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Allouez Swing Bridge

Warren Pony Truss Swing Bridge over Fox River
Allouez, Brown County, Wisconsin

Click the Photo Above to See All Photos of This Bridge!
Name Allouez Swing Bridge
Built By Chicago & North Western Railway
Contractor Unknown
Currently Owned By Canadian National Railway
Length 1,560 Feet Total, 195 Foot Main Span
Width 1 Track
Height Above Ground 40 Feet (Estimated)
Superstructure Type Warren Pony Truss and Deck Girder
Substructure Type Stone Masonry, Concrete and Steel Tower
Date Built 1905 and 1915
Traffic Count 2 Trains/Day (Estimated)
Current Status In Use
C&NW Bridge Number U-104
Significance Regional Significance
A brief history of the Chicago & North Western "Shoreline Route" from Milwaukee to Green Bay:


08/20/21


This bridge is by far the largest crossing of the Fox River in Green Bay. It is a large warren pony truss with riveted connections, sitting on stone piers and approached by numerous deck girders.
Built in 1905 and extended, the bridge features a continuous warren pony truss, which requires a specific engineering skill to balance the weight. The span consists of 13 panels, with riveted connections. The bridge also contains 16 deck girder spans, making for a very long approach.
Currently, the bridge shares a design with the Kaukauna Swing Bridge and the Princeton Trail Bridge
These bridges were built between 1901 and 1905, mainly by King Bridge Company, and there may have been more at one time. However, it could have been a Fox River specific design.
The western five spans and the eastern span were added in 1915 to replace wooden approaches. These spans use concrete and steel tower piers, while the 1905 portions use stone.
Overall, the bridge appears to remain in fair to good condition.

Historic Photo
Historic photo of the bridge

The author has ranked this bridge as being regionally significant, due to the unique pony truss design.
The photo above is an overview. The bridge can be seen from nearby roads.

Fox River Railroad Bridges
Upstream Kaukauna Swing Bridge
Upstream North Channel Schultheis Street Rail Bridge
Downstream Porlier Street Swing Bridge

Citations

Source Type

Source

Build Date Chicago & North Western Railway Historical Society Archives
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele



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