Northern Dynasty: Independent Technical Report Update and Preliminary Economic Assessment Filed

Northern Dynasty Minerals Ltd. (TSX:NDM)(NYSE American:NAK) ("Northern Dynasty" or the "Company") and 100%-owned U.S.-based subsidiary Pebble Limited Partnership ("Pebble Partnership" or "PLP") have filed a motion for leave to file an amended complaint in the federal district court in Alaska to reverse the U.S. Army Corps ("USACE") decision to deny the project a permit

Ron Thiessen, President and CEO of Northern Dynasty, said "It is important to understand that this is not a new lawsuit. It is simply an amendment of the complaint we filed against the Environmental Protection Agency ("EPA") by adding the USACE as another defendant. We think this substantially strengthens the existing case by focusing directly on the permit denial which was an underlying reason for the EPA veto."

Northern Dynasty Minerals Ltd. (TSX:NDM)(NYSE American:NAK) ("Northern Dynasty" or the "Company") announces that it has filed its audited Financial Statements, Management Discussion and Analysis, Annual Information Form and Annual Report on Form 40F for the year ending December 31, 2023. The Company also advises that, consistent with previous years, its audited consolidated financial statements for the fiscal year ended December 31, 2023 included in the Company's Annual Report on Form 40F, contained an audit report from its independent registered public accounting firm with a going concern emphasis of matter. Release of this information is required by Section 610(b) of the NYSE American Company Guide. It does not represent any change or amendment to any of the Company's filings for the fiscal year ended December 31, 2023

Northern Dynasty Minerals Ltd. (TSX:NDM);(NYSE American:NAK) ("Northern Dynasty" or the "Company") and 100%-owned U.S.- based subsidiary Pebble Limited Partnership ("Pebble Partnership" or "PLP") have been advised by the US Army Corps of Engineers ("USACE") that, after months of successive delays, the USACE has declined to engage in the remand process related to the November 25, 2020 denial of a permit application for the Pebble Project, citing the U.S. Environmental Protection Agency's ("EPA") intervening veto of the development at Pebble

After the November 25, 2020, denial of the permit application for the Pebble Project, a separate division of the USACE remanded the denial decision back to the USACE Alaska District on April 25, 2023, after an administrative review found numerous errors with the denial decision. Today, after several requests for extensions, the USACE has announced that it has declined to engage in the remand process altogether. The USACE reasoning is due to the EPA veto, which effectively prevents them from altering their decision while that veto is in place. On March 15, 2024, we announced we were filing an appeal of the EPA veto in Federal District Court in Alaska, and the State of Alaska filed its action against the veto on April 11, 2024.

Northern Dynasty Minerals Ltd. (TSX:NDM)(NYSE American:NAK) ("Northern Dynasty" or the "Company") and 100%-owned U.S.-based subsidiary Pebble Limited Partnership ("Pebble Partnership" or "PLP") note that on April 11, 2024 the State of Alaska ("the State") filed an action in Federal District Court in Alaska, seeking to vacate the Environmental Protection Agency's ("EPA") veto of a development at Pebble

To read the State's announcement of its filing, see the following link: Press Release - State Files Against EPA in U.S. District Court, Calling Out Unlawful Order on State Land in Bristol Bay (alaska.gov)

Northern Dynasty Minerals Ltd. (TSX:NDM)(NYSE American:NAK) ("Northern Dynasty" or the "Company") and 100%-owned U.S.-based subsidiary Pebble Limited Partnership ("Pebble Partnership" or "PLP") is filing two separate actions in the federal courts challenging the federal government's actions to prevent the companies from building a mine at the Pebble Project

Action Seeks to overturn EPA's illegal veto