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CN Cloquet River Bridge

Warren Deck Truss Bridge across Cloquet River
Burnett, St. Louis County, Minnesota

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Name CN Cloquet River Bridge
Built By Duluth & Iron Range Railway
Contractor American Bridge Company of New York
Currently Owned By Canadian National Railway
Length 440 Feet Total, 170 Foot Main Span
Width 2 Tracks, 1 In Use
Height Above Ground 40 Feet (Estimated)
Superstructure Type Warren Deck Truss and Deck Girder
Substructure Type Stone Masonry, Concrete and Steel Tower
Date Built 1906 (SB), 1924 (NB)
Traffic Count 12 Trains/Day (Estimated)
Current Status In Use, SB Span Not In Use
Significance Moderate Significance


Located near the small isolated town of Burnett, this large deck truss bridge crosses the Cloquet River.
Originally, the bridge was built during the first construction of the line. This structure was likely a light deck truss bridge.
In 1906, a second track was added on the west side of the existing structure. This new structure featured an 8-panel, riveted Warren Deck Truss with a series of deck girder spans on either side. This track was set onto concrete and steel substructures.
The original bridge was replaced in 1924 with an identical span to the 1906 structure. This structure was set onto stone and steel substructures.
Other than the different build dates, these structures are remarkably similar. Overall, the bridge appears to be in good condition. The 1906 structure is currently out of use.

The author has ranked this bridge as being moderately significant, due to the truss design.
The photo above is an overview, with County 694 behind.


Detail Photos

Citations

Source Type

Source

Build Date American Bridge Company plaques
Contractor American Bridge Company plaques
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele