Recently Completed Projects

Listed below are projects that have been completed in the past few years. View current projects in progress.

Dry Creek Habitat Enhancement Phase III Part 3

Date Started: 7/15/2020

Contract Amount: $3.7M

Contractor: Hanford Applied Restoration & Conservation, Petaluma, CA

Description: The Work includes excavation of backwater alcoves and side channels into the floodplain areas of Dry Creek, installation of habitat and stabilization structures composed of logs and boulders, driving logs into the ground to stabilize log structures, stabilization of banks, planting and replanting riparian vegetation and trees, removal of non-native riparian vegetation, construction of in-channel features such as boulder fields and riffles, dewatering during construction, isolation of Work areas from the creek, construction of driveway access from West Dry Creek Road, and replacement of storm drain pipe.

 



Mirabel Inflatable Dam Fabric Replacement

Date Started: 5/24/2021

Contract Amount: $1.8M

Contractor: Power Engineering Construction Company,  Alameda, CA

Description: The Work consists of rubber dam fabric replacement at Owner’s Mirabel Inflatable Dam located at 10290 Westside Road, near the unincorporated town of Forestville, Sonoma County, California.  The Work includes the removal of the existing rubber dam fabric and installation of approximately 180 lineal feet of Owner-furnished replacement rubber dam fabric. The Work also includes construction of a coffer dam upriver and downriver, in conjunction with a dewatering system, to facilitate the removal of river channel material, construction of vegetated rock slope stabilization, and installation of the rubber dam fabric.  




Santa Rosa Creek Vortex Tube

Date Started: 6/21/2021

Contract Amount: $1.1M

Contractor: Granite Construction Company, Ukiah, CA

Description: The Work consists of rehabilitation of Owner’s vortex tube located at the Santa Rosa Creek diversion structure beneath Montgomery Drive, Santa Rosa, California.  The Work includes rehabilitation of approximately 112 linear feet of 8-foot diameter reinforced concrete pipe (vortex tube), replacement of approximately 21 linear feet of cast-in-place concrete transitional section (transition area), trenchless installation of approximately 140 linear feet of 36-inch diameter welded steel bypass pipe (bypass pipe), and approximately 160 linear feet of unlined trapezoidal channel to facilitate future inspection and maintenance.  



Dry Creek Habitat Enhancement Phase II Part 2

Date Started: August, 2018

Contract Amount: $3.5M

Contractor: McCullough Construction, Inc.,  Arcata, CA

Description: The Dry Creek Enhancement Project will construct low velocity habitat areas for juvenile Coho and Steelhead.  This portion of the project consists of work in Reach 14.  The work includes construction of side channels, riffles, backwaters and alcoves which will slow the speed of the water and create refuge for young fish.  The improvements are constructed in the floodplain areas of Dry Creek and include installation of habitat and stabilization structures are composed of logs and boulders, driving logs into the ground anchor structures, bank stabilization measures, planting of riparian vegetation and trees, removal of nuisance non-native riparian vegetation and construction of in-channel features such as boulder fields and riffles, dewatering during construction, and isolation of Work areas from the creek.





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Forestville Tanks Recoat

Date Started: August, 2019

Contract Amount: $1M

Contractor: Olympus & Associates, Inc. in Reno, NV.

Description: The Work consists of removal and replacement of protective coatings on two above-grade welded steel potable water storage tanks located in an unincorporated area of Forestville, California.  The Work includes the removal of internal epoxy coating, removal of loose exterior paint, recoating of the interior and exterior of the tanks, removal of existing cathodic protection system, installation of a new cathodic protection system, replacement of air vents, drain pipe replacement, overflow pipe modifications, cabinet removal, roof penetration repair, and the addition of an occupancy sensor.



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North Bay Water Reuse Program- Sonoma Valley County Sanitation District Treatment Plant - Pumping and Piping Upgrade

Date Started: November, 2016

Date Completed: August, 2018

Final Contract Amount: $2M

Contractor: TerraCon Constructors, Inc., Healdsburg, CA

Description: The Work consists of upgrades at the Sonoma Valley County Sanitation District Wastewater Treatment Plant outside the limits of the City of Sonoma.  The Work includes construction of approximately 3,000 linear feet of pipeline ranging from 12 to 18 inches in diameter, the addition of two vertical turbine pumps and one 1,980 gallon hydropneumatic bladder tank. Sitework also includes piping, vaults, electrical and instrumentation. 



