Major merger announced, Kiewit acquires Weeks Marine

U.S. dredging contractor Weeks Marine has been acquired by Kiewit Corporation of Omaha, Nebraska, one of North America’s largest construction and engineering organizations.


The acquisition, which was completed on Jan. 1, 2023, includes the purchase of Weeks Marine and its subsidiaries Healy Tibbitts Builders, Inc., McNally International, Inc. and North American Aggregates for an undisclosed amount.

“This acquisition offers substantial opportunities for both companies,” commented Kiewit CEO Rick Lanoha. “For Weeks employees, they join one of the largest, most successful construction and engineering organizations in the world. For Kiewit, we gain an exceptionally skilled workforce and the ability to add Weeks’ leading maritime engineering and construction capabilities, dynamic dredging expertise and renowned tunneling services to our portfolio of service.”

Weeks Marine and Kiewit organizations have worked together on several joint ventures since the 1960s. Through these partnerships, it was apparent that the companies share similar cultures and values.

“Our shared cultures and values, which focus on the success and growth of our people, a relentless commitment to safety and quality, and demanding excellence in everything we do, will make this acquisition a success,” Lanoha added.

“We’ve worked closely with Kiewit on many strategic infrastructure projects across North America, including the Goethals Bridge, Willis Avenue Swing Bridge, the Euclid Storage Tunnel, the Toronto-York Spadina Subway Extension Tunnel, among others,” said Eric Ellefsen, President and CEO of Weeks Marine. “Through these partnerships, it was apparent that the companies share similar cultures and values.”

From now on, Weeks Marine and its subsidiaries will be independently branded subsidiaries of Kiewit.