CDM Smith was engaged by a gold mining client to conduct a companywide review of all current Mine Closure Plans (MCPs) across its Western Australian operations. The objective was to assess compliance, structure, and consistency with the 2024 Draft Guidelines for Preparing Mine Closure Plans. CDM Smith designed and applied a Multi-Criteria Analysis (MCA) framework and scoring system to evaluate each plan and identify improvement opportunities. The review covered several Environmental Group Sites and incorporated benchmarking against five other mining operations to capture industry best practices. Outcomes included a comprehensive Summary of Results report detailing key findings, as well as recommendations for updates and refinements. CDM Smith also developed standardised completion criteria, performance indicators, and rehabilitation monitoring methodologies to drive consistency and enable robust progress tracking. The project demonstrates CDM Smith’s capability in strategic closure planning, quantitative assessment, and regulatory alignment across complex, multi-site portfolios.