Slayden served as the Progressive Design-Builder for Tualatin Valley Water District’s 189th Pump Station and Pipeline project. The project replaced aging 189th and Goyak pump station facilities and reservoirs that had reached the end of their useful life and improved capacity, reliability, and seismic resiliency for the growing Cooper Mountain service area.
During preconstruction, Slayden worked with TVWD and Carollo Engineers to evaluate constructability, phasing, cost, schedule, neighborhood impacts, and procurement strategies. Planning focused on maintaining water service, coordinating work within residential areas, and sequencing demolition, pipeline installation, and pump station construction around active water system operations.
Construction included a new 5.2 MGD pump station with permanent on-demand backup power, approximately 1,850 feet of 16-inch ductile iron discharge piping, demolition of the existing 189th Pump Station and 2 MG reservoir, and demolition of the existing Goyak Pump Station and 1 MG reservoir. The project also included site security upgrades and related civil, mechanical, electrical, controls, and site restoration work.
Slayden earned First Place in the 2025 AGC Construction Safety Excellence Awards (CSEA) in the Utility Infrastructure Category — Under 500,000 Work Hours.
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Slayden Constructors and Jacobs Engineering recently completed a $78 million expansion of the Robert A. Duff Water Treatment Plant for the Medford Water Commission. The project boosts capacity from 45 to 65 million gallons per day and adds advanced filtration, a new reservoir, a modern pump station, and seismic‑resilient redundancies. This upgrade strengthens long‑term water reliability for Medford and the greater Rogue Valley, supporting regional growth and public health.
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Slayden’s Jeff Wall recently achieved a unique milestone. At the Pacific Northwest Clean Water Association (PNCWA) conference in Spokane, Washington, Jeff became the first contractor to be chosen under the PNCWA to join the Select Society of Sanitary Sludge Shovelers, also known as the 5S society. Members are selected based on “outstanding, meritorious service above and beyond the call of duty.” As recognition for this achievement, Jeff received a one-of-a-kind -5S gold shovel award.
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