map image of duluth minnesota and superior wisconsin - shipping port 2

map duluth minnesota superior wisconsin shipping port louis county douglas shows major interstates highways landmark nearby cities represent cartography travel navigation tourism lake minnesota's arrowhead hub cargo commodities shipped include coal iron ore grain limestone cement salt wood pulp steel coil wind turbine components twig saginaw hermantown cloquet scanlon esko proctor carlton bartlett international airport fish reservation arnold french river brule adolph