San Juan Water District is working on several large Capital Improvement Projects (CIPs) to meet state and federal regulations.  The CIPs include a variety of infrastructure repairs and new construction projects which are all part of our Retail and Wholesale financial plans. Projects are funded by rates from customers throughout our Wholesale and Retail service areas, property taxes and state and federal grants. 

CIPs are divided into Wholesale and Retail divisions and project costs are designated to the appropriate division.  SJWD personnel are constantly looking for ways to reduce cost and maintain quality service, including with our CIP program.

Treatment Plant Projects

A majority of the existing treatment plant was built in 1979 and is now in need of several equipment and process replacements and upgrades.  These replacement and improvement projects are identified, planned, budgeted, designed and constructed by SJWD when necessary.  Many projects are done in-house using Engineering personnel to design, and Treatment personnel to install, thereby saving our customers on costs.

Pipeline Replacements

We are proactively upgrading and replacing pipelines as necessary and as planned and budgeted for.  All pipeline projects are identified by condition assessments and then are budgeted for repair or replacement as necessary.  New pipelines can also be installed as part of a development project.  Pipeline extensions for new development are funded for by the developer, not by existing customers.


  • Pipelines and Water Services Improvements Projects (Retail)
    This project involved installation of new water distribution pipelines and water services to replace existing, aged pipelines and services that have reached their useful lifespan. These projects were identified in SJWD's Retail Master Plan and other planning and budgeting documents, and included the replacement of pipelines and services on all or portions of Erwin Ave., Peerless Ave., Telegraph Ave., Oak Ave., and Douglas Blvd.

  • Barton Road Intertie (Retail)
    This project was part of SJWD's Water Supply Reliability Project completed as part of the drought response planning efforts. The project itself involved installation of new pipeline to connect between PCWA and SJWD and facilitate conveyance of up to 2-MGD of emergency water supply in either direction. This project now provides improved reliability, and drought responsiveness and emergency water supply for both PCWA and SJWD.

  • Auburn Folsom Road 24-in Transmission Pipeline North Phase Project (Retail)
    This project is the final (third) phase of a transmission pipeline improvement project which was started in 2007. This major infrastructure improvement is now in service and conveys water from SJWD's Hinkle Reservoir, along Auburn Folsom Road, and connects to existing distribution piping at the intersection with Eureka Road. This pipeline supplies water to the Upper and Lower Granite Bay Pressure Zones. This project frees up capacity in the Bacon Zone thereby saving budget by eliminating the need for future upsizing of the Bacon Pump Station, and it also provides safety and emergency supply redundancy for the Retail service area distribution system.

  • SSWD-SJWD Pump Back Project (Wholesale)
    This was one of the Water Supply Reliability Projects which were completed as part of the drought response plan. This project involved the construction of a new booster pump station to transfer water from Sacramento Suburban Water District (SSWD) to SJWD. The project was developed under a joint agreement between SSWD and SJWD and facilitates the pumping of available SSWD groundwater reserves through existing transmission pipelines to then supply this groundwater to SJWD.

  • Wholesale Supply Control Valve Stations (Wholesale)
    This was one of the Water Supply Reliability Projects completed as part of the drought response plan. This project involves design and construction of two new pressure and flow control valve stations located on two existing wholesale transmission pipelines. These two control valve stations allow necessary control of the conveyance of water to the wholesale agencies during periods when drought conditions exist.

  • Granite Bay Booster Pump Station - Upper GB BPS & Lower GB BPS (Retail)
    This project was undertaken to replace an aged, existing pump station facility with new pumping facilities. The project consisted of construction of a new 4.96 Million Gallon per Day (MGD) capacity Upper Granite Bay Pump Station, and a new 10.1 MGD Lower Granite Bay Pump Station. Both of these pump stations replaced a single older pump station which had reached the end of its useful life. This project benefits the ratepayers by significantly increasing pumping efficiencies and reducing power use. This project was awarded as the "Energy Project of the Year 2015" by the Sacramento section of the American Society of Civil Engineers.



  • Water Treatment Plant Flocculation/Sedimentation Basin and Settled Water Channel Improvements (Wholesale)
    This project involves improvements to SJWD's water treatment plant and includes replacement of existing treatment process equipment including mechanical flocculators and sludge collection equipment within the existing flocculation-sedimentation basins, construction of a new 9-foot by 290-foot concrete settled water channel, and 7-foot by 70-foot concrete overflow weir structure, and the replacement of existing redwood baffle walls. The work for this project also includes concrete surface rehabilitation of portions of the flocculation and sedimentation basins, associated electrical and piping improvements, and other miscellaneous work. This project replaces existing equipment that is beyond its useful lifespan, and also provides treatment plant operational redundancy.

  • Water Treatment Plant Lime System Control & Feeder System Improvements (Wholesale)
    Lime is an additive used as part of the water treatment process to balance water quality and inhibit corrosion. This project makes improvements at the water treatment plant to the existing control and lime treatment process to improve lime addition.

