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Trilogy Metals Inc. holds a 50% interest in Ambler Metals LLC, which owns the Upper Kobuk Mineral Projects in Alaska. The projects contain 46.7 million tonnes of probable mineral reserves, primarily copper, with the Arctic deposit having a pre-tax net present value of $1.5 billion.

In February 2026, the US Department of the Interior revoked land withdrawals in the Dalton Utility Corridor, allowing mining access to 2.1 million acres. This development supports infrastructure for the Ambler Access Road, crucial for transporting minerals. A $35.6 million federal investment was secured to advance project initiatives, focusing on permitting and exploration.