SRK was contracted by Lundin Mining in 2024 to review the conceptual closure plan for the Chapada Mine in Goiás.
The multidisciplinary assessment focused on risk management, uncertainties, and opportunities to ensure sustainable closure while mitigating liabilities. The review adhered to Lundin’s data, international best practices, and Brazilian regulations.
Key aspects included redefining closure concepts, proposing socio-environmentally responsible alternatives, and prioritizing risk minimization. The plan involves partial backfilling of the pit, the creation of a pit lake, decommissioning of structures, the remediating of waste rock piles, and implementing of drainage and safety measures.
A risk analysis identified residual risks and future land-use options, highlighting gaps in geochemistry, water management, and geotechnics.
Closure cost estimates, including asset retirement obligation costs, were developed, and additional studies were proposed to refine these estimates and ensure financial sustainability.
By SRK Brazil