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SPCSD Blackwell Tract Sewer System Replacement

Date Started: March, 2018

Date Completed: January, 2019

Final Contract Amount: $3.1M

Contractor:  TerraCon Constructors, Healdsburg, CA

Description:  The Work consists of construction of Owner’s South Park County Sanitation District Blackwell Tract Sewer System and Santa Catalina Way Water System Replacement Project located at Elsinore Way, Santa Barbara Drive, Santa Catalina Way, San Clemente Drive, San Domingo Drive, and portions of Moraga Drive in an unincorporated area of Santa Rosa. The Work includes the replacement of approximately 5,736-feet of 6-inch and 8-inch diameter vitrified clay and asbestos cement sewer pipe with new 8-inch diameter PVC sewer pipe, laterals and manholes.  The Work also includes replacement of approximately 565 feet of existing 4-inch diameter cast iron water main with a new 8-inch diameter PVC water main, and the installation of 6 new fire hydrants.



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Petaluma Aqueduct Cathodic Protection Upgrade

Date Started: April, 2018

Date Completed: December, 2018

Final Contract Amount: $1.3M

Contractor:  American Construction and Supply, Inc., Corte Madera, CA

Description:  The Petaluma Aqueduct Cathodic Protection (CP) Project installed an impressed current cathodic protection system along the length of the Petaluma Aqueduct, which runs from Santa Rosa to Petaluma.  An impressed current cathodic protection system prevents corrosion to the metal portions of the pipeline and may extend the life of the pipeline by up to 50 years.  The Work includes the installation of seven cathodic protection stations each consisting of a DC rectifier unit and deep well anode bed with cast iron anodes.  In addition, there are thirteen test stations that will be placed along the Aqueduct which will measure effectiveness of the CP system.  



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Dry Creek Habitat Enhancement Phase II, Part 1

Date Started: June, 2016

Date Completed: October, 2018

Final Contract Amount: $3,696,566

Contractor: McCullough Construction, Inc., Arcata, CA

Description:  The Work consisted of construction of habitat modifications within the Dry Creek Valley. The Work includes excavating backwater alcoves and side channels into the floodplain areas of Dry Creek and installation of stabilization structures composed of logs and boulders.  The banks were stabilized, riparian vegetation and trees were replanted and non-native vegetation was removed.  In-channel features include boulder fields and riffles which create a thriving environment for the fish of the Russian River.



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Dry Creek Habitat Enhancement Phase III, Part 1

Date Started: August, 2016

Date Completed: October, 2018

Final Contract Amount: $2,214,135

Contractor: McCullough Construction Inc., Arcata, CA

Description: The Work consisted of habitat modifications with the Dry Creek Valley along .75 miles of Dry Creek outside the City of Healdsburg.  Work includes excavating backwater alcoves and side channels into the floodplain areas of Dry Creek.  We installed habitat and stabilization structures composed of anchored logs and boulders and erosion control measures by seeding and planting of live stems and removal of non-native riparian vegetation.  These features create a thriving environment for the fish of the Russian River.



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Geyserville Sanitation Zone Treatment Plant Photovoltaic Project

Date Started: September, 2015

Date Completed: November, 2015

Final Contract Amount: $145,000

Contractor: Danlin Solar, San Rafael, CA

Description: The Work consists of construction of a 150 solar panel array which will produce 46 kW.  This is enough energy to provide 80% of the electricity needed to operate the Wastewater Treatment Plant.  This project is part of the Sonoma Water's initiative to develop a model for locally owned, cost effective renewable energy.



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North Bay Water Reuse Program - SVCSD Fifth Street East Recycled Water Pipeline Project

Date Started: July, 2016

Date Completed: June, 2017

Final Contract Amount: $2,033,135

Contractor: Argonaut Constructors, Santa Rosa, CA

Description: The Work consists of approximately 8,000 linear feet of recycled water mainline pipe, valves, appurtenances and service laterals.  The pipeline begins at the intersection of Watmaugh Road and Shainsky and extends east to Fifth Street. The project also includes extension of the pipeline to the City of Sonoma's Valley Oaks Park.



