Minnesota Department of Transportation

511 Travel Info

Historic Bridges

Approach Span for Ore Dock #5 (Bridge 69829)

Approach Span for Ore Dock #5 (Bridge 69829)

Approach Span for Ore Dock #5
See features of the bridge

History & significance

Bridge 69829 is part of the Duluth, Missabe & Northern Railway / Duluth, Missabe & Iron Range Railway Ore Dock No. 5 Approach located in Duluth, St. Louis County. Constructed by the DM&N in 1913-1914, the DM&N / DM&IR Ore Dock No. 5 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. 5, which is sited in the St. Louis Bay of Lake Superior. Bridge 69829 was designated in 1966-1967, after spans 43-45 of the approach were modified to accommodate the construction of Interstate 35 under them. The modification included replacing Bents 43 and 44 with a single bent, replacing Span 44 with new girders, and installing drainage pans and a chain link railing. The Ore Dock No. 5 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: 46.75272422, -92.13962707

Bridge features

Approach Span for Ore Dock #5

One of a series of riveted plate girder spans
supported on riveted, two- and four-legged steel bents. Specific superstructure construction features include cross-bracing between the girders.

Approach Span for Ore Dock #5
ā€œSā€-curve alignment of the structure.
Approach Span for Ore Dock #5

DM&N / DM&IR Ore Dock No. 5 at southeast end of
approach structure.

Approach Span for Ore Dock #5
One of a series of riveted plate girder
spans supported on riveted, two- and
four-legged steel bents. Specific
superstructure construction features
include cross-bracing between the
girders.