The Water Replenishment District of Southern California (WRD) was established by a vote of the people in 1959 for the purpose of protecting the groundwater resources of two of the nation’s most utilized urban groundwater basins the Central Basin and West Coast Basin (Basins). The Basins provide nearly 50 percent of the drinking water for four million people (about 10% of California’s population) within 43 cities in southern Los Angeles County.
WRD has developed a suite of projects through its Water Independence Now (WIN) initiative to develop local and sustainable sources of water for use in groundwater replenishment activities, thus helping to end our reliance on imported water. The cornerstone for WIN is the Groundwater Reliability Improvement Program (GRIP) Advanced Water Treatment Facility (AWTF). The purpose of the GRIP AWTF project is to fully eliminate the current demand for imported water by producing 21,000 acre feet annually from local alternative sources for groundwater replenishment in the Central Basin.
The GRIP AWTF will be constructed on a 5.2 acre site in the City of Pico Rivera, adjacent to the San Gabriel River, allowing for direct delivery of purified recycled water via an existing pipeline leading into the San Gabriel Coastal Spreading Grounds where it will percolate in to the Central Basin. The GRIP AWTF will purify approximately 10,000 acre feet (3.25 billion gallons) of tertiary treated (recycled) water annually to near distilled levels. Together with another 11,000 acre feet (3.6 billion gallons) of recycled water, WRD will deliver 21,000 acre feet of water to the spreading grounds for groundwater recharge. Once the facility is constructed, the GRIP AWTF will include an approximately 25,000 square foot operations and learning center, a 48,000 square foot process building, and an 8,000 square foot chemical storage area. The entire facility was designed based on input from local residents at a Community Event held on June 6, 2015.
Deconstruction of the existing structures on site was completed in May 2016 and associated projects, including supplemental recharge well and groundwater monitoring well construction, brine disposal pipeline construction, and street improvements commenced shortly thereafter.
As of August 2016, two of the three groundwater monitoring wells have been constructed. The three supplemental recharge wells and the third groundwater monitoring well are expected to be installed by November 2016. Work on the process building and operations and learning center will start following completion of the three supplemental recharge wells. Approximately 50% of the brine disposal pipeline has been installed along a portion of San Gabriel River Parkway and Manning Road. The brine disposal pipeline, traffic signal modification upgrades at Beverly Boulevard and San Gabriel River Parkway/Manning Road, and street improvements are expected to be completed by October 2016.
The construction of the new treatment facility is anticipated to be fully operational by July 2018.