In 2024 Hanroy awarded Decmil a contract to upgrade Sections 3A and 3B of the Marble Bar Road to support new mine development operations. Upon successful delivery of this contract, Decmil was awarded another contract in 2025 for construction of Sections 5 and 2B.
The Marble Bar Road is a state public asset and is approximately 100km in length. The road supports HanRoy’s McPhee Creek Iron Ore Project, located in the northeast Pilbara region of WA, approximately 100km north of the Roy Hill Mine and 30km north of Nullagine. Primary crushed ore will be hauled by Hanroy along Marble Bar Rd from McPhee Creek to Roy Hill for processing and transport to the port. This new mine development will deliver up to 10 Mtpa of primary crushed ore to the Roy Hill Mine site for processing over a planned mine life of 15 years.
Upgrading the existing Marble Bar Road is therefore a key infrastructure component of this development, and the upgrade is required to enable RAV 10 haulage trucks to be used to haul the ore between McPhee and Roy Hill.
The project is located approximately 50km north of Roy Hill in the north-east Pilbara region of Western Australia. Decmil’s scope of works involves construction of the following sealed roads in accordance with Main Roads Western Australian standards.:
Section3: Upgrade existing 22.95km Marble Bar Road
Section 2B: Upgrade existing 17.13km Marble Bar Road
Section 5: Upgrade existing 29.09km Marble Bar Road
Decmil’s scope of works include:
- Site Preparation and Earthworks – vegetation clearing and topsoil removal, civil and earthworks including rock excavation, along with the haulage of pavement materials.
- Road Construction and Pavement Works – Construction of sealed road, intersection and embankments. This encompasses road pavement and surfacing activities, stabilised pavement construction, parking bays and driveways.
- Temporary Works and Traffic Management – design, construction, maintenance and rehabilitation of temporary bypass roads within the approved clearing footprint to maintain traffic flow during construction phases. Active and comprehensive traffic management systems will be implemented throughout the various construction phases while ensuring continuous public access along the existing Marble Bar Road.
- Drainage and Water Management Infrastructure – Comprehensive drainage systems will be installed including polyethylene coated corrugated steel pipes and reinforced concrete pipes. Surface drainage infrastructure encompasses the construction of surface drains, levees and associated surface treatments. Both temporary and permanent erosion and sediment control devices will be constructed, incorporating scour protection measures to ensure long-term stability and environmental compliance.
- Safety, Access and Finishing Works – Installation of pastoral fencing and stock grids along with associated enabling works. Road line marking, guideposts, safety barriers and signage installation. Lighting infrastructure involves the installation of lighting poles with associated electrical circuitry, control systems and integration works to ensure proper illumination and safety standards.
