Sterling Construction Co. says that one of its affiliates won a $17 million contract from the Los Angeles County Sanitation District for work at the Valencia Water Reclamation Plant.

The project will add ultraviolet disinfection facilities and related systems to further treat influent wastewater. The work consists of a ground-up installation of several concrete structures, including a flow diversion structure, UV wetwell, UV reactor basin and multiple junction structures. Construction is expected to start in November 2018 and take approximately 24 months to complete.

Valencia is a tertiary treatment plant with solids processing facilities. It provides primary, secondary and tertiary treatment for 21.6 million gallons of wastewater per day. The plant processes all wastewater solids generated in the Santa Clarita Valley Sanitation District.

At the plant, wastewater solids are anaerobically digested, stored and then dewatered using plate and frame filter presses. The dewatered cake, or biosolids, is hauled away for composting. Methane gas is produced during the digestion process and is used to generate steam to heat the digesters.

Sterling specializes in heavy civil construction and residential concrete projects primarily in Arizona, California, Colorado, Hawaii, Nevada, Texas and Utah.