Craig: I usually do add a link to a project website when such a website exists and has worthwhile information. In the case of Sonoma County, I updated the status of a couple bridges based on information I found buried in a 2009 report. The report doesn't really offer much more in the way of detail. It can be downloaded at this link: http://www.sonoma-county.org/tpw/pdf/bridge_report/bridge_re...
Also, I think it was a few weeks ago I also did a sweep of a bunch of Public Works pages for various California counties to check on the status of bridges since it seemed like nobody had done anything like that for California for a long while. Unfortunately, I did find a number of doomed bridges and I updated BridgeHunter listings with my findings. If you want to know more about any of those projects, you can always check the respective public works websites... but again with a few exceptions many offer little information beyond a statement that the bridge is to be replaced.
Finally, the reason I have been fussing around with California is because I am adding an excellent photo-documentation of select bridges in the counties in and around the San Francisco Bay area over at HistoricBridges.org, representing my first visit to this state. As the summer goes on, be sure to come on over and see what I have been adding!
Nathan, I sure appreciate your tracking of county repair plans for this bridge, and others like it, and I wonder if you have any specific project links that you can post as you research.
Craig: Looks like this additional report might have a little more info, although the timeline is outdated, on expected costs for the projects: http://www.sonoma-county.org/gs/pdf/cpp_2009_2014.pdf