Northern Dynasty: U.S. Army Corps Have Extended Deadline to Comment on Future Plans to June 23, 2023

Northern Dynasty: U.S. Army Corps Have Extended Deadline to Comment on Future Plans to June 23, 2023

June 12, 2023 Vancouver – Northern Dynasty Minerals Ltd. (TSX: NDM; NYSE American: NAK) ("Northern Dynasty"

or the "Company" or “NDM”) reports that its 100% -owned U.S.-based subsidiary Pebble Limited Partnership

(“Pebble Partnership” or “PLP”) has been informed that the Alaska Dist rict of the U.S. Army Corps of Engineers

(“USACE”) requested an extension of the 45 day deadline to communicate the plan on how the District plans to

move forward with its reconsideration of the administrative record after remand. The Division Engineer approved

the request for extension and the revised deadline is June 23, 2023.

As reported by the Company on May 1, 2023, in a news release entitled “US Army Corps Remand highlights serious

flaws in the permitting decision”, the USACE Pacific Ocean Division had given the Alaska District 45 days to review

the appeal decision and notify the parties how it plans to proceed in light of the EPA’s Final Determination. This

deadline expired on Friday, June 9, 2023. The news release is available at the following link:

https://northerndynastyminerals.com/news/news-releases/2023/northern-dynasty-u.s-army-corps-remand-

highlights-serious-flaws-in-the-permitting-decision/

About Northern Dynasty Minerals Ltd.

Northern Dynasty is a mineral exploration and development company based in Vancouver, Canada. Northern

Dynasty's principal asset, owned through its wholly owned Alaska -based U.S. subsidiary, Pebble Limited

Partnership, is a 100% interest in a contiguous block of 1,840 mineral claims in Southwest Alaska, including the

Pebble deposit, located 200 miles from Anchorage and 125 miles from Bristol Bay. The Pebble Partnership is the

proponent of the Pebble Project.

For further details on Northern Dynasty and the Pebble Project, please visit the Company's website at

www.northerndynastyminerals.com or contact Investor services at (604) 684-6365 or within North America at 1-

800-667-2114. Review public filings, which include forward looking information cautionary language and risk

factor disclosure regarding the Company and the Pebble Pro ject in Canada at www.sedar.com and the US at

www.sec.gov.

Ronald W. Thiessen

President & CEO

U.S. Media Contact:

Dan Gagnier, Gagnier Communications (646) 569-5897