We were in Duluth, Minnesota a couple of weeks back, as you can see by clicking here. Thought I would go on a little be more about it and show you a little video I took of a barge passing under the lift bridge.
The lift portion of the bridge goes up and down depending on the size of the vessel needing to pass under it.
These particular videos are of a large barge passing under. (They say Moose Lake but that was just the name on the file I uploaded them from…it *is* Duluth.)