NSD Dedicates New Influent Pump Station

December  16, 2015

Napa, California –

Today the Napa Sanitation District (NSD) proudly dedicated the newly constructed influent pump station.  The increased reliability and capacity of the pump station will help the District process huge increases of wastewater that occur during large storm events, and reduce the possibility of overflows.

“The old influent pump station was unreliable, and had to operate at full capacity during storm events,” stated Tim Healy, General Manager of Napa Sanitation District.  “The increased reliability, capacity, and safety of the new pump station give us the confidence that we can meet current and future capacity needs.”  The increased reliability of the new pump station helps Napa Sanitation District protect water quality and the Napa River.  Napa Mayor and Napa Sanitation District Board Chair Jill Techel said, “By building this new pump station and increasing the amount of wastewater that can flow through the system, we have taken a great step to reduce the chance of sewer overflows and protect the health of the Napa River.”

Construction of the new pump station began in 2013 and was finished in November 2015. The new pump station, with a construction cost of $15 million, has a submersible pump configuration and was built next to the old pumping station.  The old station was over 40 years old and had a firm capacity of 35 million gallons per day (GPD). Firm capacity is a measure of the ability of the station to process flow with the largest pump out of service.  The current firm capacity of the new pump station is 60 million GPD, but the station was built with the possibility of expansion to meet future demand.   By adding additional pumps, the firm capacity of the new pump station can reach 90 million GPD. Normally, NSD processes about 6 million gallons of wastewater per day. However, because of cracks, roots, failed joints, and illegal stormwater connections to the sewers, the sewers see a significant increase in the inflow and infiltration of stormwater during heavy rain events.

The screen removal system at the new pump station that removes unwanted debris is automatic and continuous whereas the old station required manual screen cleaning and created unsafe working conditions. Additionally, the new submersible pumps can be raised to be maintained at surface level, which makes maintenance safer and easier to complete.

Napa Sanitation District (NSD) provides wastewater collection, treatment, and distribution services to the residents and businesses in the City of Napa, Silverado Country Club, the Napa County Airport and several adjacent unincorporated areas. NSD also provides recycled water service to portions of southern Napa County. Covering 20 square miles, NSD has been serving the community since November 1945. For further information about the NSD, please see www.NapaSan.com.