PUBLIC NOTICE Notice of Proposed Issuance of an Alaska Pollutant Discharge Elimination System (APDES) Individual Permit to Discharge to Waters of the United States The Alaska Department of Environmental Conservation (DEC) has tentatively determined to reissue a discharge permit for the activity described below. Permit Nbr and Name: AK0038652 – Red Dog Mine Applicant: Teck Alaska, Inc.; Red Dog Mine; 82 miles northeast of Kotzebue, Alaska; 2525 C Street, Suite 310; Anchorage, AK 99503 Facility Activity: The Red Dog Mine is open pit mine yielding ore rich in lead and zinc. APDES permit AK0038652 authorizes discharge of treated mine drainage to the Middle Fork of Red Dog Creek. Regardless of mine operations, precipitation falling on the facility must be captured, treated, and discharged to ensure the tailings storage facility dams do not overtop and protect downstream resources. A Fact Sheet, and associated documents are available for review. For inquiries or to request copies of documents, contact: Tim Pilon; 555 Cordova Street, Anchorage, AK 99501, (907) 451-2136, tim.pilon@alaska.gov For office locations or to view electronic copies of the permit documents, please see the DEC website at http://dec.alaska.gov/water/wastewater/. Public Notice Start Date: January 30, 2026 Expiration Date: March 2, 2026 Any person desiring to comment on the permit may submit comments electronically via the DEC public notice website (preferred) at https://dec.alaska.gov/commish/public-notices/. Comments or requests and must be submitted (mailed must be postmarked) on or before the expiration date of the public notice. A request for public hearing on the APDES draft permit must be submitted within 30 days of the issuance of this public notice. Disability Reasonable Accommodation Notice: The State of Alaska, Department of Environmental Conservation, complies with Title II of the Americans with Disabilities Act (ADA) of 1990. If you are a person with a disability who may need special accommodation in order to participate in this public process, please contact ADA Coordinator Kristin Mabry, kristin.mabry@alaska.gov, 1-907-334-0884; or TDD Relay Service 1-800-770-8973/TTY or dial 711 at least 3 days prior to the expiration/closure date of this public notice to ensure that any necessary accommodations can be provided. Pub: Feb. 1, 2026