Maralla Road Sand Mine

The Walyunga Bullsbrook Stages site is situated within the Swan Coastal Plain transitioning into the Darling Scarp foothills, north of Perth in the South West Metropolitan Region. The terrain presents low-to-moderate relief with alluvial deposits and lateritic profiles typical of the Swan River catchment corridor. This topographic setting facilitates large-scale bulk earthworks and staged extraction benching, minimising overburden stripping ratios while enabling efficient material segregation across multiple extraction stages.

As an operating construction materials quarry, the site sustains continuous extraction cycles aligned with Perth Metro infrastructure demand. Operations are driven by:

• Diesel-intensive heavy fleet: excavators, articulated dump trucks, and front-end loaders running multi-shift rotations
• Dependence on mobile and fixed power substations for crushing and screening plant continuity
• DIDO workforce logistics routed via Great Northern Highway
• Staged extraction design enabling concurrent rehabilitation and active quarrying zones

Material processing at Walyunga Bullsbrook relies on integrated crushing and screening circuits. Key engineering components include:

• Primary jaw crushers feeding secondary cone or impact crusher stages
• Conveyor belt networks transferring crushed aggregate across processing decks, minimising haul truck dependency within the plant footprint
• Vibrating screen classifiers producing graded construction aggregates, road base, and fill materials
• Dust suppression systems and water management infrastructure for regulatory compliance

Operating within the Perth Metro growth corridor, the site faces increasing ESG compliance pressure from state planning and environmental regulators. Sustainability navigation includes:

• Progressive rehabilitation commitments under Mining Act (WA) closure planning obligations
• Potential integration of solar-assisted power to offset diesel consumption in static plant operations
• Dust, noise, and groundwater monitoring aligned with DER/DWER licence conditions
• Pathway alignment with Perth Metro's decarbonisation targets for construction supply chains