Trilogy Metals' Arctic Project Enters Federal Environmental Review, Setting Stage for 2028 Permitting Decision

Trilogy Metals Inc. (NYSE American: TMQ) (TSX: TMQ) has announced that the U.S. Army Corps of Engineers (USACE) has published a Notice of Intent (NOI) to prepare an Environmental Impact Statement (EIS) for the company's Arctic Project in Alaska's Ambler Mining District. This publication formally initiates environmental review under the National Environmental Policy Act (NEPA) and launches the public scoping phase, representing the first key federal milestone under the coordinated federal and state permitting schedule published in July 2026.

The Arctic Project is a high-grade copper-zinc-lead-gold-silver deposit being advanced by Ambler Metals LLC, a 50/50 joint venture between Trilogy Metals and South32 Limited (ASX: S32; LSE: S32; JSE: S32; ADR: SOUHY). The project is located within the Upper Kobuk Mineral Projects (UKMP) in northwestern Alaska, an area recognized as one of the richest and most prospective copper-dominant districts in the world. The UKMP hosts polymetallic volcanogenic massive sulfide (VMS) deposits and carbonate replacement deposits, with exploration focused on the Arctic VMS deposit and the Bornite carbonate replacement deposit. Both deposits lie within a land package spanning approximately 190,929 hectares.

The initiation of the federal environmental review is significant because it sets in motion a defined permitting timeline that could lead to construction and operation of a major North American copper mine. Under the approximately 29-month review timetable, the schedule targets publication of a draft EIS in October 2027 and a Record of Decision in September 2028, with remaining federal and state authorizations targeted for overall completion in November 2028. This timeline provides investors and stakeholders with greater certainty regarding the project's path toward potential development.

The Arctic Project's importance extends beyond its mineral wealth. Copper is a critical component in the global transition to renewable energy, electric vehicles, and modern infrastructure. Developing a domestic source of high-grade copper in the United States could reduce reliance on foreign supply chains and support national security interests. The Ambler Mining District's potential to become a premier North American copper producer aligns with broader efforts to secure critical minerals.

Furthermore, the project has established a framework for cooperation with local communities. Ambler Metals has an agreement with NANA Regional Corporation, Inc., an Alaska Native Corporation, which provides a structure for exploration and potential development in cooperation with local communities. Trilogy Metals has stated that its vision is to develop the Ambler Mining District while protecting and respecting subsistence livelihoods, a commitment that will be tested during the environmental review process as public scoping invites input from stakeholders.

The NOI and the subsequent EIS process will involve comprehensive analysis of potential environmental impacts, including effects on water resources, wildlife, and cultural resources. Public scoping is a critical phase where federal agencies solicit comments from the public, tribes, and other interested parties to define the scope of the EIS. This participatory process ensures that a wide range of perspectives are considered before any permitting decisions are made.

For Trilogy Metals, the initiation of the federal review represents a major de-risking event. The company's shares trade on the NYSE American and the Toronto Stock Exchange under the symbol TMQ. The latest news and updates relating to TMQ are available in the company's newsroom at https://ibn.fm/TMQ. The full press release can be viewed at https://ibn.fm/MEChn. As the environmental review progresses, the Arctic Project will remain a focal point for investors monitoring the development of critical mineral resources in the United States.