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CA-4 Middle River Bridge

CA-4 Middle River Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: April 5, 2013

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Key Facts

Facility Carried / Feature Intersected
CA-4 Over Middle River
Location
Rural: San Joaquin County, California: United States
Structure Type
Metal Rivet-Connected Pratt Through Truss, Movable: Swing (Center Pier) and Approach Spans: Metal 6 Panel Rivet-Connected Warren Pony Truss, Fixed
Construction Date and Builder / Engineer
1915 By Builder/Contractor: American Bridge Company of New York, New York

Technical Facts

Rehabilitation Date
1975
Main Span Length
130 Feet (39.62 Meters)
Structure Length
547 Feet (166.73 Meters)
Roadway Width
19.7 Feet (6 Meters)
Spans
1 Main Span(s) and 3 Approach Span(s)
NBI Number
29 0049

Historic Significance Rating (HSR)

Bridge Documentation

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

This bridge is one of several attractive historic swing bridges on CA-4. This example stands out for its combination of through and pony truss spans, which create a nice contrast that draws visual attention to the main swing span. The bridge retains good historic integrity. The American Bridge Company built the truss spans, however a plaque lists Tibbitts-Pacific Company of San Francisco, California as the on-site contractor for the bridge. The design was undertaken by F. E. Quail, San Joaquin County Surveyor. Along with the CA-4 Old River Bridge this is one of the two oldest unaltered highway swing bridges in California.

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Photo Galleries and Videos: CA-4 Middle River 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
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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: 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.
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: 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.

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