Duluth Seaway Port Authority
The Duluth Seaway Port Authority operates the Port of Duluth-Superior, North America's farthest-inland freshwater seaport, serving as a major multimodal shipping hub on the Great Lakes-St. Lawrence Seaway.
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7 companies
Erie Sand & Gravel Co (Division of Great Lakes Minerals)
Great Lakes Minerals' operations primarily serve the building materials and construction, energy and metallurgy industries.
Limestone Bay Club
Limestone Bay Yacht Club is a private marina and social club located on the Ohio River in Prospect, KY, offering floating docks, shore power, water, and clubhouse facilities for vessels up to 50 feet.
Oglebay Norton
We own strategically located, proven, long-life reserves of high-quality industrial minerals. Great Lakes Minerals The largest and highest-quality limestone producer on the Great Lakes, with quarries, processing plants, docking facilities and the largest fleet of self-unloading U.S.- Flag vessels on the Lakes. Global Stone Operates limestone quarries and lime and limestone processing facilities serving customers located primarily in the Mid-Atlantic and southeastern United States. Performance Minerals Mines and processes specialized industrial minerals, primarily high-purity silica sands and muscovite mica, with facilities in the southwestern United States, Ohio and North Carolina.
Ports of Indiana
The Ports of Indiana is a quasi-governmental organization that operates a statewide system of ports, foreign trade zones and economic development programs under the authority of the Indiana Port Commission, a seven-member bipartisan board appointed by the governor.
Terral River Service (Marine Headquarters)
Terral River Service provides marine solutions, load/unload services, and equipment sales with decades of experience on inland waterways.
USS Great Lakes Fleet Inc.
Great Lakes Fleet, Inc. is a U.S.-flag maritime transportation company headquartered in Duluth, Minnesota, operating a fleet of eight self-unloading bulk carriers on the Great Lakes and St. Lawrence Seaway.