Trancas Milliken Stone Bridge



Trancas Street/Milliken Creek Stone Bridge

 Milliken Creek bridge after collision
JL Sousa photo courtesy of The Napa Register

This historic bridge was substantially damaged in a collision the evening of May 5, 2014.  This bridge carried traffic which was eastbound on Trancas Street, intending to turn right and travel southbound on SR 121 Silverado Trail.


A large section of the stone railing on the south side was separated from the bridge and the pieces fell in the creek bed below.  Another major section was significantly disturbed but is still in position.  Crews have closed the bridge to traffic and all traffic is now routed through the adjacent “all-way stop” intersection.

The historic bridge will be restored to its pre-damaged condition as much as possible.  Crews retrieved the stones from the creek bed in order to do so.  Additional similar stones are available in storage from other bridges which were demolished long ago, in case any replacements are needed.

The first priority while work is in progress at the bridge site is for public safety.  As such, the bridge will remain closed to vehicular traffic until further notice.  Crews have made arrangements to secure the“gap” in the railing so that pedestrians and bicyclists may use this bridge.

Steps have been taken to improve operation of the all-way stop intersection.  County engineers implemented a plan for reconfiguring the lane striping to account for the changed patterns of movement in the absence of the damaged bridge.  

Although the historic stone bridge will be restored, it is not yet known whether it will be feasible to return it to service for vehicular traffic.  There are significant concerns regarding the cost of reconstructing the bridge to current structural requirements, while maintaining the historic character and respecting the surrounding natural environment.

The County is currently reviewing proposals for engineering experts to evaluate the condition of the bridge and the feasibility of various alternative strategies for going forward.  The alternatives include:

  1. Restore to full vehicular use, following full historic preservation requirements
  2. Restore to vehicular use for cars, with a weight limit restricting truck traffic
  3. Restore for pedestrian and bicycle use only


People are invited to submit comments and suggestions to