The Aerial Lift Bridge, earlier known as the Aerial Bridge or Aerial Ferry Bridge, is a landmark in the port city of Duluth, Minnesota.The span began life in 1905 as the United States' first transporter bridge: Only one other was ever constructed in the country, Sky Ride in Chicago. [2] The span was converted in 1929–1930 to a vertical-lift bridge, also rather uncommon, although there are ... More @Wikipedia
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