NapaSan Construction Zones

NapaSan conducts a regular sewer system maintenance program. You may see us on the streets, repairing, replacing, or cleaning sewer lines or recycled water pipes. We apologize for any inconvenience and appreciate your patience while we work to keep our system operating effectively! 

Refer to the information below to find out where our current construction projects are happening. If you have any questions or concerns, please call NapaSan at (707) 258-6000. 

Browns Valley Trunk Sewer Project

Project Manager: Andrew Damron,

Project Background: The Browns Valley Trunk Project is designed to intercept wastewater from Browns Valley and Southwest Napa and divert the flow away from sewer lines that are over capacity via a new 3-mile pipeline that will deliver the wastewater to NapaSan for treatment.  For additional background information, visit our Browns Valley Trunk Project page.   

Current Construction Location:    

During the week of October 18, sewer pipeline replacement will be performed on Oran Court. Manhole raising will take place along Freeway Drive from the Laurel Street/Kilburn Avenue intersection, First Street, and Browns Valley Road.

During the week of October 25, manhole raising will be completed along Freeway Drive, First Street, and Browns Valley Road. Manhole raising will begin on Sycamore Street, Old Sonoma Road, and Freeway Drive up to the Laurel Street/Kilburn Avenue intersection.  Striping and marking work will be performed along the full project alignment.  Trench paving will take place on South Coombs Street.  

10.18.21 Browns Valley Trunk Sewer Project Construction Location Map

2021 Collection System Rehabilitation Project

Project Manager: Karl Ono,

Project Background: The 2021 Collection System Rehabilitation Project is essential to reduce the amount of maintenance calls, decrease the potential for sewer overflows in the project area,  and improve the operation of our sewer system. 

KJ Woods Construction, Inc. is expected to begin construction in March 2021, and work is planned to continue through October 2021. All work will be done in accordance with County and State public health guidelines related to the COVID-19 pandemic.

The project area was selected due to the deteriorated condition of aging sewer pipes. NapaSan will be repairing or replacing these aging sewer pipelines that allow stormwater and groundwater to infiltrate into the sewer system. Reducing this infiltration helps to decrease the possibility of sewer overflows and spills. Approximately 430 sewer laterals will be repaired or replaced as part of this project. Through this project, 4.2 miles of pipeline (approximately 1.6% of the total sewer system) will be rehabilitated or replaced. 

As always, NapaSan will work to minimize negative impacts to businesses and residents whenever possible throughout this project. Wherever possible, pipelines will be rehabilitated using trenchless methods, which minimize costs, construction time, and neighborhood disruptions compared to traditional open-cut trenching. 

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Current Construction Location:  

During the week of October 11, sewer rehabilitation work will take place on 3rd Street between Randolph Street and Coombs Street.

During the week of October 18, sewer lateral rehabilitation work and site cleanup and restoration will take place throughout the project area.

Map of 2021 Collection System Rehabilitation Project Area