SR-121 At Sarco Creek Bridge Long-Term Closure Starts June 2017

Starting the week of June 5, 2017, Caltrans will begin demolition of the Sarco Creek Bridge (Bridge #21-0008) on State Route-121 (SR-121). The bridge is located on Silverado Trail (SR-121) between Hagen Road and Trancas Street just northeast of Downtown Napa. The SR-121 (Silverado Trail) will be closed at the site of the Sarco Creek bridge for approximately 6 months.
This project proposes to construct a new bridge over the Sarco Creek, because the existing bridge foundation has been scoured and is in need of replacement.
Sarco Creek Bridge Long-Term Closure
For demolition and during new bridge construction, northbound and southbound SR-121 at the Sarco Creek Bridge will be closed continuously until the new bridge is built and opened to traffic. Closure of SR-121 and construction is scheduled to begin in the week of June 5, 2017 and is expected to be completed by end of 2017. 
Detour Route-Northbound SR-121 At Sarco Creek Bridge
During construction of the new Sarco Creek Bridge, motorists traveling on northbound SR-29 towards Yountville or Lake Berryessa will be detoured at the SR-29/SR-221 Interchange. From the SR-29/SR-221 interchange, motorists will be detoured onto northbound SR-29, eastbound to Trancas Street then re-enter northbound SR-121 from Trancas Street.
Detour Route-Southbound SR-121 At Sarco Creek Bridge
During construction, motorists traveling on southbound SR-121 towards Vallejo and San Francisco will be detoured at Trancas Street on SR-121. Motorists will travel westbound on Trancas Street, southbound on SR-29 and continue on southbound SR-29 towards Vallejo and San Francisco. 
All work is weather dependent.  Motorists should expect delays and watch for detour signs and flaggers.  The CHP will assist with traffic control.
Construction Zone Activity
Residents and businesses near the bridge may temporarily experience increased noise and some dust during demolition and construction. Crews will work to complete the work in a safe and timely manner. Caltrans thanks you for your patience as we work to maintain California’s bridges and highways.
Get additional project information:
Or follow us on Twitter:
For more information call or email:
Vince Jacala, Caltrans Public Information Officer or 510-286-5206