Road Construction & Final Trim
From bulk earthworks and pavement build-up through to GPS/UTS precision final trim — delivered by people who understand roads.
Dunamis delivers road construction and precision final trim grading across Western Australia — supporting Principal clients and Tier 1–3 contractors on haul roads, MRWA public roads, access roads, mine site roads, and subdivision roads. We operate as head contractor on defined road scopes or integrate directly into your project team as a specialist final trim and civil works partner.
Four Trimble GPS/UTS equipped graders. MRWA specification capable. Two-week mobilisation from contract.
Road Construction — Our Full Scope
We deliver road construction from initial clearing through to finished pavement — either as head contractor managing the full scope, or as a specialist subcontractor providing final trim, civil works, and plant to your programme. Our capability covers every stage of the road construction process.
Site Clearing & Preparation
Vegetation clearing, topsoil stripping, and site establishment ahead of earthworks — executed to minimise disruption and maximise readiness for the next phase.
Foundation Preparation
Subgrade preparation and compaction to specification — the critical base that everything above it depends on.
Embankment Construction
Cut-to-fill operations, embankment formation, and bulk material movement — delivered efficiently and to grade across all road types
Drainage & Culverts
Stormwater drainage, culvert installation, and surface water management — designed and constructed to protect pavement longevity and comply with MRWA and site-specific requirements.
Sub-grade, Sub-base & Basecourse Construction
Pavement layer construction to specification — sub-grade, sub-base, basecourse, and upper basecourse placed and compacted to achieve the required density and grade ahead of final trim and sealing.
GPS/UTS Final Trim
Precision final trim grading using Trimble GPS/UTS equipped graders — achieving MRWA standard specification of -5mm/+20mm and high-precision +/-5mm where required. Our signature service.
Asphalt, Chipseal & Bitumen Seal Coordination
We coordinate and oversee asphalt, chipseal, and two-coat bitumen seal installation — managing specialist surfacing crews as part of the broader road construction scope.
Line Marking, Kerbing & Signage
Full road finishing works including kerbing, linemarking, and sign installation — coordinated and overseen by DCG as part of complete road scope delivery.
Every road type. Every environment.
From remote Pilbara haul roads to MRWA public road upgrades and urban subdivision roads — we have the plant, people, and experience to deliver across every road construction environment in WA.
Haul Roads
Heavy-duty haul roads designed and constructed for high-traffic mining operations — gradient, drainage, and durability engineered for the loads they carry. Proven across 152km of Pilbara haul road construction for Onslow Iron.
MRWA Public Roads
Road construction and final trim to Main Roads Western Australia specification — intersection upgrades, passing lanes, and rural road construction delivered to -5mm/+20mm MRWA tolerance. Proven on Hunter Road Upgrade, Wheatbelt WA.
Access & Service Roads
Mine site access roads, service roads, and contractor access tracks — built for safe, reliable movement of people, materials, and machinery across active project sites.
Subdivision Roads
Residential and industrial subdivision road construction — earthworks, pavement build-up, and final trim ahead of sealing and line marking.
Mine Site Internal Roads
Internal processing plant and mine site roads — delivered within live operational environments with zero disruption to site operations. Proven at Kemerton Lithium Processing Plant for Albemarle Corporation.
Airstrip Roads & Hardstand
Access roads, hardstand areas, and apron grading for remote airstrip construction — high-precision GPS/UTS final trim to +/-5mm tolerance where required.
Precision final trim — where the road is won or lost
Final trim is the last earthworks operation before sealing — and it’s the most critical. By the time the grader goes on, the programme is under pressure, the sealing crew is waiting, and there’s no room for rework.
Dunamis operates four Trimble GPS/UTS equipped graders — CAT and John Deere — crewed by operators who have spent careers working final trim in civil and mining production environments. They understand tolerances, production targets, and what a Tier 1 site expects. They get it right the first time.
Standard MRWA Specification
-5mm / +20mm
Consistently achieved across public road and civil infrastructure projects throughout Western Australia.
