
| Workshop |
|
| Specialist tools and technology |
|
Maintenance: Every machine has a daily pre-start check and a service schedule kept in our workshop, with records available to clients on request.
Our work spans the residential, industrial and public projects that shape South East Queensland's growth, from new suburbs to council road upgrades.
| Environment | What we deliver | The challenge | Why we fit |
|---|---|---|---|
Residential subdivisions | Bulk earthworks, roads, drainage and lot works for new estates. | Staged releases, tight programs and neighbours. | We stage works to match lot releases and keep dust and traffic under control. |
Industrial estates | Building pads, heavy duty pavements and drainage for estates. | Large pads to tight level tolerances. | Machine guidance and survey checks keep pads within tolerance. |
Council roads | Road upgrades, intersections and drainage for local councils. | Live traffic, services and public safety. | Traffic management, services locating and staged works keep roads open. |
Rural infrastructure | Rural road upgrades, culverts and creek crossings. | Remote access, flooding and environmental approvals. | We plan around flood seasons and work to each approval's conditions. |
Every environment gets the same survey checks and supervision.
- Safety. Our safety management system is certified to ISO 45001. Every site has a site-specific safety plan, daily prestarts, traffic management between plant and people, and permits for excavation near services.
- Quality. Our quality management system is certified to ISO 9001. Each stage has an inspection and test plan, survey conformance checks and compaction testing, and the client receives a complete handover pack.
- Environment. Our environmental management system is certified to ISO 14001. Erosion and sediment controls go in before the first cut and are inspected after every storm.
| Certification | What it means |
|---|---|
| ISO 45001 | Safety management |
| ISO 9001 | Quality management |
| ISO 14001 | Environmental management |
| Traffic management accreditation | Accredited to plan and run traffic control |
How to engage us: Direct engagement by developers · Council tender and quotation · Subcontract to head contractors
| Project | Client | Scope |
|---|---|---|
Hillcrest Rise subdivision, stages 1 to 3. | residential developer | 240 lots. Bulk earthworks, roads and drainage. |
Northgate industrial estate pads. | industrial developer | Six building pads. Heavy duty pavements. |
Creek Road upgrade. | local council | 1.8 km road upgrade. Culvert replacement. |
Riverbend detention basin. | head contractor | Basin and outlet works. Erosion controls. |
Case study: Hillcrest Rise subdivision, stages 1 to 3
Client: residential developer. Scope: bulk earthworks, roads and drainage for 240 lots.
- Challenge
- Three stages had to be released on a fixed sales program, through the wettest summer in several years, on ground that held water.
- Solution
- We installed the trunk drainage first, staged the earthworks so finished lots shed water, and used machine guidance and daily survey checks so no area had to be reworked after rain.
- Outcome
- All three stages were released on program, the lots passed council inspection first time, and the developer engaged Tarnwick for stage 4.
"Through a very wet summer, Tarnwick kept every stage moving and handed over lots that passed first time."
Case study: Creek Road upgrade
Client: local council. Scope: 1.8 km road upgrade and culvert replacement.
- Challenge
- The road was the only access for nearby farms, so it had to stay open throughout, and the old culvert sat in a creek that floods quickly.
- Solution
- We built a side track for traffic, replaced the culvert in a dry window between forecast rains, and staged the pavement works in short sections under traffic control.
- Outcome
- The road stayed open for the whole project and was handed over ahead of the wet season.
"The road never closed, and residents hardly noticed the works."
Send us your plans and we will price the earthworks and program.
Phone: 0491 570 158Email: projects@tarnwick.example.comWeb: tarnwick.example.comService area: South East QueenslandISO 9001, ISO 14001 and ISO 45001 certified