Richard A. Reynolds Groundwater Desalination Facility Phase II Expansion

Project Details

  • Location:
    Chula Vista, CA
  • Delivery Method:
    Design-Bid-Build
  • Constructed Value:
    $14.7 million
  • Completed:
    June 2017
  • Project Highlights:
    • Expansion of major water
      treatment facility serving
      south bay San Diego County
    • Doubles the production of
      locally produced drinking water
    • Filanc led the construction of this
      project finishing on time and
      safely with over 3,800 hours
      worked with no lost time incidents
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Richard A. Reynolds Desalination Facility Phase II Expansion

Sweetwater Authority

The original Reynolds Facility, built in 1999, was sized in anticipation of this expansion. The original facility contained treatment equipment with a capacity to treat 5 million gallons per day (MGD). In order to increase the capacity to the necessary 10 MGD, additional reverse osmosis (RO) equipment was installed within the existing building, and additional iron and manganese treatment equipment was installed adjacent to the existing equipment located next to the building.

The scope of work included modification to the existing brackish groundwater desalination facility, which included: three RO trains, iron and manganese filtration systems, degassifier, fluoride system, chemical system modification, and extensive electrical, instrumentation and pump and motor installation. Construction also included new wellhead facility and well buildings at five new wells.

The five new extraction wells were construction to produce 1 to 2 MGD. The pipelines needed to connect the new wells to the Reynolds facility were constructed along existing roadways, and crossed underneath the Sweetwater River. A total of 13,000-feet of pipeline was installed using open trenches, and 1,200-feet were installed using directional boring.