Pilbara Surplus Water Scheme Success
Case studies
This case study outlines BHP’s Pilbara Surplus Water Scheme, a sustainable water management initiative designed to repurpose excess dewatering water and enhance regional groundwater resilience in Western Australia’s Pilbara region.
- Mining below the water table increases dewatering, producing surplus water
- By FY2025, Mining Area C abstracted ~47 ML/day, with ~19.5 ML/day surplus
- Surplus water is returned to aquifers, reducing creek discharges and improving groundwater sustainability
- Infrastructure includes dewatering bores, reinjection bores, and monitoring network
- Aligned with WAIO’s target for 50% of surplus water to be put to beneficial use by FY2030
- Supports BHP’s Water Secure 2030 vision and regulatory compliance
How this may be relevant to you
Relevant to mining industry professionals involved in water resource management and regulatory compliance.
- Demonstrates scalable solutions for managing surplus groundwater from BWT mining
- Provides a model for closed-loop dewatering and reinjection systems
- Supports sustainable mine planning and environmental stewardship
- Aligns operational water management with long-term mine expansion goals
- Offers insight into infrastructure investment and monitoring best practices
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