Listed below are projects that are currently in progress. View recently completed projects.

SVCSD Treatment Plant Influent Effluent Pumping and Piping Upgrade

The Work consists of the replacement of the eight existing influent and effluent pumps housed in the existing building basement of the Sonoma Valley County Sanitation District’s Treatment Plant Influent/Effluent building, all exposed influent suction and discharge piping, valves, flow meters and associated electrical and control equipment located at 22675 8th Street East in Sonoma, California.  The Work includes the demolition of all existing pumps, piping, electrical and control equipment within the building; installation of five new 85 horsepower dry pit submersible influent pumps and associated piping and valves within the existing building basement; construction of a new exterior effluent pump station adjacent to the building with three 250 horsepower vertical turbine pumps in sub-grade pump cans with associated piping and valves; installation of two slide gates in the existing exterior headworks channels; modifications to the existing exterior influent and effluent wet wells; installation of eight variable frequency drives (VFDs) and back-up reduced-voltage soft starters (RVSS) in the building; installation of a programmable logic controller (PLC) and associated equipment; plc programming and supervisory control and data acquisition (SCADA) integration to control the new equipment; and associated civil site work adjacent to  the building.

Date Started: August, 2024

Contract Amount: $10,658,200

Contractor: W.M. Lyles & Co., Rockin, CA

Sonoma Valley County Sanitation District Sewer Trunk Main Replacement Phase 5A

The Work consists of construction of the sewer trunk main replacement located between the north end of Happy Lane and the intersection of Lichtenberg Avenue and Johnson Avenue in the unincorporated area of Boyes Hot Springs, California.  The Work includes the replacement of approximately 3,100 linear feet of 21-inch diameter trunk sewer main with the installation of 24-inch diameter trunk sewer main, replacement of 6-inch side sewer main with 8-inch diameter side sewer main, trenchless installation of trunk sewer, associated manholes, and re-connection of existing connecting sewer lines.

Date Started: June, 2024

Contract Amount: $6,334,708

Contractor:  Mountain Cascade, Inc. Livermore, CA

Santa Rosa Plain Water Supply Sebastopol Road Well Activation

The Work consists of construction of improvements to the Sebastopol Road well located at 5590 Sebastopol Road, Santa Rosa, California.  The Work includes installation of the following items: aquifer recharge valve; approximately 300 linear feet of 12-inch diameter ductile piping; refurbished vertical turbine well pump and pump column piping; fiberglass buildings; chemical dosing systems; pump to waste systems; control valves; instrumentation; and related mechanical, electrical, and controls equipment, including integrating and commissioning modes of operation for long-term operation of the well.

Date Started: April, 2024

Contract Amount: $3,102,798

Contractor: TerraCon Constructors, Inc., Healdsburg, CA 

Cotati Tank No. 1 and Kastania Tank Recoat

The Work consists of removal and replacement of protective coatings on Cotati Tank No. 1 located at 1190 West Sierra Avenue and Kastania Tank located at 3543 Kastania Road, in unincorporated areas of Cotati and Petaluma. The Work includes repairing corroded structural steel features within the tanks, installing lateral bracing, applying protective coating to tank interiors, painting tank exteriors, installing new cathodic protection systems for long term corrosion prevention, and other miscellaneous improvements.

Date Started: May, 2023

Contract Amount: $6,450,000

Contractor: AMP United, LLC.,  Dover, NH

Sonoma Valley County Sanitation District Treatment Plant Seismic Retrofit of Secondary Clarifiers 

The Work consists of seismic retrofit of secondary clarifiers at the SVCSD Treatment Plant, located at 22675 8th Street East, in the City of Sonoma, California. The Work includes replacing the existing internal secondary clarifier mechanisms in their entirety and modifying the reinforced concrete foundations, with the new system designed to withstand governing seismic and hydrodynamic sloshing loads.

Date Started: March, 2023

Contract Amount: $6,479,864

Contractor: C. Overaa & Co., Richmond, CA 

Ely Booster Station Hazard Mitigation

The Work consists of construction of Owner’s Ely Booster Station Hazard Mitigation located on Ely Road North in an unincorporated area of Petaluma.  The Work includes demolishing and replacing existing structures and appurtenances, including the switchgear, pump motor housing structure, valve actuators, and anchoring equipment, and elevating and sealing the electrical and mechanical appurtenances, including the existing generator, above the 500-year floodplain.

Date Started: June, 2022

Contract Amount: $2,666,666

Contractor: Royal Electric Company, Sacramento, CA