Myalup Limestone

Finn Myalup is situated on Finn Road, Myalup, within the Shire of Harvey, South West Western Australia — Lots 1498, 1504, and 1794. The terrain is characterised by low-lying coastal plain with dense native Tuart and Banksia vegetation, demanding rigorous pre-clearance environmental assessments. Proximity to the Myalup-Wellington Dieback Management Zone mandates strict Phytophthora cinnamomi (Dieback) hygiene protocols for all plant, equipment, and personnel entering the operational footprint.

The operation functions as an active open-cut quarry under Operating status, extracting limestone and limesand for regional construction, agricultural lime, and civil infrastructure markets. Operational continuity relies on:

• Diesel-intensive mobile fleet — excavators, front-end loaders, and articulated haul trucks burning continuous fuel cycles
• Dependence on regional power infrastructure tied to Western Power's South West Interconnected System (SWIS)
• DIDO workforce rotations sourced from Harvey, Bunbury, and Mandurah corridors
• Haul road maintenance on Finn Road as a critical B2B logistics bottleneck

Limestone and limesand quarrying at Finn Myalup involves a primary crushing and screening circuit calibrated for carbonate-rich sedimentary material. Key engineering parameters include:

• Jaw or impact primary crusher sizing for variable limestone hardness (UCS typically 10–40 MPa)
• Wet or dry screening plants for limesand grading to specification
• Dust suppression systems — critical given fine carbonate particulate generation
• Geotechnical batter slope management in shallow unconsolidated coastal sediment profiles
• No flotation circuit applicable — product separation achieved via mechanical screening

Operating within the South West's sensitive ecological corridor, Finn Myalup is subject to stringent progressive rehabilitation obligations under WA DMIRS and EPA frameworks. ESG compliance priorities include:

• Void rehabilitation — progressive backfill, topsoil reinstatement, and native revegetation post-extraction
• Dieback hygiene stations at all site access points — mandatory wash-down protocols
• Stormwater and sediment runoff management to protect adjacent wetland buffers
• No tailings facility required — waste material managed as overburden stockpile
• Dust and noise monitoring aligned with Shire of Harvey development conditions