South Plant treats wastewater from homes and businesses coming from cities located east and south of Lake Washington. Approximately 90 million gallons a day (mgd) of wastewater is treated at this facility during the dry months, and up to about 300 mgd flows can be treated during the rain/storm season. The project included an upgrade of plant automated control system to county standard SCADA control system, as well as installation of instrumentation, motor controllers, and UPS (Associated Electrical equipment). Valley contributed to the project by installing an emergency generator, UPS, ATS systems, variable frequency drives, grounding system, building management system, communications system, telephone system, and fire alarm system