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Post-closure maintenance activities for various inactive copper tailings impoundments owned by BHP in Arizona (USA) require frequent erosion-related inspections and repairs. BHP assessed these recurring costs and post-closure hazards and commissioned a study of alternative methods to design a more robust, erosion-resistant solution. The study combi...
BHP is planning for closure at several legacy copper mines in Arizona (USA). A review of the original designs and the performance of the existing post-closure landforms identified long-term erosional stability of the cover systems as key to successful closure. In observing the 10 or more years of post-closure monitoring and maintenance of these cov...