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Northern Dynasty Update Regarding Ongoing Pebble Permitting Process

Permits & Approvals

Northern Dynasty Update Regarding Ongoing Pebble Permitting Process

September 4, 2018 Vancouver – Northern Dynasty Minerals Ltd. (TSX: NDM; NYSE American: NAK)

("Northern Dynasty" or the "Company") advises that the United States Army Corps of Engineers has

released the Scoping Document for the ongoing Environmental Impact Statement (“EIS”) assessment of the

Pebble Project. This EIS process is an integral part of permitting the Pebble Project under the National

Environmental Policy Act (“NEPA”).

We would also like to announce that Northern Dynasty will be presenting at the H.C. Wainwright Global

Investment Conference at 11:40 am EDT on September 6, 2018 (venue is The St. Regis Hotel, New York).

This webcast presentation can be accessed for 90 days at: http://wsw.com/webcast/rrshq28/nak/

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 US subsidiary Pebble

Limited Partnership and other wholly-owned subsidiaries, is a 100% interest in a contiguous block of 2,402

mineral claims in southwest Alaska, including the Pebble deposit. 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 US public filings at www.sec.gov.

Ronald W. Thiessen

President & CEO

Canadian Media Contact:

Ian Hamilton

DFH Public Affairs

(416) 206-0118 x.222

US Media Contact:

Dan Gagnier

Gagnier Communications

(646) 569-5897

Forward Looking Information and Cautionary Factors

This release includes certain statements that may be deemed "forward-looking statements". All statements in this release, other than

statements of historical facts, that address exploration drilling, exploitation activities and events or developments that the Company

expects are forward -looking statements. Although the Company believes the expe ctations expressed in its forward -looking

statements are based on reasonable assumptions, such statements should not be in any way construed as guarantees of the ultimate

size, quality or commercial feasibility of the Pebble Project or of the Company's future performance or the outcome of litigation.

Assumptions used by the Company to develop forward -looking statements include the following: the Pebble Project will obtain all

required environmental and other permits and all land use and other licenses, stu dies and development of the Pebble Project will

continue to be positive, and no geological or technical problems will occur. The likelihood of future mining at the Pebble Pr oject is

subject to a large number of risks and will require achievement of a numbe r of technical, economic and legal objectives, including

obtaining necessary mining and construction permits, approvals, licenses and title on a timely basis and delays due to third party

opposition, changes in government policies regarding mining and natural resource exploration and exploitation, the final outcome of

any litigation, completion of pre -feasibility and final feasibility studies, preparation of all necessary engineering for surface or

underground mining and processing facilities as well as rec eipt of significant additional financing to fund these objectives as well as

funding mine construction. Such funding may not be available to the Company on acceptable terms or on any terms at all. There is

no known ore at the Pebble Project and there is no assurance that the mineralization at the Pebble Project will ever be classified as

ore. The need for compliance with extensive environmental and socio -economic rules and practices and the requirement for the

Company to obtain government permitting can cause a delay or even abandonment of a mineral project. The Company is also subject

to the specific risks inherent in the mining business as well as general economic and business conditions.

The NEPA EIS process requires a comprehensive “alternatives assessment” be undertaken to consider a broad range of development

alternatives, the final project design and operating parameters for the Pebble Project and associated infrastructure may vary

significantly from that currently being advanced. As a result, the Company will continue to consider various development options and

no final project design has been selected at this time. For more information on the Company, Investors should review the Company's

filings with the United States Securities and Exchange Commiss ion and its home jurisdiction filings that are available at

www.sedar.com.