Elsinore Valley Municipal Water District (EVMWD) is a sub-agency of the Western Municipal Water District, a member agency of the Metropolitan Water District of Southern California. EVMWD’s powers include providing public water service, planning and developing water supply, and treating, disposing of, and recycling wastewater. The district owns and operates wells in the Elsinore Groundwater basin and surrounding basins, including Warm Springs, Lee Lakes, Bedford, and Coldwater, and has more than 42,000 water, wastewater, and agricultural service connections.
Anticipating rapid population growth over the next two decades, Elsinore Valley Municipal Water District wished to reduce their dependence on imported or purchased water. Local water resources, including groundwater and surface water from Canyon Lake, satisfied only one-third of the demand in EVMWD. The rest came from surface water and imported sources.
They focused on developing groundwater resources, identifying several wells in need of rehabilitation in the Elsinore, Bedford, and Coldwater basins. EVMWD turned to Geoscience to manage the project. To keep the wells performing at maximum efficiency, periodic maintenance would be required. EVMWD turned to Geoscience to assist in developing rehabilitation plans for the targeted wells.
Geoscience developed site-specific rehabilitation and redevelopment plans to maximize well yield and prolong well life.
At each location, the process started with an initial inspection of each well using downhole video surveys. Once a well was deemed suitable for rehabilitation, Geoscience worked closely with rehabilitation chemical manufacturers to optimize a chemical program that would address site-specific biological and scale fouling. Then came the redevelopment phase, which consisted of swabbing and airlifting, then pumping and surging.
At the end of each rehabilitation and redevelopment cycle, Geoscience gauged progress by performing aquifer pumping tests to determine the efficiency of the well, and then revised the production potential based on the results.
By producing their own potable water supply through wells, EVMWD greatly reduces the cost of acquiring water. Regular well maintenance keeps them producing at maximum efficiency, prolongs well life, reduces the downtime associated with unforeseen shutdowns, and reduces reliance on imported sources. Also, in times of drought or other water shortages, EVMWD can reliably provide water to their customers should water wholesalers reduce delivery volumes or fail to make deliveries.
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