This bridge is an uncommon example of a pin-connected Parker truss. It also is noted for its multi-span configuration, with three main spans. The ends of the bridge also have concrete approach spans with balustrade
railings. The bridge truss configuration is unusual in that with the two center panels of the truss, the diagonal members pass through two panels instead of just one which is the case with the other panels on the truss. The center panels
make the bridge look like a Pennsylvania truss, although the other panels do not display this design, which is why the bridge is being classified as a Parker and not a Pennsylvania truss. The truss retains original lattice railings. The
good news with this bridge is that Sonoma County apparently does not plan to demolish and replace the bridge, since the bridge is listed as being slated for seismic retrofit when funds become available.
The bridge was built by the American Bridge Company with the Foundation Company listed as a contractor (likely for the substructure). The bridge was designed by Sonoma County Engineer W. L. Hook.
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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.