Interstate 535 crossing in Duluth–Superior Richard I. Bong Memorial Bridge – the nearby U.S. Route 2 crossing Sky Ride – the other ferry bridge built in the U.S. as an exhibit at the 1933–1934 World's Fair, "Century of Progress," in Chicago Stillwater Bridge (St. Croix River) – another lift bridge in Minnesota, connecting to Wisconsin References External links Transporter bridges Vertical lift bridges in Minnesota Buildings and structures in Duluth, Minnesota Road bridges on the National Register of Historic Places in Minnesota Transportation in Duluth, Minnesota Bridges completed in 1905 Bridges completed in 1930 Drawbridges on the National Register of Historic Places Historic American Engineering Record in Minnesota National Register of Historic Places in St. Louis County, Minnesota 1905 establishments in Minnesota Historic Civil Engineering Landmarks Duluth, Minnesota