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Freeport Bridge

   


Freeport Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: April 6, 2013
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Key Facts

Facility Carried / Feature Intersected
Freeport Bridge Road Over Sacramento River
Location
Sacramento: Sacramento County, California and Yolo County, California
Structure Type
Metal Rivet-Connected Pratt Through Truss, Movable: Double Leaf Bascule (Heel Trunnion) and Approach Spans: Metal 10 Panel Rivet-Connected Warren Pony Truss, Fixed
Construction Date and Builder / Engineer
1929 By Builder/Contractor: C. J. Nystedt and Engineer/Design: Strauss Bascule Bridge Company (Strauss Engineering Company) of Chicago, Illinois

Technical Facts

Rehabilitation Date
1955
Main Span Length
226 Feet (68.9 Meters)
Structure Length
652.6 Feet (198.9 Meters)
Roadway Width
21 Feet (6.4 Meters)
Spans
3 Main Span(s) and 2 Approach Span(s)
NBI Number
24C0001

Historic Significance Rating (HSR)

Bridge Documentation

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

This bridge is an impressive example of a Strauss type heel-trunnion bascule bridge. This particular example has an unusual detail especially compared to the few other heel-trunnion bridges found in this region of California. The towers for each of the counterweights normally assumes a  triangle shape under the counterweight. In many cases, including with the other heel-trunnion bascule bridges in this region, the tower (just by chance) also functions as a very short span of the bridge. On the Freeport Bridge however, the counterweight tower has been enlarged and extended so that it is much longer and takes on the form of a Pratt through truss. As a result, the counterweight tower also functions as an approach span of substantial length. Doing this would either reduce the number of approach spans the bridge needed, or reduced the length of other approach spans. As such, this extension of the counterweight tower was likely a purposeful decision to achieve one of those benefits.

The bridge also includes a fixed Warren pony truss approach span (101 feet long), as well as a couple stringer spans. These spans are not original to the bridge. The Warren pony truss was added to the east end of the bridge in 1938. In 1955 an extremely rare and unusual feature... two Kingpost truss spans... were removed and replaced with the steel stringer spans.

Although the bridge tender house is not original (estimated date ca. 1997), the remainder of the bridge appears to be largely unaltered and thus the bridge's historic integrity is good. Charles W. Deterding was the county engineer when this bridge was built.

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Photos and Videos: Freeport Bridge

Available Photo Galleries and Videos

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Bridge Photo-Documentation
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A collection of overview and detail photos. For the best visual immersion and full detail, or for use as a desktop background, this gallery presents the photos for this bridge in the original digital camera resolution.
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Bridge Photo-Documentation
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A collection of overview and detail photos. View the photos for this bridge in a reduced size which is useful for mobile/smartphone users, modem (dial-up) users, or those who do not wish to wait for the longer download times of the full-size photos. Alternatively, view this photo gallery using a popup slideshow viewer (great for mobile users) by clicking the link below.
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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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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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