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Isolation Valves Seismic Hazard Mitigation

Date Started: August, 2016

Date Completed: December, 2017

Final Contract Amount: $4,507,588

Contractor: Ranger Pipelines, Inc., San Francisco, CA

Description: The Work consists of the installation of 14 intermediate butterfly isolation valves throughout Sonoma Water's 90 miles of water transmission pipeline outside and within the city limits of Cotati, Petaluma, Rohnert Park, Santa Rosa and Sonoma.  The Work includes appurtenances such as air valves, valve boxes, cathodic protection, temporary line stop technology and thrust restraint.



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Mirabel Fish Screen and Fish Ladder Replacement

Date Started: July, 2014

Date Completed: February, 2017

Final Contract Amount: $12,721,338

Contractor: F&H Construction, Lodi, CA

Description:  The Work consisted of construction of a vertical slot fish ladder, fish screen with 6 intake bays and viewing gallery with 400 square feet of viewing windows.  Work included a temporary dam and rock fish passage upstream of the Wohler Bridge, pipe pile foundation system, fish screen cleaning system with a vertical traveling brush and controller. Sonoma Water staff utilizes video cameras to count the fish moving through the ladder and we bring over 3,000 students per year to the viewing gallery as part of the Water Education Program.



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Westside Water Education Center

Date Started: October, 2014

Date Completed: July, 2016

Final Contract Amount: $2,108,766

Contractor: Diede Construction, Inc., Lodi, CA

Description: The Work consisted of construction of a water education building at 9703 Wohler Road and also included a new driveway entrance and parking area.  This facility is the field study site for Sonoma Water's Water Education Program.  Over 3,000 students visit the center each school year and learn about the connection between our drinking water and the Russian River, water quality parameters for endangered Russian River salmon and utilize the laboratory to discover the importance of water efficiency and aquatic life.



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Sonoma Valley County Sanitation District Agua Caliente Creek Crossing

Date Started: August, 2015

Date Completed: June, 2016

Final Contract Amount: $2,623,203

Contractor: TerraCon Constructors, Inc., Healdsburg, CA

Description: The Work consisted of replacing 620 linear feet of sewer trunk main, including removal and realignment of trunk main and removal of the above channel crossing of Agua Caliente Creek.  Work also included construction of 639 linear feet of HDPE pipe, 239 linear feet of siphon pipe and 133 linear feet of pipe rammed steel casing under Agua Caliente Creek.



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Procurement of Large Woody Debris

Date Started: February, 2016

Date Completed: August, 2016

Final Contract Amount: $885,694

Description: Sonoma Water purchased over 1,000 large woody debris units to be used in the Dry Creek habitat enhancement projects.  Species include Redwood, Douglas Fir and Eucalyptus. These logs and root wads will be used to create habitats that reduce water velocities for Coho salmon rearing in Dry Creek.  The Project is one component of the National Marine Fisheries Service's Russian River Biological Opinion, which is a federally mandated blueprint to help save endangered fish and preserve Sonoma Water's regional water supply.


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SPCSD West Robles Avenue Collection System Replacement Project

Date Started: May, 2016

Date Completed: July, 2016

Final Contract Amount: $292,160

Contractor: W.R. Forde Associates, Richmond, CA

Description: The Work consists of construction of approximately 440 feet of sanitary sewer main in West Robles Avenue.  The Work includes the excavation, backfilling and surface restoration for the construction of the sewer main. This includes several manholes, laterals and modifications to existing manholes.  Sonoma Water worked in conjunction with residents on West Robles Avenue to complete this Work quickly and mitigate disruptions.



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404 Aviation Boulevard Roof Replacement Project

Date Started: June, 2015

Date Completed: September, 2015

Final Contract Amount: $1,053,715

Contractor: Joseph Murphy Construction, Livermore, CA

Description: The Work consisted of roof replacement of a 63,000 square foot, actively occupied office bu8ilding in Santa Rosa.  The Work included the removal and replacement of existing roof and removal and reinstallation of existing photovoltaic panels.



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Service Center Parking Lot, Phase II

Date Started: October, 2015

Date Completed: June, 2016

Final Contract Amount: $275,632

Contractor: Siri Grading and Paving, Inc., Santa Rosa, CA

Description:  The Work consisted of construction of a parking lot at SCWA Service Center Facility. The Work included construction of a one-acre parking lot with lime treated subgrade, aggregate base wearing surface and lighting for Service Center staff.



