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Sturgeon River Railroad Bridge

Sturgeon River Railroad Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: October 1, 2012

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Key Facts

Facility Carried / Feature Intersected
Railroad (Abandoned Soo Line) Over Sturgeon River
Location
Rural: Houghton County, Michigan: United States
Structure Type
Metal Through Girder, Fixed
Construction Date and Builder / Engineer
1913 By Builder/Contractor: Wisconsin Bridge and Iron Company of Milwaukee, Wisconsin

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
65 Feet (19.81 Meters)
Structure Length
145 Feet (44.2 Meters)
Roadway Width
Not Available
Spans
3 Main Span(s)
NBI Number
Not Applicable

Historic Significance Rating (HSR)

Bridge Documentation

Although plate girder bridges are among the most common types of railroad bridges, this bridge stands out as noteworthy for its large central span, and for its historic integrity. The bridge has three spans, and the center span is much longer than the end spans, giving the bridge a distinctive appearance. The end spans feature girders with squared corners, while the center span has rounded corners on the top chord. The length of the main span is among the longer plate girder spans to be found and as such it is noteworthy for demonstrating the potential of plate girder technology. The bridge sits on riveted caissons. Caissons were common for highway truss bridge supports in the Midwest United States, but are uncommon elsewhere and are also uncommon on railroad bridges. The bridge was built by the Wisconsin Bridge and Iron Company, which was a prolific bridge builder in Michigan. The bridge is abandoned, but retains rails on its deck. It is essentially unaltered from when it was first constructed.

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