Duluth, Minnesota at the western end of the Saint Lawrence Seaway, the Duluth–Superior seaport is the largest and farthest-inland freshwater seaport in North America. By far the largest and busiest on the Great Lakes, the port handles an average of 46 million short tons of cargo and over 1,100 visits each year from domestic and international vessels. With of waterfront, it is one of the leading bulk cargo ports in North America and ranks among the top 20 ports in the United States. Duluth is a major shipping port for taconite pellets, made from concentrated low-grade iron ore and destined for midwestern
Transportation in Minnesota rivers. Commercial water transportation now is limited to the shipment of bulk commodities on two routes. Barges haul grain and other products down the Mississippi River system from the ports of Minneapolis (the head of navigation), St. Paul, Red Wing and Winona on the Mississippi, and Savage (on the Minnesota River), to downstream river ports, and to ports on the Gulf of Mexico for transshipment to ocean-going cargo ships. Cargo vessels known as lakers haul grain, coal, and iron ore from the Lake Superior ports of Duluth, Superior, Two Harbors, and Silver Bay, through Lake Superior to the lower Great