Trilogy Metals posts Arctic project permitting schedule targeting September 2028 US decision
TMQ•Key milestones and project structure
Key milestones include a Notice of Intent for an Environmental Impact Statement in September 2026 and a draft EIS in October 2027.
The project is advanced by Ambler Metals, a 50/50 joint venture between Trilogy and South32.
Permitting schedule targets September 2028 decision
Trilogy Metals published a coordinated federal-state permitting schedule for its Arctic mining project in Alaska’s Ambler district, targeting a NEPA Record of Decision in September 2028.
The U.S. Army Corps of Engineers was confirmed as the lead federal agency, tied to Ambler Metals’ Clean Water Act Section 404 permit application filed April 20, 2026.
The FAST-41 schedule targets a roughly 29-month timeline from the Section 404 filing to the Record of Decision; overall permitting completion is targeted for November 2028.
