Minnesota Department of Transportation

511 Travel Info

Historic Bridges

Bridge 7627

Bridge 7627

Bridge 7627
See features of the bridge

History & significance

Bridge 7627 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 Ore Dock No. 6, which is sited in the St. Louis Bay of Lake Superior. Bridge 7627 is located towards the western end of the approach structure, between Bridge 7632 and Bridge L6137. It is a single-span, deck girder structure of riveted steel construction that carries the ore dock approach over Carlton Street. The approach (also known as a viaduct) and the ore dock were constructed in 1917-1918 by the DM&N, the predecessor of the DM&IR. 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: 46.75698621, -92.14200325

Bridge features

Bridge 7627

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 7627
Curve alignment of the structure.
Bridge 7627

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

Bridge 7627
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.