Route 29 Paving from St Helena to Calistoga

Traffic Advisory: Motorists to expect one-way traffic control as road repair project is set to begin on State Route 29 from St. Helena to Calistoga starting at 7:00 PM, Wednesday, July 6, 2022

Caltrans is set to begin a project to repave a 7.6-mile section of State Route 29 in Napa County between the York Creek Bridge in St. Helena and Lincoln Avenue in Calistoga.  Several sections of old or damaged guardrail and a few traffic signs will also be replaced during the project.  

A PG&E project to replace a gas line is underway in the corridor and must be completed before Caltrans can begin work.  Meetings between Caltrans and PG&E have yield an estimated start date in early July 2022. The project will take about three months to complete. 

During the project the top layers of pavement will be ground away and replaced with fresh asphalt. Work will be done at night. 

Argonaut Construction is the apparent low bidder on the project with a winning bid of approximately $7.2 million. 

Other Related Projects within the area:

PG&E: State Route 29 St. Helena to Calistoga natural gas pipeline testing and upgrades. Helena to Calistoga natural gas pipeline testing and upgrades (

NVTA: Napa Valley Vine Trail

For more information about the project, contact Pedro Quintana:

St Helena Map