Problem: Sam Barlow High School had been storing and trucking sewage to the city of Gresham, Oregon, treatment plant for nearly 50 years. The authority did not want wastewater to flow into a nearby creek, so they hired Romtec Utilities to design and supply two new wastewater pump stations. As part of this project, Romtec Utilities needed to come up with a way to interlock the two lift stations and allow them to communicate and to coordinate their operation.
Solution: Romtec completed two wastewater pump stations; the first at SE Lusted Road in Gresham, and the second at Sam Barlow High School. The pump stations serve the school and will lift the sanitary sewer up to the city’s public sanitary storm sewer system. The Sam Barlow Station feeds to the Lusted Road pump station. These stations communicate directly with each other, interlocking operations and preventing critical failures.
Result: To avoid a potential issue at the Lusted Road pump system, all alarms are communicated to the Sam Barlow system. If the alarm is critical, operation at the Sam Barlow system will cease. The unique part about this project is that Romtec Utilities provided a custom SCADA configuration utilizing an Ewon Flexy to interlock the Sam Barlow station with the Lusted station to work hand in hand. The design of the two systems included force mains and gravity lines to discharge to the city system. These pump stations provide interconnected controls to prevent any unwanted discharge from the systems in case of failure. 541-496-3541; www.romtecutilities.com
