 ACHESON, Alberta, July 21, 2021 GLOBE NEWSWIRE -- North American Construction Group Ltd. NACG or the Company TSX:NOA.TONYSE:NOA today announced a contract amendment to a multiple use agreement between the Mikisew North American Limited Partnership MNALP and a major oil sands producer with an expiration date of December 2023. NACG anticipates its share to be approximately 175 million in additional revenue over the remainder of the agreement. 