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Manson Construction Co.


Head Office
5209 East Marginal Way South
Seattle WA WA 98134
United States


+1-206-762 0850
+1-206-764 8590

Postal Address

PO Box 24067
WA 98124

Last updated

14 years 25 weeks ago


Experience, integrity and dependability have made Manson Construction Co. the quality name in heavy marine construction and dredging for more than 100 years.

With a world-class marine construction fleet and a workforce that’s unsurpassed for its experience and dedication to safety, we consistently deliver the best value on projects.

Equipment - active

Type Number Power Volume
Trailing suction hopper dredgers 5 17125 kW 29062 m³
Cutter suction dredgers 5 12682 kW
Backhoe dredges 1
Grab dredgers 12 5302 kW
Stone dumping and fallpipe vessels 1
Special and other equipment 7
Name Type Built Power Volume
Andrew CLD
Bayport TSHD 1996 3580 kW 3825 m³
Bob Lofgren CSD 1980 3730 kW
Derrick 24 CLD
Derrick 3 CLD
Derrick 6 CLD
Derrick 8 CLD
Einar CLD
Frank Bechtolt CSD 1492 kW
Frederick Paup TSHD 2022 11468 m³
Freya CLD
Glenn Edwards TSHD 2006 8663 kW 9180 m³
Haakon GD 1119 kW
Hagar CLD 1967
HR Morris CSD 1997 7460 kW
Leonard J csd
Newport TSHD 1982 2942 kW 3060 m³
Njord GD 1942 2733 kW
Norseman CLD
Robert M White CSD 2017
Rockport HB
Scandia CLD
Southman STFV
Valhalla CLD
Valkyrie CLD
Vasa CLD
Viking CLD
Vulcan CLD
Westport TSHD 1978 1940 kW 1529 m³
Wotan CLD 1450 kW

Equipment - historical

Name Type Built Power Volume
Captain Nielsen CSD 3353 kW
Don Johnson CSD 2984 kW
Husky CSD 3730 kW
Mr Manson CSD 4476 kW


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