Bridge L6137
See features of the bridge
History and significance
Bridge L6137 is part of the Duluth, Missabe & Northern Railway / Duluth, Missabe & Iron Range Railway Ore Dock No. 6 Approach located in Duluth, St. Louis County. Constructed by the DM&N in 1917-1918, the DM&N / DM&IR Ore Dock No. 6 Approach is a multi-span, riveted steel deck girder structure that historically carried the DM&N / DM&IR Mountain Iron to Mesabi Junction (Duluth) line over several city streets in Duluth, to the Ore Dock No. 6, which is sited in the St. Louis Bay of Lake Superior. Bridge L6137 is located near the middle of the approach structure, between Bridge 7627 and Bridge 69833. Constructed in 1917, it is a single-span, deck girder structure of riveted steel construction that carries the ore dock approach over West Superior Street. The Ore Dock No. 6 Approach is significant as a contributing resource to the DM&N / DM&IR Mountain Iron to Mesabi Junction (Duluth) railroad corridor. This railroad corridor is significant for the critical role it played in the transportation system that enabled the Mesabi Range to be the leading producer of iron ore in the U.S. for more than 70 years.
Location
City of Duluth (St. Louis County)
Latitude, Longitude: 46.75534757, -92.13949697
Bridge features
One of a series of two parallel, steel riveted plate girder spans now carrying a single deck and supported on riveted, steel two and four-legged bents. Specific superstructure construction features include cross-bracing between the girders. Overpass bridges, including Bridges 7632, 7627, and L6137 (but not 69833) are supported on steel, riveted two-legged bents.
Curve in the alignment of the structure.
One of a series of two parallel, steel riveted plate girder spans now carrying a single deck and supported on riveted, steel two and four-legged bents. Specific superstructure construction features include cross-bracing between the girders. Overpass bridges, including Bridges 7632, 7627, and L6137 (but not 69833) are supported on steel, riveted two-legged bents.
DM&N / DM&IR Ore Dock No. 6 at southeast end of approach structure.