6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of October 2021

Commission File Number: 001-33161

North American Construction Group Ltd. (Translation of registrant's name into English)

North American Energy Partners Inc. (Former Name)

27287- 100 Avenue (Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F. Form 20-F [   ]      Form 40-F [ X ]

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes [   ]                 No [X]

If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82- ___

Documents Included as Part of this Report

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

EdgarFiling EXHIBIT 99.1

North American Construction Group Ltd. Announces Financial Close of Major Infrastructure Project

ACHESON, Alberta, Oct. 14, 2021 (GLOBE NEWSWIRE) -- North American Construction Group Ltd. (“NACG” or “the Company”) (TSX:NOA.TO/NYSE:NOA) today along with its partners Acciona and Shikun & Binui announced the financial close of the Red River flood mitigation project in the United States.

The financial close follows the contract award which was previously announced by the Company on June 21, 2021. The Metro Flood Diversion Authority (MFDA) of the Fargo-Moorhead area selected the consortium of NACG, Acciona, and Shikun & Binui in an international tender for this Public-Private Partnership contract to design, build, finance, operate and maintain the flood diversion channel for a period of 29 years following completion of the construction milestone.

The consortium has established a Green Financing Framework pursuant to which the revolving loans, bonds and senior secured notes issued as part of the financial close have been designated as “green” to allow investors to invest in investments which support climate change adaptation and resilience projects. Moody’s has assigned a preliminary investment grade rating of “Baa3” (Stable) to the bonds. Agentis Capital served as the financial advisor to the consortium.

Joe Lambert, President & Chief Executive Officer, stated: “We are excited to have met this important project milestone slightly ahead of schedule. This is a significant project for NACG and we look forward to working closely together with the Metro Flood Diversion Authority, the local communities and our partners.”

About the Project Project information can be found on the FM Area Diversion website at https://fmdiversion.gov/.

About the Company North American Construction Group Ltd. (www.nacg.ca) is one of Canada’s largest providers of heavy construction and mining services. For more than 65 years, NACG has provided services to the mining, resource, and infrastructure construction markets.

For further information, please contact:

Jason Veenstra, CPA, CA Chief Financial Officer North American Construction Group Ltd. Phone: (780) 948-2009 Email: jveenstra@nacg.ca

For more complete information about NACG, please read our disclosure documents filed with the SEC and the CSA. These free documents can be obtained by visiting EDGAR on the SEC website at www.sec.gov or on the CSA website at www.sedar.com .