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
The Acadia is the only 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 GLDD.
Ulstein celebrates GLDD's SRIV ‘Acadia’ keel laying at Philly shipyard
Milestones
2020, Dec: Basic design contract
2021, Apr: Integration engineering contract
2021, Nov: Shipyard selected
2023, Jul: Steel cut
2024, Jun: Keel lay
2025, July: Launch: On July 16, the Acadia was launched into the water of the Delaware River at the Hanwha Philly Shipyard.
The vessel is scheduled for completion in the first quarter of 2026 and is expected to begin operations immediately thereafter, first on Equinor's Empire Wind 1 project and then on Orsted's Sunrise Wind project.
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