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Russian River County Sanitation District Treatment Plant Biological Nutrient Removal

Date Started: September, 2013

Date Completed: March, 2014

Final Contract Amount: $2,509,660

Contractor: Auburn Constructors, Inc., Sacramento, CA

Description: Construction of a biological nutrient removal system at Russian River County Sanitation District’s treatment plant located at 18400 Neeley Road, Guerneville, California. Work includes the construction of baffle walls, pumping recirculation, micro diffuser aeration, blowers, mixers, motor control center, electrical panels, instruments, and controls.



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North Bay Water Re-Use Program - Sonoma Valley County Sanitation District

McGill Road Recycled Water Pipeline

Date Started: October, 2014

Date Completed: March, 2015

Final Contract Amount: $236,133

Contractor: TerraCon Constructors Inc., Healdsburg, CA

Description: The work consists of construction of a recycled water pipeline along McGill Road crossing Highway 12, outside the City of Sonoma.  The Work includes installation of approximately 750 linear feet of recycled water pipe in a range of sizes with steel casing under Highway 12.



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Dry Creek Habitat Enhancement Project, Phase II

Date Started: June, 2013

Date Completed: January, 2015

Final Contract Amount: $4,673,293

Contractor: Hanford Applied Restoration & Conservation, Sonoma, CA

Description: Construction of habitat modifications within the Dry Creek Valley along Dry Creek from approximately 1/2 mile upstream of Lambert Bridge Road to 1/2 mile downstream of Lambert Bridge Road near City of Healdsburg.  Work included habitat modifications, including new side channels, ponds, alcoves and rock riffles.  Enhancements were made to existing pools through selective grading, installation of woody debris, log jams and large boulders as anchor material.  New vegetation was planted and erosion control measures were put in place to maintain longevity of the project.



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Sonoma Valley County Sanitation District Biosolids Management Upgrade

Date Started: May, 2013

Date Completed: September, 2014

Final Contract Amount: $3,107,794

Contractor: KG Walters Construction Co., Inc., Santa Rosa, CA

Description: Upgrading the biosolids handling facility at the Sonoma Valley County Sanitation District Wastewater Treatment Plant located at 22675 8th Street East, Sonoma, California.  Work includes the installation of a new screw press and construction of new equipment and load-out building. Work also includes removal of an existing belt press and conveyor, electrical, and preparation and painting of pump room in the existing dewatering building.



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Mirabel Site Seismic Improvements

Date Started: December, 2013

Date Completed: August, 2014

Final Contract Amount: $1,493,600

Contractor: Hayward Baker, Inc., Santa Paula, CA

Description: Work includes clearing, grading, utility protection and relocation, soil densification through vibro replacement methods, and quality control testing.



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South Park County Sanitation District Gloria Drive – Meekland Court Collection System Replacement and Gloria Drive & Valerie Way Water Main Replacement

Date Started: October, 2013

Date Completed: September, 2104

Final Contract Amount: $3,013,360

Contractor: Ghilotti Construction, Inc., Santa Rosa, CA

Description: Work includes replacing approximately 6,570 feet of existing 6-inch and 8-inch sewer main pipe and appurtenant sewer laterals, manholes, and main line cleanouts with new 8-inch PVC sewer main and appurtenant sewer laterals, manholes, and main line cleanouts; replacing approximately 2,078 feet of existing 4-inch water main and appurtenant water services with new 8-inch PVC water main and appurtenance water services; and the addition of two new fire hydrants. Sewer-related Work is located on portions of Gloria Drive, West Avenue, Camellia Court, Valerie Way, Metaxa Court, Southwood Drive, Leo Drive, Meekland Court, Dutton Avenue, and Mathwig Drive and is within existing public sewer easements. Water-related Work is located on portions of Gloria Drive and Valerie Way. All Work is located in an unincorporated area outside the city
 limits of Santa Rosa.



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North Bay Water Reuse Program, Sonoma Valley County Sanitation District, Napa Salt Marsh Restoration Pipeline, (Carneros Reservoir to Huichica Unit)

Date Started: March, 2013

Date Completed: November, 2013

Final Contract Amount: $ 4,480,053

Contractor: Preston Pipelines, Inc., Milpitas, CA

Description of Work: Construction of a recycled water transmission pipeline in an unincorporated area of Sonoma and Napa Counties. The Work included the installation of approximately 18,200 lineal feet of 18- inch diameter recycled water transmission pipeline by means of direct bury, horizontal directional drilling or bore and jack; pipe appurtenances; and incidental related Work.



