Life on Duluth's Aerial Lift Bridge: Lots of ups, few downs
August 5, 2016 - MPR’s Dan Kraker profiles Duluth's five lift bridge operators and their very unique work window view. The Duluth Aerial Lift Bridge span goes up and down about 4,500 times every year, 24 hours a day, seven days a week during the Great Lakes shipping season that runs from March to January.