Lake Hills and NW Lake Sammamish sewer upgrade
Project update
March 22, 2021
Schedule
Construction for the Lake Hills/NW Lake Sammamish Sewer Upgrade Project is delayed until at least 2022. We've experienced slowdowns in acquiring all the permits that are necessary to complete the project. We expect to have a better idea of when we will start construction by late spring 2021.
You will continue to see crews from time-to-time conducting inspections and maintenance on the existing sewer line. This work is necessary to ensure safe and reliable sewer service until we are able to install the new pipe.
The plan for trees
King County is committed to the environment, and construction projects are no exception. Learn more about the County’s commitment to trees in this fact sheet about the plan for trees along the future sewer route. Many plants and trees have grown up around the sewer pipe since it was installed 50 years ago. While the design team works to protect sensitive environments and trees, impacts can’t always be avoided. Our team is working with Tribes, local jurisdictions, and permitting agencies to protect the existing trees, minimize removals, and develop restoration plans.
The goal is a future tree canopy that is equal to or better than what exists today. Read more in The Plan for Trees fact sheet .
No in-person events
Due to COVID-19, King County’s Wastewater Treatment Division (WTD) is not currently hosting in-person meeting or events. However, we are committed to sharing information in alternative ways.
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 Kelly Foley Kruse at 206-477-8621 or kelly.foleykruse@kingcounty.gov.
Resources
- Project Summer newsletter , August 2020
- Sammamish River Trail preliminary detour routes and restoration , April 2019
- Project Overview fact sheet (updated December 2018)
- Glossary of terms: King County Wastewater 101
- Meeting calendar for locations and meeting materials
- Project library for updates, fact sheets and environmental documents
- To sign up for project text alerts, text KING REDMONDSEWER to 468-311
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.
Project timeline
Project area map