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Santa Rosa Aqueduct Seismic Hazard Mitigation (Rodgers Creek Fault Crossing)

Date Started: December, 2012

Date Completed: October, 2013

Final Contract Amount: $3,305,336

Contractor: Ranger Pipelines, Inc. San Francisco, CA

Description of Work: Seismic hazard mitigation for the Owner’s Santa Rosa Aqueduct at the Rodgers Creek fault crossing, within the limits of the City of Santa Rosa, California, on Sonoma Avenue between intersections of Sotoyome and Doctors Park Drive. The Work included the installation of approximately 1,900 linear feet of 36-inch steel water pipe including related fittings and appurtenances, a new water meter turnout, a manifold system to allow for bypass flows, cathodic protection system, electrical service panel, conduits, and cables, and abandonment of existing meter vault and a portion of the existing aqueduct.



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Service Center Relocation (2025 Aviation Boulevard)      

Date Started: May, 2012

Date Completed: July, 2013

Final Contract Amount: $2,817,437

Contractor: Helmer & Sons, Inc., Angwin, CA

Description of Work: Construction of a new building and remodeling of an existing building to for Sonoma Water’s new Service Center at 2025 Aviation Boulevard, Santa Rosa, California.  Work included the construction of a pre-engineered metal building, grading, paving, mechanical, electrical, and related work. In addition, Work included construction of a pond loop system involving the heating, ventilating, and air conditioning system in the new building, which was a specific component of the Renewable Energy Secure Communities project.  The pond loop used the existing 100 million gallon recycled water storage pond as the heat dissipation source for heating and cooling of the new Service Center. The heating, ventilating, and air conditioning system in the new Service Center will circulate water in a closed loop through coils of plastic pipe installed at the bottom of the recycled water storage pond (pond loop). These coils of pipe will dissipate heat in the summer and absorb heat in the winter within the pond.



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Airport-Larkfield-Wikiup Sanitation Zone Treatment Plant Emergency Gas Scrubber System

Date Started: January, 2011

Date Completed: August, 2013

Final Contract Amount: $236,176

Contractor: Arnold Construction Company, Fulton, CA

Description of Work: Installation of an emergency gas scrubber system at Sonoma Water’s wastewater treatment plant located at 2025 Aviation Boulevard, Santa Rosa, California. Work included providing a concrete pad, ventilation ducts, electrical power and controls, and the emergency gas scrubber unit.




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Dry Creek Habitat Enhancement Demonstration Project, Phase I

Date Started: September, 2012

Date Completed:  November, 2012

Final Contract Amount: $184,748

Contractor: BioEngineering Associates, Inc., Laytonville, CA

Description of Work: Construction of habitat modifications along Dry Creek at 4900 West Dry Creek Road near the City of Healdsburg, California.  Work included habitat modification including new side channels, ponds, and alcoves, and rock weir riffles; enhancements to existing pools through selective grading, installation of woody debris, log jams, and large boulders as anchor material;  vegetation planting; installation of erosion control measures; excavation; and dewatering.



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Russian River County Sanitation District Disinfection Upgrade Project

Date Started: May, 2011

Date Completed: September, 2012

Final Contract Amount: $2,630,133

Contractor: Syblon Reid Contractors, Folsom, CA

Description of Work: Construction of a new ultraviolet light (UV) disinfection system at the Russian River County Sanitation District treatment plant located 18400 Neeley Road, Guerneville, California. Work included a low-pressure, high-output UV disinfection system in a 2-channel concrete basin; a coagulation and flocculation tank and chemical feed equipment; and piping, electrical and other modifications at the treatment plant.



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North Bay Water Reuse Program - Sonoma Valley Effluent Reservoir R5 Project

Date Started: July, 2011

Date Completed: May, 2012

Final Contract Amount: $2,339,768

Contractor: Ford Construction Company, Inc., Lodi, CA

Description of Work: Recycled water storage reservoir to the North of the Sonoma Valley County Sanitation District Wastewater Treatment Plant (WWTP) located at 22675 8th Street East, Sonoma, California.  The reservoir stores approximately 100 acre-feet of recycled water.  Work included construction of a recycled water storage reservoir lined with a high-density polyethylene (HDPE) liner; inlet, outlet, overflow piping, concrete pumping station, and pump; 18-inch recycled water pipeline; and electrical and telemetry work to connect the reservoir into the WWTP and recycled water system.