Acadia
An SRIV of the S211 design by Ulstein Design & Solutions BV, designed to carry up to 20,000 metric tonnes of rock. An inclined fall pipe system secures the precise subsea placement of rocks, providing scour protection for offshore wind turbine foundations. The vessel boasts an overall length of 140.5 metres (461 feet), a breadth of 34.1 metres (112 feet), and accommodation for 45.
Primary specifications as built
Additional Data
Ship history
Acadia, built by Hanwha Philly Shipyard, is the first U.S.-flagged, Jones Act-compliant subsea rock installation vessel (SRIV) in the U.S. commercial fleet and is critical to developing U.S. offshore wind projects. The vessel enables specialised subsea operations, making it an essential tool for offshore wind projects. With her large, robust aft deck, the Acadia is a highly flexible asset for Great Lakes Dredge & Dock (GLDD).
Milestones
2020, Dec: Basic design contract
2021, Apr: Integration engineering contract
2021, Nov: Shipyard selected
2023, Jul: Steel cut
2024, Jun: Keel lay
2025, Jul: Launch
2026, Mar: Sea trials
2026, June: Delivered
Designed to transport and precisely place rock on the seabed, Acadia provides scour protection for subsea cables, pipelines and offshore wind turbine foundations.
Following delivery, the vessel is scheduled to support offshore wind projects in the United States, including Equinor’s Empire Wind 1 project and Ørsted’s Sunrise Wind project. After completing its first projects in the United States, Acadia is planned to continue operations in the European offshore energy market through contracts secured for 2027.
Time-lapse video of the launch
Want to see how it all unfolded? A time-lapse video of the launch operation is now available on the GLDD homepage: Offshore Energy
