Wastewater

Spokane River Side Park Water Reclamation Facility

Slayden and MWH Constructors are working with the City of Spokane on major upgrades to their Riverside Park Water Reclamation Facility. This upgrade will include Next Level of Treatment which is a new filtration system that will greatly improve the quality of effluent that is released into the Spokane River. The major reason for the…

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Washougal Wastewater Treatment Plant

The purpose of this Waste Water Treatment Plant improvements project was to double the treatment capacity from 2.24 million gallons per day to 4.48 million gallons per day. The expansion includes a second influent pump station, a second oxidation ditch, flow distribution structure, second ultra violet disinfection system and a new structure to house the…

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Medford RWRF Cogen

The Regional Water Reclamation Facility was originally constructed in 1969 and provides sewage treatment for Medford, Central Point, Phoenix, Talent, Jacksonville, Eagle Point, and White City. The RWRF was phased construction of improvements to expand the RWRF to comply with discharge standards and provide increased capacity for regional growth. Current capacity is 20 MGD dry…

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Stayton Wastewater Treatment Plant

This project was an expansion to the Treatment Plant for the City of Stayton. The project included construction of a new selector cell, filter structure, sludge drying and storage building, sludge storage tank, UV building over existing open channels and a shop. Specific new equipment included a sludge dryer, three-belt belt filter press, odor control…

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Tri-City Water Pollution Control Plant Phase 1

The Tri-City Phase 1 Expansion includes, but is not limited to, an intermediate pumping station, fine screening, aeration basin, blower building, membrane building, ultraviolet (UV) disinfection system, chemical system, galleries, and ancillary systems to expand the designated activated sludge treatment plant by 4.0 million gallons per day (MGD) average day flow/10.0 MGD peak hour flow…

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Willow Lake WPCP Headworks and Primary Treatment Improvements

Slayden was selected as the CM/GC on this $92 MM Headworks and Pumping Plant Project for the City of Salem. This fast track project included construction of new headworks, influent and primary pump station, bar screen facility, two electrical buildings, two new primary clarifiers, effluent analyzer building, and an effluent diversion structure. Specific work components…

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Tahoe Truckee Water Reclamation Plant

Due to the population growth, large tourist industry, and ongoing environmental concerns, the City of Truckee required a major $53 million upgrade to their existing wastewater treatment plant. This project included excavation of 75,000 CY for multiple structures in a tight existing plant, excavation of over 45,000 CY for more than four miles of pipelines…

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Corvallis WWRP Disinfection Facility

The Corvallis WWRP Disinfection Facilities project involves the construction of a new Chlorine Contact Basin, Chemical Building, and sodium bisulfite and metering facility. Yard piping includes 72” diameter secondary Effluent with flow metering facility, 48” diameter plant effluent, utility corridor with associated utilities, as well as, storm drain and plant water improvements. Total Project Value:…

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Tri-City Wastewater Treatment Plant Improvement Project

Upgrades to Tri-City wastewater plant involved major changes to the solids handling process. The initial phase of construction involved the removal from service of a DAFT tank and in its place installing two Andritz 2.0 meter Gravity Belt Thickeners for solids thickening and an Andritz D7LL Centrifuge and associated conveyors for solids dewatering and load…

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Willow Lake Perimeter Utility Corridor

This $9.4 million CM/GC project included the construction of a mile of perimeter duct bank and piping corridor. This project also involved many aspects of coordination; plant power was transferred to new plant switchgear and interior plant transformers with no interruption to plant functions, power was required to be provided to a new administration building…

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