The Aerial Lift Bridge (Night). The Aerial Lift Bridge Is A Major Landmark In The Port City Of Duluth, Minnesota. The Span Is A Vertical Lift Bridge, Which Is Rather Uncommon, But It Began Life As An Extremely Rare Transporter Bridge—The First Of Just Two Such Bridges Ever Constructed In The United States. Originally Built In 1905, The Bridge Was Upgraded In 1929€“30 To The Current Lifting Design And Continues To Operate Today. The Bridge Was Added To The National Register Of Historic Places On May 22, 1973.

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