Oldest Bridge in the State Highway System

[Max Rockatansky]

I got to thinking after writing the CA 271 blog today and noting the South Fork Eel River Bridge dates to 1917; what is the oldest bridge still active in the State Highway Inventory?  I would imagine that the answer likely is a 1909 First State Highway Bond Act Road (proven wrong already through two edits to this post) but I could be wrong given those generally ended up being major transportation corridors.  Thus far the oldest active bridge I've found on a State Highway is the West Union Creek Bridge on CA 84 from 1903 (this was a fairly modern adoption by way of Legislative Route 107).

http://bridgehunter.com/ca/san-mateo/350044/#Map

Conversely a secondary question would be what is the oldest active state highway bridge that was built as part of a state facility?  The Lion Canyon Creek Bridge wasn't built by the Division of Highways but was absorbed into State Maintenance by way of Legislative Route 80 being defined in 1933. 

[hotdogPi]

Is this a California thread? If not, there's one in Ipswich, MA from 1764.

[Max Rockatansky]

Is this a California thread? If not, there's one in Ipswich, MA from 1764.

For the moment, I wouldn't mind if a MOD spun it off into a General Topic.  Might get really interesting if the Northeastern States are involved.