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.

Assembling of the Concrete Wet Well in a Large Hole

Commercial Development | Newark, DE | 60 GPM - 16' TDH

jweddell50gpm - 100gpm, Apartment Complexes, Eastern, Wastewater

A commercial development in Delaware required this wastewater lift station to handle low flows of sewage from a new fast food restaurant and retail stores. Tsurumi cutter pumps in a duplex configuration macerate solids any in the wastewater to pass through the force main diameter. This lift station pumps a short distance with low head to a nearby gravity collection system that flows to treatment. A UL listed control panel was supplied for complete electrical controls with Nolta Niva floats for in-well liquid level-sensing.

Union Pacific Railroad|Cheyenne, WY|100 GPM - 22' TDH

jweddell50gpm - 100gpm, Collection Systems, Equipment Washdown, Mountain, Oil/Water Separators, Railyards, Replacements & Retrofits, Stormwater Runoff, Wastewater

The Union Pacific Depot in Cheyenne, Wyoming needed two new sewer lift stations to replace its existing sewer collection system. Each lift station included three precast concrete vault structures, a wet well, valve vault, and metering vault. Both systems use 2 hp Ebara Vortex® sewage pumps in duplex configurations that are explosions proof rated for Class I, Division I locations. The valve assemblies comprise Val-Matic Cam-Centric® plug valves and Swing-Flex® check valves with pressure gauges. Endress and Hauser PROline® electromagnetic flow meters measure the sewage flows for both lift stations. These in-ground valve and meter assemblies were fitted with heat tracing to provide reliable frost protection with Raychem and Digitrace components.

City of Shafter in California

The City of Shafter|Shafter, CA|400 GPM - 28.5' TDH

jweddell300gpm - 500gpm, Pacific, Replacements & Retrofits, Wastewater

A suburb of the City of Shafter required a lift station package to repair and rehabilitate an existing wastewater sump. Duplex submersible centrifugal pumps and discharge pipe mounting brackets were fitted to a concrete slab poured in the bottom of the existing manhole. The Romtec Utilities package included the proper components to operate in this 26-foot-deep sump. An outdoor MultiSmart control panel utilizes conductive probes for primary and backup level controls and an autodialer for communications. This retrofit package saved about 60% the cost of a new lift station.