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    TMC seabed mining plan backed by NOAA: permitting and EIS lens for engineers

    May 1, 2026|

    Reviewed by Tom Sullivan

    TMC seabed mining plan backed by NOAA: permitting and EIS lens for engineers

    First reported on MINING.com

    30 Second Briefing

    TMC’s deep-seabed mining plan in the Clarion Clipperton Zone advanced after NOAA ruled its consolidated application fully compliant, covering about 65,000 km² and an estimated 619 million tonnes of wet polymetallic nodules at depths beyond 4,000 metres. The ruling moves the project into certification, with publication in the Federal Register, a draft Environmental Impact Statement and a potential final permit decision by early 2027 under NOAA’s revised single-step framework combining exploration and commercial recovery approvals. TMC shares rose over 7% to $5.62, valuing the company at roughly $2.3 billion.

    Technical Brief

    • NOAA’s compliance ruling follows TMC submitting 2013–2022 exploration datasets to the ISA’s DeepData platform.
    • Exploration covered the eastern Clarion Clipperton Zone between Mexico and Hawaii, targeting depths >4,000 m.
    • Data package includes biological and geochemical sampling from ocean surface waters down to abyssal seafloor.
    • Consolidated application area increased from ~25,000 km² (2025 filing) to ~65,000 km² under the new submission.
    • NOAA’s revised Deep Seabed Hard Mineral Resources Act rules merge exploration licences and recovery permits into one process.

    Our Take

    With TMC’s market capitalisation now around $2.3 billion and a 2025 net loss of $319.8 million reported in March, NOAA’s backing reduces permitting risk but leaves the business model still highly geared to future offtake execution and metal price support across copper, nickel and other battery‑relevant commodities.

    The launch of The Metals Royalty Company’s Nasdaq‑listed royalty exposure to TMC’s Pacific polymetallic nodules, covered on 8 April 2026, shows that financial markets are already structuring indirect plays on Clarion‑Clipperton Zone assets, which could influence how future offtake and project finance is priced for these critical metals streams.

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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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