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Chain of Rocks Canal Bridge

Chain of Rocks Canal Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: November 3, 2013

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Key Facts

Facility Carried / Feature Intersected
Chain of Rocks Road (Historic US-66) Over Chain of Rocks Canal
Location
Granite City: Madison County, Illinois: United States
Structure Type
Metal 16 Panel Rivet-Connected Modified Polygonal Warren Through Truss, Fixed and Approach Spans: Metal Continuous 8 Panel Rivet-Connected Warren Deck Truss,
Construction Date and Builder / Engineer
1949 By Builder/Contractor: Bushman Construction Company

Technical Facts

Rehabilitation Date
1999
Main Span Length
463 Feet (141 Meters)
Structure Length
2,368 Feet (722 Meters)
Roadway Width
17.7 Feet (5.39 Meters)
Spans
1 Main Span(s) and 18 Approach Span(s)
NBI Number
60006814297

Historic Significance Rating (HSR)
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Bridge Documentation

View Archived National Bridge Inventory Report - Has Additional Details and Evaluation

This bridge has a construction date of 1946-1949. However, because of the widespread use of lattice and v-lacing on the members of the bridge which are almost exclusively composed of built-up beams, the bridge looks more like it dates to the 1920s or 1930s. The bridge has two areas of historic and technological significance, relating to its truss spans. The main through truss span is historically significant for its large 463 foot span. Its truss configuration is also unusual, as it is a polygonal Warren truss bridge, but is subdivided in the manner that a Pennsylvania truss would be. The main span is flanked by deck truss spans which are also historically significant as uncommon examples of continuous deck truss spans. Located at each end of the main span, the spans are configured as three span continuous trusses with a variable depth bottom chord. It is particularly unusual to see continuous deck truss spans of this design functioning as approach spans. The bridge is completed with a series of steel stringer approach spans at the ends of the bridge.

This bridge was once part of US-66 and a major travel corridor over the Mississippi River. However, today, the primary use of this bridge is to access the main Chain of Rocks Bridge which was part of this same travel corridor but is today preserved for non-motorized use only. This canal bridge in contrast remains open to vehicular traffic, but it only serves one lane traffic, which is controlled by stoplights at the ends of the bridge. The remainder of the bridge roadway is devoted for non-motorized use.

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Photo Galleries and Videos: Chain of Rocks Canal Bridge

 
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Bridge Photo-Documentation
Original / Full Size Photos
A collection of overview and detail photos. This gallery offers photos in the highest available resolution and file size in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
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Bridge Photo-Documentation
Mobile Optimized Photos
A collection of overview and detail photos. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
View Video
CarCam: Eastbound Crossing
Full Motion Video
Note: The downloadable high quality version of this video (available on the video page) is well worth the download since it offers excellent 1080 HD detail and is vastly more impressive than the compressed streaming video. Streaming video of the bridge. Also includes a higher quality downloadable video for greater clarity or offline viewing.
View Video
CarCam: Westbound Crossing
Full Motion Video
Note: The downloadable high quality version of this video (available on the video page) is well worth the download since it offers excellent 1080 HD detail and is vastly more impressive than the compressed streaming video. Streaming video of the bridge. Also includes a higher quality downloadable video for greater clarity or offline viewing.

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Maps and Links: Chain of Rocks Canal Bridge

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