Clark Regional Wastewater District – Ridgefield, WA – Phased Lift Station
Phased Wastewater Lift Station Project Description
Romtec Utilities is an expert at supplying the pump station to meet our customers’ needs, including current and future needs in “phased” pump stations. Romtec Utilities worked with Rotschy, Inc. to supply a phased lift station for the Seton Pump Station project in Washington.
A phased lift station is a lift station that is designed to accommodate larger or additional equipment to better manage anticipated future flows. This can include additional or larger pumps, and larger piping and force mains. Phased lift stations are often supplied for housing developments whose wastewater flows will increase as more houses are added and more families move into the neighborhood. This was exactly the case in the Seton Pump Station project. The phased wastewater lift station will collect flows from the new Seton housing development by Hinton Development and transfer the wastewater to the Clark Regional Wastewater District (CRWWD).
Phased Pump Station Design
The Romtec Utilities lift station is housed in a precast concrete wet well that has an 8’ inner diameter and extends 22.5’ in depth and is large enough to accommodate initial and future flows. At the bottom of the well, two 10 horsepower Flygt Submersible Pumps will meet the required initial flows. When these pumps are no longer able to meet the pumping demands of the lift station, they will be swapped out with larger 25 horsepower pumps that will be able to accommodate higher flows and duty points.
The level sensing in this system is achieved with a Siemens Ultrasonic Hydroranger, with a conductive probe system as a secondary level sensor. Having secondary level sensors provides a backup in the event of the primary level sensor failing and can prevent hazardous overflows of the wastewater. The level sensors send their readings to an Allen-Bradley MicroLogix 1400 PLC controller housed in a NEMA 4 painted steel enclosure.
Romtec Utilities also supplied a valve vault for easy access to valves for maintenance, and a “pigging” vault with multiple force mains and pressure transmitters. When the lift station transitions to larger pumps, a larger force main will be needed and is already available in the pigging vault, making the transition both easier and faster.
Why They Chose Romtec Utilities
Rotschy installed this lift station onsite for Hinton Development, and the lift station will be owned and maintained by Clark Regional Wastewater District. Romtec Utilities has worked with Clark Regional Wastewater District on 10+ projects in the past, and we are happy to be able to continually provide pump stations that meet CRWWD standards and the needs of our customer.
What Romtec Utilities Provided
- Pump Station Design & Engineering
- Package Pump Station Supplier
- Package Pump Station Manufacturer
- On-Site Construction Adviser
- On-Site Start-Up Management