On Monday, July 1, 1929, the suspended car made its last trip across the canal. The bridge's modification to operate with a lift span began on April 8, 1929, with a low bid of $448,000 by the Kansas City Bridge Company. The Aerial Lift Bridge was first operated on March 19, 1930. The bridge has a clearance of 138 feet when the lift section is completely up and when down it is 16.5 feet above the water. The length of the span is 386 feet and weighs 900 tons. The distance from the water to the lower edge of the truss is 172 feet 7 inches; to the top of the truss it is 227 feet. During the shipping season it makes about 25 lifts a day. The new bridge is owned and operated by the City of Duluth on permit authorized by Congress. The Ship Canal and grounds are under the authority of the Lake Superior Area Office of the U.S. Army Corps of Engineers.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
West Duluth; Duluth Missabe and Northern Railroad; number 6 Dock Construction; pile foundation; pile driving; workers; workmen; winter; snow; ore dock; Lake Superior; photograph number 23; equipment; March 22, 1917
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
West Duluth; Duluth Missabe and Northern Railroad; Junctions of Steel with Concrete wall approach; number 6 dock construction; steam equipment; steel girders being placed by crane; workers; workmen; equipment; building materials; railroad tracks; photograph number 26; April 6, 1917
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
West Duluth; Duluth Missabe and Northern Railroad; Foundation showing Sheet Piling; construction of number 6 dock; winter; snow; ore dock; tug boat; crane; railroad tracks; piling foundation; pile driver; June 21, 1917; photograph number 28
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
West Duluth; Duluth Missabe and Northern Railroad; Erecting Approach of number 6 dock; number 6 dock construction; equipment; steel girders being placed; crane; workers with guide wires; workmen; houses; tents; June 21, 1917; photograph number 29
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections