Miramar Water Treatment Plant Expansion - San Diego, Calif.
A major component of San Diego’s capital improvements program to meet the water needs of its fast-growing population, this project increases WTP capacity from 140 to 215 MGD and provides a state-of-the-art facility with a 75-year design lifespan.
Built in 1962, much of the original facility and equipment were approaching the end of their useful life-spans. Coupled with changes in drinking water regulations, an expansion and upgrade were essential to the city's continued ability to supply treated water.
New construction entailed overflow / rapid mix / splitter box facilities, pre-ozonation / deaeration facilities, ozone facilities, twelve high-rate filters, bulk chemical storage area, chemical feed building, chlorine building, administration building, main switchgear building, and clearwell inlet structure, in addition to modifications to the existing flocculation / sedimentation facilities.
WSCI self-performed all excavation, backfill, structural concrete, process equipment, piping, and plumbing.
Completed in 530 days for just under $51M, this second phase included new flocculation and sedimentation basins, demolition of additional portions of the original plant, and tie-ins to the work completed in Contract A.