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    BHP–Rio Tinto tailings consortium: dewatering design notes for mine engineers

    May 12, 2026|

    Reviewed by Tom Sullivan

    First reported on International Mining – News

    30 Second Briefing

    BHP and Rio Tinto have formed a Tailings Management Consortium (TMC) and issued joint guidance focused on improving tailings dewatering and storage facility management. The collaboration targets higher degrees of dewatering to move operations away from conventional slurry dams towards safer, lower‑footprint options such as thickened, filtered or dry‑stacked tailings, in line with emerging global standards. Both miners state they will share operational learnings and design practices across industry, signalling more open benchmarking of tailings performance and risk controls.

    Technical Brief

    • Guidance is expected to influence design criteria for new tailings storage facilities and brownfield retrofits.
    • Consortium model creates a common reference for consultants and OEMs engaged in tailings dewatering projects.
    • For other miners, the move signals tighter benchmarking of tailings risk controls and disclosure expectations.

    Our Take

    BHP and Rio Tinto’s work through the Tailings Management Consortium sits alongside their recent joint research on large‑scale filtered tailings, signalling that both majors are now testing higher‑cost filtration and stacking options that could become de facto benchmarks for large iron ore and copper operations.

    The renewed focus on tailings practice for BHP comes as it continues to face legal exposure over the 2015 Fundão dam failure, so any standards emerging from this collaboration are likely to be shaped with cross‑jurisdictional liability and disclosure requirements firmly in mind.

    In our database of 1,186 mining stories, relatively few safety‑tagged pieces involve two Tier‑1 miners like BHP and Rio Tinto working together, which suggests that outcomes from this consortium may carry unusual weight with regulators and mid‑tier operators looking for defensible tailings governance models.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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