High-Precision Specification
+/- 5mm
For projects requiring tight tolerance control — airstrips, warehouse floors and asphalt surface preparation.
Why choose us?
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Committed to quality
Western Australian sites trust us because we are committed to delivering the highest quality of service. It’s our dedication to excellence that ensures every construction project we complete is a success.
On time, on budget
We are reliable and committed, always delivering projects on time and within budget. We’re here to make sure your projects run seamlessly with the best time and cost efficiencies.
Relationships that go the distance
We build relationships that go the distance. We are your partner for all civil, mining, and construction projects. Our project management team works collaboratively to ensure the long-term success of your project.
Experts in construction
Our extensive experience across civil construction and mining applications means we bring comprehensive expertise to support your project. Our knowledgeable and skilled team can handle a variety of projects with confidence and competence.
Agile project management
We can start and facilitate projects quickly. Time is money, and that’s especially true in the civil, mining, and construction sectors. Our agile project management services can adapt to your project requirements quickly.
Outcome-focused
Our varied expertise means we can partner you with a project manager who is qualified and has the right experience to support your project for a successful outcome.
Western Australia coverage
From Perth to the Pilbara, Dunamis provides construction project management services across regional Western Australia, South Australia, and the Northern Territory.
We specialise in supporting infrastructure development in remote locations, bringing the people, equipment, and systems to deliver projects in challenging environments.
Our reach ensures we can support mining and industrial clients whether they are in Perth or in some of WA’s most remote communities.
Road Construction & Final Trim FAQs
What do construction management services include?
We deliver full road construction scope including site clearing, earthworks, drainage, pavement build-up, GPS/UTS final trim, and coordination of surfacing, line marking, kerbing, and signage. We work as head contractor on defined road scopes or as a specialist subcontractor providing final trim and civil works support to your project team.
What is GPS/UTS final trim grading
GPS and UTS are machine control systems fitted to our graders that provide real-time grade guidance to the operator. Instead of relying on string lines and level checks, the operator receives continuous feedback on blade position and grade accuracy — resulting in faster, more accurate grading with fewer passes and less rework.
What tolerance can your graders achieve?
Our GPS/UTS graders achieve standard MRWA specification of -5mm/+20mm for road pavement and civil earthworks final trim, and +/-5mm for high-precision applications including airstrips.
Can Dunamis deliver to MRWA specification
Yes — we have delivered to full MRWA specification on public road projects in Western Australia, most recently completing the Brand Highway / Hunter Road Intersection Upgrade in the Wheatbelt two weeks ahead of programme with 100% specification compliance on first inspection.
Do you work on remote road projects
Yes — we have proven delivery on remote Pilbara haul road construction including 152km of haul road for Onslow Iron. Our fleet is transport-ready for mobilisation across WA, South Australia, and the Northern Territory within two weeks of contract.
Do you offer wet hire of graders for road construction
Yes — our standard arrangement is wet hire, supplying GPS/UTS graders with experienced operators. Dry hire is available on request for clients with qualified final trim operators on their own team.
What road types do you work on
We work across haul roads, MRWA public roads, mine site access and service roads, subdivision roads, and internal processing plant roads — in both metro and remote environments across WA.
Can Dunamis act as head contractor on road construction projects
Yes — we are actively seeking road construction packages to deliver as head contractor. We have the plant, people, ISO certifications, and project management capability to take full ownership of defined road scopes. If you have a project you’d like us to price, we’d welcome the conversation.
Do you hold MRWA prequalification?
We are currently working towards MRWA prequalification. In the meantime we have successfully delivered road construction works to MRWA specification through engagement with MRWA registered contractors — including the Brand Highway / Hunter Road Intersection Upgrade for Main Roads Western Australia.
Partner with Dunamis for project success
At Dunamis Construction Group, our goal is simple: to deliver projects safely, on time, and on budget while achieving successful outcomes for every client.
Whether you’re planning a new road, a major mine site development, or a civil works project in regional WA, our project management team is ready to assist. With our extensive experience, proven track record, and commitment to excellence, we are the partner you can trust for construction management services Perth and beyond.
Talk to us today about your next construction project.
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