Cockatoo Island
Operation Details
Compliance & B2B Logistics
Access Logistics & DIDO
Project Logistics & B2B Overview
Geographic Location and Topography
Cockatoo Island is situated in Yampi Sound, West Kimberley, Western Australia, approximately 130 km northwest of Derby. The island presents a rugged, laterite-capped plateau terrain with steep coastal cliffs, severely constraining heavy equipment mobilisation and mass earthmoving operations. The tidal regime in Yampi Sound — among the highest in Australia — dictates strict marine logistics windows. All bulk ore stockpiling and vessel loading must account for tidal amplitude, directly impacting operational scheduling and throughput continuity.
B2B Operational Cycle and Energy Dependency
As an island-based operation with zero grid connectivity, Cockatoo Island Stage relies entirely on diesel gensets for 24/7 power supply, driving crushing, conveying, and camp infrastructure loads. Fuel logistics via marine barge represent a critical supply chain vulnerability and a dominant OPEX driver. Key B2B operational dependencies include:
- Diesel fuel resupply via scheduled barge from Broome or Derby
- Mobile crushing and screening plant power draw
- Camp and communications infrastructure load
- Marine loading equipment and conveyor systems
Extraction Engineering and Processing Infrastructure
The Cockatoo Island Stage operation produces Direct Shipping Ore (DSO), bypassing conventional beneficiation circuits. Primary processing involves:
- Run-of-mine crushing to export-grade lump and fines specification
- Dry screening — no flotation or wet processing circuit required
- Conveyor-to-barge loading system for bulk vessel export
- Grade control via blast pattern and selective mining
The absence of a primary grinding mill or flotation plant reduces capital intensity but elevates dependence on ore grade consistency and selective dig-unit precision.
ESG, Value Chain and Sustainability
Island isolation creates acute ESG exposure, particularly around diesel decarbonisation and marine environmental compliance in a sensitive Kimberley coastal ecosystem. Current and prospective ESG vectors include:
- Potential hybrid solar-diesel microgrid integration to reduce Scope 1 emissions
- Marine spill prevention protocols under WA DER and Commonwealth EPBC Act obligations
- Indigenous heritage management under Dambimangari and Wunambal Gaambera country obligations
- Pearl Gull Iron's ASX-listed status introduces ESG disclosure pressure aligned with investor expectations