|November 2013 (38.30083 Degrees, -122.29333 Degrees) Jefferson Street Bridge
The Jefferson Street Bridge (21C0010) was originally a closed spandrel stone arch but it was widened on its upstream side with an open spandrel concrete arch and on its downstream side with a three span 'T' beam structure on pile extensions.
The Jefferson Street Bridge is 99 ft long with a 49 ft center span. It's 58 ft wide but this was considered inadequate for 14,000 vehicles a day and the bridge received a sufficiency rating of only 56 and it was appraised as structurally obsolete.
Jefferson Street was so densely bordered with houses and Napa Creek was so densely bordered with vegetation that I couldn't get very close to the bridge. However, Craig Philpott also took some photographs and he was able to get closer to this bridge.
Napa County, California Bridges: Jefferson Street Bridge across Napa Creek by Mark Yashinsky is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.