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MCM Marine Inc., Sault Ste. Marie, MI

MJO Contracting Inc., Hancock, MI

MacDonald Marine Ltd., Goderich, ON

Marine International Dragage Inc., Sorel-Tracy, QC

Malcolm Marine, St. Clair, MI

Marine Recycling Corp., Port Colborne, ON

Marine Services Inc., Oak Park, MI

Maritime Corp., Washington Twp., MI

Martin Gas and Oil, Beaver Island, MI

McAsphalt Marine Transportation Ltd., Scarborough, ON

McKeil Marine Ltd., Hamilton, ON

McMullen & Pitz Construction Co., Manitowoc, WI

McNally International Inc., Hamilton, ON

Michels Corporation, Brownsville, WI

Middle River Marine LLC, Mokena, IL

Mike Scruton Marine, Port Dover, ON

Milwaukee Harbor Commission, Milwaukee, WI

Montreal Boatmen Ltd., Pointe-aux-Trembles, QC

Montreal Port Authority, Montreal, QC