Minnesota Department of Transportation

511 Travel Info

Historic Bridges

Bridge 7632

Bridge 7632

Bridge 7632
See features of the bridge

History & significance

Bridge 7632 is part of the Duluth, Missabe & Northern Railway (DM&N) / Duluth, Missabe & Iron Range Railway (DM&IR) 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 DM&N / DM&IR Ore Dock No. 6, which is sited in the St. Louis Bay of Lake Superior. Bridge 7632 is located at the western end of the approach structure, between the abutment and Bridge 7627. Constructed in 1917, it is a single-span, deck girder structure of riveted steel construction that carries the ore dock approach over Grand Avenue/West 3rd 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: 46.75753407, -92.14292669

Bridge features

Bridge 7632

DM&N / DM&IR Ore Dock No. 6 at southeast end of
approach structure.

Bridge 7632
Curve in the alignment of the structure.
Bridge 7632

Part 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.

Bridge 7632
Part 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.