Lake Union Park in Seattle Washington

Seattle Parks and Recreation|Seattle, WA|145 GPM - 20.8' TDH

jweddell100gpm - 300gpm, Municipal Collection, Pacific, Wastewater

A renovation of South Lake Union Park required a package lift station configured to meet the medium sewage flow requirements for a municipal and commercial wastewater system. Submersible solids handling pumps in a duplex configuration are protected from turbulence and cascading influent by a drop bowl. A separate below-grade valve vault holds the valves, gauges, indicators, and actuators. A UL listed control panel utilizes float controls for primary and backup liquid level-sensing and is housed in a nearby control building.

St. Helena Napa Valley's Main Street

The City of St. Helena|St. Helena, CA|254 GPM - 49.5' TDH

jweddell100gpm - 300gpm, Municipal Collection, Pacific, Sewer System Expansion, Wastewater

This municipal lift station in the Napa Valley was designed to handle medium sewage flows and medium head conditions. Flygt sewer pumps were supplied in a duplex configuration to integrate with the Tops Basin and discharge elbows. The complete structural components of this lift station were designed to finish two feet above-grade to be above the flood plain for the area. A proprietary control device and pressure transducer provide the system electrical controls.

City of Wenatchee in Washington

The City of Wenatchee|Wenatchee, WA|375 GPM - 125' TDH

jweddell300gpm - 500gpm, Municipal Collection, Municipal Lift Station Replacement, Pacific, Replacements & Retrofits, Wastewater

This municipal lift station replacement was configured to handle medium flows of sewage from a large area of Wenatchee, Washington. This deep wet well was constructed from precast concrete and includes Tnemec interior coating. Vaughan Chopper Pumps in a duplex configuration were selected to macerate solids and alternate pumping cycles. A PLC with a touchscreen interface provides an easy and flexible control panel. The primary level-sensing device is a pressure transducer with floats backup level-sensing. This control panel also uses soft starters to reduce current inrush to the 30 hp pumps.

Sammamish Plateau Water

Pacific Properties | Sammamish, WA | 85 GPM - 75' TDH

jweddell50gpm - 100gpm, Meter Vaults, Municipal Collection, Now & Future Expansions, Pacific, Residential Development, Sewer System Expansion, Urban Growth, Wastewater

This medium flow sewage lift station was designed for a new development to meet the Sammamish Plateau Water and Sewer District lift station design standards. These standards specify a PLC controller with touchscreen HMI, SCADA options, a precast concrete valve vault, wet well, meter vault, and duplex submersible pumps. In addition to these design standards, this lift station needed to tie-in to an existing force main owned by the District. Romtec Utilities provided the tie-in force main designs and calculations as well as VFDs (variable frequency drives) to match the changing flow and pressure conditions of the existing force main.

Husky Stadium

University of Washington|Seattle, WA|346 GPM - 40' TDH

jweddell300gpm - 500gpm, Grinder Vault, Municipal Collection, Pacific, Schools, Sewer System Expansion, Slurry/Gritty Water, Valve Vaults, Wastewater, Wastewater Featured

The renovation of the University of Washington’s Husky Stadium required a new lift station to handle medium flows of wastewater. Robust, 10hp Vaughan Chopper pumps were used in a duplex configuration to macerate solids and to pump under unpredictable conditions. The lift station, valve vault, and the access hatches were designed as traffic rated to accommodate loading/unloading next to the main grandstand. The UL listed control panel starts, stops, and alternates each pump cycle at levels measured by Noltaniva float sensors.