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Elliott West Wet Weather Treatment Station upgrade
King County is planning to upgrade the Elliott West Wet Weather Treatment Station (EWWTS). The upgrade will ensure compliance with stricter environmental regulations, meet the demands of a growing population, and handle a changing climate.
Project description
The Elliott West Wet Weather Treatment Station (EWWTS) is a combined sewer overflow (CSO) facility that was first completed in 2005. Since then, it has stored and treated sewage and stormwater during periods of heavy rain. EWWTS now needs to be upgraded to meet stricter environmental standards and to adapt to changing climate.
This project will ensure that the upgraded facility meets its permit requirements. This is a major investment to ensure King County continues to protect public health and the environment for years to come.
More information about the upgrade plans will be available this summer and fall. To stay updated, subscribe to our email list.
Project update
November 6, 2024
UPDATE: Crews will need to extend their work until 8:30 pm tonight.
Due to the excessive build-up of material, work may continue tomorrow, Thursday, November 7.
Community Services staff will provide an update if the maintenance work continues tomorrow, November 7.
Nearby residents are experiencing loud noise from the Elliott West Facility. This is part of a maintenance effort for the facility. Maintenance crews are vactoring (vacuuming) out the wet well at Elliott West Facility, which collects wastewater and stormwater and needs yearly cleaning to remove gravel, sludge, and debris.
Crews could not penetrate the material build-up at the bottom of the well on Tuesday, 11/05/2024. They are onsite today, Wednesday, 11/06/2024, with additional vactor trucks until 7:00 pm. The work should not extend beyond today.
If you have any questions, contact Ryan Harlow at 206-848-0814 or rharlow@kingcounty.gov.
Project schedule
Our team is in the early stages of designing the needed upgrades to EWWTS. Project timelines may change due to a number of factors. We will provide updates as our work progresses and any schedule changes are needed.