Slayden partnered with the City of Washougal to expand its wastewater treatment plant, doubling the community’s treatment capacity from 2.24 to 4.48 MGD. As a small city along the Columbia River, Washougal needed a reliable, future‑ready plant, and the project required careful sequencing, coordinated shutdowns, and bypass pumping to keep operations running smoothly throughout construction.
The expansion added a second influent pump station, a new oxidation ditch, a flow distribution structure, and a second ultraviolet disinfection system. Slayden also constructed a new building to house the expanded UV system, added a modern electrical room to support the upgraded equipment, and built a new effluent pump station. The completed improvements strengthened the plant’s performance and positioned the community for long‑term growth.
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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