  • Arc-Flash Electrical Safety ImprovementsRetail(Pump Stations) and Wholesale (WTP)
    The existing electrical switchgear and associated electrical equipment that supplies power to the electrical equipment located in the treatment plant and pump stations has in many cases been in service for 30- to 40-years. This project is being implemented to perform improvements which were identified in a recent condition assessment on the District's existing electrical equipment, and will reduce the potential for equipment failures, and increase electrical safety.

  • 2016-17 Mains & Services Projects (Retail)
    Installation of new water main and water services to replace aged pipelines and services that have reached their useful lifespan. These projects include, 1) replacement of approximately 980 lineal feet of old 20-, 16-, and 12-inch steel pipeline with new 12-in pipe on Main Ave between Madison Ave and Twin Lakes, 2) replacement of approximately 1,575-LF of existing, aged 24-in steel pipeline with a new 12-inch pipeline located on Oak Avenue at and to the east of the Casa Robles High school, and 3) replacement of approximately 850-LF of old, existing steel 6-in pipeline with new 8-in pipeline on Dambacher Drive.
  • Oak Ave American River Canyon North/South Pressure Reducing Station (Retail)
    This project is located at the intersection of ARC Drive and Oak Avenue, and consists of installing a new automated control valve station to be between two pressure zones. The project will reduce the excessive pressure in the ARC-South Zone when these two zones are seasonally interconnected to save pumping cost. The project will improve pumping plant efficiencies as well as fire emergency redundancy supply. Currently with no control valve in place when the interconnection pipeline is open the pressure in the ARC-South zone is too high and this contributes to an increase in pipeline and service leaks and customer service calls. The installation of the automatic control valve will provide the necessary supply to ARC-South without the over-pressurization.

  • Bacon/B2 Pressure Zone Control Valve Interties (Retail)
    This project is planned to facilitate the expansion of the Bacon pressure zone into the northerly portion of the Sierra Zone. The construction of the new control valve station will result in an improved turnover of stored water in the Kokila Storage Reservoir, and that will contribute to improved water quality in the reservoir, as well as in some of the existing Bacon Zone distribution piping. The installation of the planned new PRS's and the expansion of the Bacon Zone into the Sierra Zone will also result in less demand on the existing Sierra Pump Station which is currently running at full capacity with all four pumps running during the high summer demand months (currently with no redundant pump in the event of a pump failure).

  • Bacon/Sierra Zone Control Valve Interties (Retail)
    This project involves the installation of three new Pressure Reducing Stations (PRS's) to be constructed on the larger interconnections between the Bacon and Sierra zones. The installation of the planned new PRS's and the expansion of the Bacon Zone into the Sierra Zone will also result in less demand on the existing Sierra Pump Station which is currently running at full capacity with all four pumps running during the high summer demand months (currently with no redundant pump in the event of a pump failure).

  • Lower/Upper Granite Bay Zone Control Valve Intertie (Retail)
    This project will provide an automated control or check valve station on the normally closed interconnection pipeline between the Upper Granite Bay (UGB) and Lower Granite Bay (LGB) pressure zones. Construction of this new LGB/UGB Valve Station will provide an automated response to provide supply from the LGB zone to the UGB zone in the event that there is a UGB pump station failure, fire emergency, or other operational need. Currently this LGB/UGB interconnection piping location has a normally closed isolation valve which is manually opened by Field Operations Personnel when needed however, the response time for an Operator to drive to the location of the valve is longer than the time that the system takes to depressurized when there is a pump station failure.

  • Crown Point/Lower Granite Bay Intertie (Retail)
    This project involves construction of an access manway and installation of an electric motor drive actuator onto an existing isolation valve that is located on the underground bypass piping between the Crown Point and Lower Granite Bay booster pump stations. The addition of this valve actuator will allow the valve to be automatically opened in the event of a pump station failure, providing redundancy for safety and emergency supply for both the Crown Point and Lower Granite Bay pressure zones.

  • Los Lagos Tank Recoating and Mixing System Improvements (Retail)
    The existing Los Lagos Tank is a 1.65 Million Gallon welded steel, above ground storage tank that supplies the Lower Granite Bay and Upper Granite Bay pressure zones. This tank has been in service several years beyond the expected life of the existing coating, and is in strong need of a recoating to adequately protect the steel tank structure and thereby provide the required service life. The planned recoating project will strip, clean and recoat the interior and exterior surfaces of the steel tank. And while the tank is out of service for recoating, a new stationary mixing system will be installed on the interior of the Los Lagos Tank which will facilitate improved mixing of the stored water, better disinfection control, and reduce the potential for disinfection byproduct formation to improve water quality.

Planned Projects

For more information regarding design and construction please visit Engineering Services page

Current Bids

San Juan Water District Fair Oaks 40" Relining Project