State of California • Department of Transportation




State Route 121-Between State Route 128 and Wooden Valley Road

Closed Until Further Notice-Storm Damage


3/25/2016 UPDATE: Important update from Caltrans District 4:

State Route 121 (SR-121) in Napa County, California is set to reopen after a section of the roadway was damaged during heavy rain storms earlier this month.

The damaged section of SR-121 between Wooden Valley Road and Circle Oak Drive in rural Napa County had been closed since March 13 when heavy rains undermined the northbound SR-121 traffic lane. Crews are scheduled to activate temporary traffic signal lights just north and south of the damaged roadway on Friday, March 25 at 6:00 PM. Temporary traffic signals will allow northbound and southbound SR-121 motorists to pass the erosion site by alternating use of the existing southbound SR-121 lane. Motorists are required to make a complete stop when the traffic signal lights are red. Drivers may also encounter additional flaggers and heavy construction equipment in area as permanent repairs to the northbound SR-121 lanes continue.

Please drive with caution and expect delays of up to 5-10 minutes.‪#‎BeWorkZoneAlert



NAPA COUNTY– State Route 121 (SR-121) in Napa County will remain closed until further notice for emergency roadway repairs. The closure is located on SR-121 between SR-128/Capell Valley Road and Wooden Valley Road. SR-121 will remain closed while crews begin repairs and determine long-term traffic plans after the roadway was undermined during this weekend’s storm. Caltrans will make an announcement as soon as additional information is available.

SR-121 Detours

Westbound SR-128 motorists headed to southbound SR-121 will be detoured to westbound SR-128 to SR-29. Motorists from Napa wanting to avoid the closure are advised to use northbound SR-29 to eastbound SR-128. Motorists from Wooden Valley Road will be detoured to southbound SR-121 to northbound Sr-29, then eastbound SR-128.

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Caltrans appreciates your patience as we work to repair the highway.  



                            (Photo courtesy of Caltrans, March 14, 2016)                                              


SR-121 roadway in Napa County damaged during weekend storm.

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