The Great Lakes Dredge & Dock (GLDD) rock installation vessel for the US offshore wind industry.

Acadia

An SRIV designed to carry up to 20,000 metric tonnes of rock. An inclined fall pipe system to secure the precise subsea installation of rocks creates 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.

Vessel Type
Owned By
Great Lakes Dredge & Dock Co. LLC (GLDD)
Built By
Partner yard

Primary Specifications

Length
140.5 m
Beam
34.1 m
Draught (max)
7.0 m
Speed (max)
12 kn
Accommodation
45 POB

Additional Data

Rock carrying capacity
20,000 tonne
Note: Specifications may have changed since the original completion date.

Ship history

The Acadia will be the only Jones Act-compliant rock placement vessel in the U.S. commercial fleet and is a critical vessel needed to develop U.S. offshore wind projects. The vessel enables specialised subsea operations, making it an essential tool for offshore wind projects. With its large and robust aft deck area, 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

Ul

Ulstein Design & Solutions B.V.