Final Expansion of California's Celebrated Groundwater Replenishment Project

Key Takeaways After two expansions since its opening in 2008, Southern California's Groundwater Replenishment System is at its goal capacity of 130 mgd. Through rigorous simulations and full‐scale testing, two special districts determined the best materials, methods, and designs to overcome challenges to ensure peak performance from the expansion. Efficiencies gained with improved methods, advanced technologies, and reviving an old pipeline could save the districts millions in energy costs.