Acadia is the first U.S. flagged Jones Act compliant, inclined fallpipe vessel for subsea rock installation and is based on an ULSTEIN S211 design approved by the American Bureau of Shipping (“ABS”). She will be built with best-in-class safety and low emissions standards (LEV, Sustain2).

Built by

Philly Shipyard



Owned by

Great Lakes Dredge & Dock Co. LLC (GLDD)

Designed by

Ulstein Design & Solutions B.V.

Principal dimensions

140.5 m
34.1 m
Draught (max):
7.0 m
Speed (max):
12 kn

Note: Subject to selected variant configuration

To reach the low emission and sustainability goals, the vessel design includes EPA Tier 4 engines, plug-in shore power connection for loading in ports and battery packs for peak-shaving. The vessel is also able to run on biofuel to reduce its CO2 footprint and is equipped with active emission control technology to minimise NOx emissions.

Ship history

2020, Dec: Basic design contract
2021, Apr: Integration engineering contract
2021, Nov: Shipyard selected

2023, 20 Jul: Steel cutting

Please contact us for more information

Ulstein Design & Solutions B.V.

Cornerstone Building (6th floor)
Rotterdam Airportplein 32
3045 AP Rotterdam
The Netherlands

Tel: +31 10 475 00 11