'Chicago & Waukegan are Illinois' busiest ports on this lake'
Lake Michigan
U.S. BODIES OF WATER: Chicago & Waukegan are Illinois' busiest ports on this lake
Chicago & Waukegan are Illinois' busiest ports on this lake
Chicago & Waukegan are Illinois' busiest ports on this lake
U.S. BODIES OF WATER
Lake Michigan
U.S. BODIES OF WATER