May 28, 2026 — The U.S. agency responsible for overseeing deep-sea mining in federal waters is preparing to auction off seabed blocks within months — a step that could kick-start commercial-scale deep-sea mining and make the U.S. one of the first countries to allow it.
Deep-sea mining has not yet begun anywhere in the world. Opponents say it could cause widespread and irreversible damage to the marine environment if it begins, while supporters say it could provide an important source of critical minerals.
In a budgetary document released in April 2026, the U.S. Department of the Interior (DOI) indicated it intends to hold at least three offshore lease sales during the 2026 and 2027 fiscal years. The lease sales will take place through competitive auctions, providing a pathway for winning companies to gain exclusive rights to explore and exploit minerals in designated tracts of seabed.
The first sale is slated for the federal waters of American Samoa in August 2026; a second in the Commonwealth of the Northern Mariana Islands (CNMI) in November 2026; and a third in Alaska in 2027. A spokesperson for the Bureau of Ocean Energy Management (BOEM), the U.S. agency currently responsible for the development of offshore energy and mineral resources on the U.S. outer continental shelf (OCS), confirmed this timeline.