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, adamron@napasan.com

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 September 28th, pipeline installation will take place on South Coombs Street. Tunneling work will continue along Freeway Drive in the area of Laurel Street/Kilburn Avenue. Pipeline installation will continue on Freeway Drive from the Laurel Street/Kilburn Avenue area to First Street.  Pipeline installation will begin along Spruce Street. Parking restrictions and traffic delays should be expected in all these areas. If possible, use an alternate route to avoid these construction zones.  

Preparation for tunneling will occur on the east side of Old Sonoma Road near Highway 29.

During the week of October 5th, pipeline installation work will continue on Spruce Street and Franklin Street.  Pipeline installation will continue along Freeway Drive from Laurel Street/Kilburn Avenue to First Street. Tunneling work will take place on Freeway Drive in the vicinity of Laurel Street/Kilburn Avenue.  Please plan for traffic delays and parking restrictions in all these areas. If possible, use an alternate route to avoid these construction zones.  

Preparation for tunneling will continue on the east side of Old Sonoma Road near Highway 29.

September 28th Browns Valley Project Current Construction Location Map


Summer 2020 Sewer Rehabilitation Project

Project Manager: Simon Kobayashi, skobayashi@napasan.com

Project Background: The Summer 2020 Sewer Rehabilitation Project project is essential to reduce the amount of maintenance calls and the potential for sewer overflows in your area and is necessary for the operation of our sewer system. 

Nu-Line Technologies, Inc. will begin construction in April and continue through October. All work will be done in compliance with the Construction Site Requirements set forth in the Napa County Shelter-in-Place Order to ensure worker safety.

The five primary project areas are: Pear Tree Lane, Redwood Road, Jefferson Street, the Old Sonoma Road Highway Crossing, and Browns Valley Road. The project areas were 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 340 sewer laterals will be repaired or replaced as part of this project. Through this project, 5.6 miles of pipeline (approximately 2.1% of the total sewer system) will be rehabilitated or replaced. 

As always, NapaSan will work to minimize negative impacts to pavement conditions whenever possible throughout this project. Wherever possible, pipelines will be rehabilitated using cured-in-place pipe, which is less invasive to streets than pipe bursting or open cut methods. Trenchless methods also minimize costs, construction time, and traffic disruptions compared to traditional open-cut trenching. 

Current Construction Location: From September 21st to October 2nd, sewer rehabilitation work will take place on 1st Street between Laurel Street and Chelsea Avenue and on Soscol Avenue near Pueblo Avenue.


Pear Tree Lane Project Area Map

Summer 2020 Collection System Rehab Jefferson Street Area Map

Summer 2020 Collection System Rehab Project Browns Valley Road Area Map

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