Skip to main content
King County logo

Wastewater Treatment Division (WTD) operations and projects

WTD operations staff remain on the job 24/7 to ensure the region’s wastewater treatment service continues. More information on how to report a problem you believe may be related to the County’s wastewater treatment system is available here:

The King County Wastewater Treatment Division remains committed to sharing information and gathering feedback from community members about its work and projects. WTD staff remain available to answer questions via email and phone during regular business hours. Project information lines remain available and are being monitored for ongoing construction projects.

Project update

September 18, 2020

Construction delayed until at least 2022

Construction for the Lake Hills/NW Lake Sammamish Sewer Upgrade Project is no longer expected to begin in 2021.

To complete the sewer upgrade, King County must get permits from the City of Redmond, City of Bellevue, and several state and federal agencies. It is important to take the time to get all necessary permits to install the new pipe in the safest way possible, limit impacts, and maximize improvements for people and the environment. While the project’s design continues, we are experiencing slowdowns in acquiring all the permits that are necessary to complete this work.

Construction will not begin until 2022 at the earliest. We expect to have a better estimate of when we will start construction by spring 2021. Thank you for your continued patience.

No in-person events

Due to COVID-19, King County's Wastewater Treatment Division (WTD) is not currently hosting in-person meetings or events. However, we are committed to sharing information in alternative ways. For example, be sure to check out our project signage next time you are out on the Sammamish River Trail.

signage along Sammamish River TrailLook for project signage along the Sammamish River Trail the next time you are out.

Our staff remain available to answer questions via email and phone. We can also:

  • Join your virtual meeting
  • Provide virtual briefings for community groups
  • Send you information in the mail about this project

Let us know how we can best communicate with you and your community by contacting Kristine Cramer at 206-477-5415 or


Project description

The Lake Hills and NW Lake Sammamish sewer pipe has been serving Redmond and Bellevue for 50 years. The water you use travels down your drain to City sewer systems. The City’s pipes send wastewater to King County’s sewer system where it is carried to the Brightwater Treatment Facility in Woodinville for treatment.

King County is working on a project to upgrade 4.5 miles of this sewer pipe. King County will build the new pipe in trails, roads and parks in Redmond. This project is necessary to meet the needs of your growing community. Construction is expected to begin in 2022 and may impact your daily routine. When complete, the new pipe will provide sewer service for 50 years or more.

King County está trabajando en un proyecto para actualizar 4.5 millas de tubería de alcantarillado en su área. King County construirá la nueva tubería en senderos, caminos y parques en Redmond. Este proyecto es necesario para satisfacer las necesidades de su comunidad en crecimiento. La construcción puede afectar su rutina diaria. Se espera que la construcción comience en 2022. Cuando se complete, la nueva tubería proporcionará un servicio de alcantarillado por los próximos 50 años o más. Si tiene preguntas o inquietudes, comuníquese con Kristine Cramer al 206-477-5415. Se le puede proporcionar un intérprete sin costo para usted.
金郡目前在您的 区域进行一项4.5英里长的污水管道改良计划。此管道将沿着步道,路道及公园范围来建设。此污水管道工程是为了适应社区发展的需求。施工或许将暂时影响您的日常生活。此工程计划将于2022年起施工。工程完成之后新的管道将提供至少50年的污水运输服务。如果您有任何问题或顾虑,请拨打206-477-5415与Kristine Cramer联系,翻译员将免费为您服务。
Lake Hills 與 NW Sammamish 湖的污水管線已為 Redmond 及 Bellevue 服務 50 年。你使用的水會透過排水管進入城市的下水道系統。城市的管線會將污水送至金郡 (King County) 的污水系統中,接著被送往 Woodinville 的 Brightwater 處理廠 進行處理。 金郡 (King County) 目前正在開展一項專案,將此污水管線的其中 4.5 哩進行升級。金郡 (King county) 會將新的管線鋪在 Redmond 市中的步道、道路、公園下。這項專案對於滿足您正在成長的社區的需求是必須要素。工程預計會從 2022 年開始,並可能會影響您的每日通勤。在工程完成後,新管道將能再為污水系統服務 50 年或更長時間。如有疑問,請致電 206-477-5415聯絡 Kristine Cramer。您將獲派一位傳譯員免費為您服務。

Project timeline

project timelineUpdated August 2020


Contact us

Contact Kristine Cramer at:

Sign up for email or text updates

To manage your preferences, enter your email or wireless number and select Confirm.

Project location

photo map of project areaProject area map

Back to the capital projects overview map .