Mainstay Maritime
Great Lakes marine bulk and liquids logistics group operating 23 U.S.-flagged Jones Act vessels, with ship repair and fabrication in Ashtabula, Ohio.
Williamsville, NY · Group
About
Mainstay Maritime cites 118 years of Great Lakes shipping experience, more than 825 employees and 1,436 annual discharges, with its fleet travelling more than 337,000 miles per season. Its operating companies are American Steamship Company, Grand River Navigation, Andrie and Conneaut Creek Ship Repair.
Andrie, a Great Lakes carrier of petroleum, chemical and dry cargoes based in Muskegon, Michigan, was acquired by Mainstay in 2024. CCSR draws on more than 35 years of marine and heavy industrial repair experience and is a member of the ISNet and Avetta safety and quality programs.
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