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 April 2023 Commission File Number 001-33161 NORTH AMERICAN CONSTRUCTION GROUP LTD. 27287 - 100 Avenue Acheson, Alberta T7X 6H8 (780) 960-7171 (Address of principal executive offices) Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F. For ...