Lower Lakes Towing grew from its infancy in 1994 as a small tug and barge operator to become one of the largest marine transp ... ortation service providers operating on the Great Lakes today. Lower Lakes Towing operates a fleet of five self-unloading bulk carriers and two conventional bulk carriers in Canada. Combined with our U.S. sister companies, we have a combined fleet of 23 vessels on the Great Lakes. These vessels transport a diverse array of dry bulk commodities including limestone, coal, iron ore, salt, grain and other commodities for more than 50 long-standing customers in the construction, electric utility, integrated steel and food industries. read more