A vital addition to the community

Miraloma Recharge Basin

When the Orange County Water District (OCWD) identified the need for a new percolation basin, they enlisted our expertise. Built on a 13-acre site in Anaheim, the Miraloma Basin is a vital addition to OCWD’s groundwater management system that allows the percolation of up to an additional 6,000 acre-feet of water — enough for 50,000 people. Prior to construction, thousands of acre‐feet of water were lost every year due to insufficient recharge capacity in the region.

Our engineering and construction support services included preparing a preliminary design report and plans, specifications, and estimates. The selected alternative provides a balance of cost savings and functionality through reduced pipeline lengths and a basin configuration that allows for a future lowering of the basin floor.

This facility is devoted to water from the groundwater replenishment system, the world’s largest advanced wastewater purification system for indirect potable reuse. Although only recently put into service, the basin yields the highest measured percolation rates among OCWD’s 21 basins due to favorable geology and ultra-pure GWRS water.