Northern Dynasty: Pebble Partnership asks Court to enforce speedy action by the EPA in its response to defendant’s motion for Remand with Vacatur Arguments presented echo concerns raised by the State of Alaska regarding the EPA’s

Northern Dynasty: Pebble Partnership asks Court to enforce speedy action by the EPA in its response to

defendant’s motion for Remand with Vacatur

Arguments presented echo concerns raised by the State of Alaska regarding the EPA’s

previous slow actions on making a decision

October 13, 2021 Vancouver – Northern Dynasty Minerals Ltd. (TSX: NDM; NYSE American: NAK) ("Northern

Dynasty" or the "Company") advises that its 100% -owned, U.S. -based Pebble Limited Partnership (“Pebble

Partnership”) has filed a motion which requests the Court set a schedule requiring the U.S. Environmental

Protection Agency (“EPA”) to make a prompt decision to either withdraw or finalize a decision on the 2014

Proposed Determination.

“Recall that the 2014 Proposed Determination by the EPA was pending for five years before finally being

withdrawn in 2019, and now, two years later, the Proposed Determination is being resurrected,” said Ronald

Thiessen, President and CEO of Northern Dynasty. “As the State of Alaska noted in its motion, ‘The EPA should not

be allowed to remand the Proposed Determination into administrative no-mans-land for indefinite proceedings for

an indefinite time…’ We, too, believe the imposition of a schedule by the Court is necessary to ensure that the EPA

does not let the Proposed Determination languish, and therefore attempt to regulate by inaction.”

“If they decide to proceed with their Proposed Determination, then we will again pursue a legal challenge, and

with the strong administrative record of the overwhelmingly positive Final Environmental Impact S tatement of

2020, and the Proposed Determination which is not supported b y an adequate record, we believe we will win. If

they decide to abandon this unheralded abuse of power and instead apply a science and fact-based process, free

from political interference, then they should uphold the EPA withdrawal. Either way, they must decide in a timely

basis, because we believe that a prompt decision is required by due process,” Mr. Thiessen added.

On this issue the State of Alaska responded to the Federal Court in Alaska similarly, agreeing to the remand only

on the basis that the EPA agree to a court-imposed schedule for either vacating the 2014 Proposed Determination

or finalizing it.

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 bl ock of 2,402 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, an initiative to develop one of the world's most important mineral resources.

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 Canadian public filings at www.sedar.com and U.S. public filings at www.sec.gov.

Ronald W. Thiessen

President & CEO

U.S. Media Contact:

Dan Gagnier, Gagnier Communications (646) 569-5897

Forward Looking Information and other Cautionary Factors

This release includes certain statements that may be deemed "forward-looking statements" under the United States Private Securities

Litigation Reform Act of 1995 and under applicable provisions of Canadian provincial securities laws . All statements in this release,

other than statements of historical facts, which address permitting, development and production for the Pebble Project are forward-

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looking statements. These include statements regarding (i) the mine plan for the Pebble Project, (ii) the social integration of the

Pebble Project into the Bristol Bay region and benefits for Alaska, (iii) the political and public support for the permitting process, (iv)

the ability to successfully appeal the negative Record of Decision and secure the issuance of a positive Record of Decision by the U.S.

Army Corps of Engineers and the ability of the Pebble Project to secure all required federal and state permits, (v) the right-sizing and

de-risking of the Pebble Project, (vi) the design and operating parameters for the Pebble Project mine plan, including projected capital

and operating costs , (vii) exploration potential of the Pebble Project, (viii) future demand for copper and gold, (ix) the potential

addition of partners in the Pebble Project, (x) the EPA’s Proposed Determination process under the CWA and the impact of this

process on the ability of the Pebble Partnership to develop the Pebble Project and (xi) the ability and timetable of NDM to develop

the Pebble Project. Although NDM believes the expectations expressed in these forward-looking statements are based on reasonable

assumptions, such statements should not be in any way be construed as guarantees that the Pebble Project will secure all requ ired

government permits, establish the commercial feasibility of the Pebble Project, achieve the required financing or develop the Pebble

Project.

Forward-looking statements are necessarily based upon a number of factors and assumptions that, while considered reasonable by

NDM as of the date of such statements, are inherently subject to significant business, economic and competitive uncertainties and

contingencies. Assumptions used by NDM to develop forward-looking statements include the assumptions that (i) the Pebble Project

will obtain all required environmental and other permits and all land use and other licenses without undue delay, (ii) any feasibility

studies prepared for the development of the Pebble Project will be positive, (iii) NDM’s estimates of mineral resources will not change,

and NDM will be suc cessful in converting mineral resources to mineral reserves, (iv) NDM will be able to establish the commercial

feasibility of the Pebble Project, (v) NDM will be able to secure the financing required to develop the Pebble Project , and (vi) any

action taken by the EPA in connection with the Proposed Determination will ultimately not be successfully in restricting or prohibiting

development of the Pebble Project. The likelihood of future mining at the Pebble Project is subject to a large number of risks and will

require achievement of a number of technical, economic and legal objectives, including (i) obtaining necessary mining and

construction permits, licenses and approvals without undue delay, including without delay due to third party opposition or ch anges

in government policies, (ii) finalization of the mine plan for the Pebble Project, (iii) the completion of feasibility studies demonstrating

that any Pebble Project mineral resources that can be economically mined, (iv) completion of all necessary enginee ring for mining

and processing facilities, (v) the ability of NDM to secure a partner for the development of the Pebble Project, and (vi) rec eipt by

NDM of significant additional financing to fund these objectives as well as funding mine construction, whic h financing may not be

available to NDM on acceptable terms or on any terms at all. NDM is also subject to the specific risks inherent in the mining business

as well as general economic and business conditions, such as the current uncertainties with regard to COVID-19. Investors should

also consider the risk factors identified in its Annual Information Form for the year ended December 31, 2020, as filed on SEDAR and

included in the Company’s annual report on Form 40-F filed by the Company with the SEC on EDGAR.

The National Environment Policy Act Environmental Impact Statement process requires a comprehensive “alternatives assessment”

be undertaken to consider a broad range of development alternatives, the final project design and operating parameters for th e

Pebble Project and associated infrastructure may vary significantly from that currently contemplated.

For more information on the Company, Investors should review the Company's filings with the United States Securities and Exchange

Commission at www.sec.gov and its home jurisdiction filings that are available at www.sedar.com.