NapaSan Construction Zones

apaSan 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. 

Summer 2019 Sewer Rehabilitation 

Project Manager: Email Karl Ono, Associate Engineer, 707-258-6013

NapaSan will be working on a sewer rehabilitation project throughout the city as part of the ongoing effort to replace aging 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.  The areas with high infiltration where work will take place were identified through inspections of pipeline conditions regularly conducted by NapaSan. The project areas where pipes will be rehabilitated or replaced are highlighted on this map.  

Extensive paving coordination efforts were undertaken during the design of this project. A large portion of the project is situated within a County "pocket" area, so NapaSan and County Public Works staff have agreed to a partnership, through which the County maintained streets in the project area will be resurfaced as part of this project. This approach will minimize impacts to the community by completing underground utility rehabilitation/replacement and street resurfacing within the same construction season.

Because the project area also includes streets within the City limits, NapaSan and City of Napa staff have also been working in coordination. Sewer mains within streets that are in good condition will be rehabilitated using cured-in-place pipe, which is less invasive to streets than pipe bursting or open cut methods. Trenchless methods are utilized whenever possible because they minimize costs, construction time, and traffic disruptions compared to traditional open-cut trenching.  

Approximately 615 sewer laterals will be repaired or replaced as part of this project.  Through this project, 5.9 miles of pipeline (approximately 2.2% of the total sewer system) will be rehabilitated or replaced.  The construction will take place in phases between mid-February and October of 2019.  

Current Construction Location: During the week of August 26, sewer rehabilitation work will take place on South Terrace Drive (south of Shetler), Shurtleff Avenue (south of Shetler), and Marshall Avenue.  

Paving on County maintained streets has been completed.  However, some follow-up work is expected to occur over the next two weeks, including adjusting utility covers to grade and installation of striping and pavement markings.  

In the upcoming weeks, sewer rehabilitation will take place on Tejas Avenue and street restoration will occur on South Terrace Drive.