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Great Lakes Dredge & Dock Takes Delivery of Acadia, a State-of-the-Art Subsea Rock Installation Vessel

  • Great Lakes Dredge & Dock Corporation took delivery of the Acadia, a Jones Act-compliant subsea rock installation vessel, from Hanwha Philly Shipyard on June 25, 2026.
  • The vessel is the first U.S.-flagged subsea rock installation vessel of its kind & is designed to transport & place rock materials to protect offshore wind infrastructure.
  • Acadia will mobilize immediately to support Equinor's Empire Wind 1 project offshore New York.
  • Following Empire Wind 1, the vessel will proceed to Ørsted's Sunrise Wind project, also offshore New York.
  • Upon completion of the two U.S. projects, Acadia will mobilize to Europe to perform rock installation for a major offshore wind developer for the majority of 2027.
  • Lasse Petterson, President & CEO of Great Lakes Dredge & Dock, stated the vessel marks a transformative moment & positions the company at the forefront of subsea rock installation.
  • Great Lakes Dredge & Dock operates the largest & most diverse fleet in the U.S. dredging industry, comprising approximately 200 specialized vessels.
  • The company maintains an Incident-and Injury-Free® safety management program integrated into all aspects of its operations.