U.S. Coast Guard Cutter Mackinaw travels in the Duluth harbor while breaking ice on Saturday.
The Aerial Lift Bridge connects ships between Lake Superior and Duluth Harbor along with the St. Louis River. It also connects people on foot, bike and car between Canal Park and Park Point.
The MV Paul R. Tregurtha, the longest ship on the Great Lakes at 1013.5 feet, passes under the iconic Aerial Lift Bridge as it arrives in Duluth Harbor. (Anthony Soufflé/The Minnesota Star Tribune) ...