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Gabriel Marine Construction & Dredge LLC, Algonac, MI

Gaelic Tugboat Co., Detroit, MI

Galcon Marine Ltd., Toronto, ON

Gallagher Marine Construction Co., Escanaba, MI

Gardiner Marine, Richards Landing, ON

Geo. Gradel Co., Toledo, OH

Gillen Marine Construction LLC, Mequon, WI

Gordon’s Shoreline Marine, Sarnia, ON

Gordon’s Welding, Sarnia, ON

Grand River Navigation Co., Traverse City, MI

Great Lakes Dock & Materials LLC, Muskegon, MI

Great Lakes Fleet Inc., Duluth, MN

Great Lakes Offshore Services Inc., Port Dover, ON

The Great Lakes Towing Co., Cleveland, OH

Groves Marine Ltd., Nobel, ON