Projects – Slayden

Cabinet Gorge Dam Fish Passage Facility

Project Stats Owner: Avista Corporation Value: $27M Method: CM/GC Location: Clark Fork, ID This project was the result of several years of value engineering and preconstruction services that provided feasibility for construction of a new trap-and-haul fish passage in the tailrace of the dam. The facility is designed primarily for the Bull Trout species, which…

City of Bend – Colorado Lift Station

Project Stats Owner: City of Bend Value: $11M Method: DBB Location: Bend, OR Bend’s sewer collection system was near capacity. In some areas, existing sewer pipes routinely approached overflow levels. In parts of the city it was difficult to add any major new employer or residential development. The Colorado Lift Station project upgraded and replaced…

Geren Island Water Treatment Plant Ozone Upgrades

Project Stats Owner: City of Salem Value: $49M Method: CM/GC Location: Salem, OR The City of Salem has been operating the Geren Island Water Treatment Plant since 1937. Presently, the plant has the capacity to treat up to 80 MGD utilizing biologically active slow sand filtration. However, in the early summer of 2018, the City…

Tri-City Water Pollution Control Plant

Project Stats Owner: Water Environmental Services Value: $80M Method: CM/GC Location: Oregon City, OR Slayden was selected for this CM/GC project in Oregon City, Oregon and completed preconstruction, construction, and commissioning for the expansion. A unique combination of conventional and innovative wastewater treatment technologies were utilized to ensure a high level of treatment capability within…

Washougal Wastewater Treatment Plant

Project Stats Owner: City of Washougal Value: $13M Method: DBB Location: Washougal, WA Washougal is a small city on the Columbia River, just east of the Portland-Vancouver metro area. The City selected Slayden to double the treatment capacity of their existing wastewater treatment plant (WWTP), increasing their capacity from 2.24 MGD to 4.48 MGD. These…

Lebanon Water Treatment Plant

Project Stats Owner: City of Lebanon Value: $28M Method: CM/GC Location: Lebanon, OR Slayden replaced the aging Water Treatment Plant (WTP) for the City of Lebanon, Oregon. This replacement includes the construction of a new intake on the South Santiam River; a new raw water pump station; a new water treatment plant; and raw water…

Sunriver WWTP Membranes

Project Stats Owner: Northwest Natural Value: $16M Method: CM/GC Location: Sunriver, OR This new mebrane bioreactor (MBR) treatment facility and new headworks was needed to meet more stringent discharge permit requirements to achieve class A recycled water standards. Through the use of extensive value engineering, we were able to meet the budget constraints for this…

Post Falls Landing Park

Project Stats Owner: Avista Corporation Value: $3M Method: PDB Location: Post Falls, ID This project created Post Falls Landing, a new multi-functional recreation space along the Spokane River, across from the Post Falls North Channel Dam. This project was a joint effort between the City of Post Falls and Avista, the local electric and gas…

Joint Water Commission Water Treatment Plant Expansion

The Joint Water Commission is expanding their current water treatment plant located in Forest Grove, Oregon. JWC is the primary drinking water supplier in Washington County, Oregon and is responsible for treating, transmitting, and storing portable water for over 350,000 customers. The purpose of this expansion is to accommodate growing communities in Washington County. The…

Spokane River Side Park Water Reclamation Facility

Slayden and MWH Constructors worked with the City of Spokane to achieve major upgrades to their Riverside Park Water Reclamation Facility. The upgrade included a Next Level of Treatment (NLT) – a new membrane filtration system that significantly improved the quality of effluent released into the Spokane River. The primary reason for the NLT was…