Public engagement

Visit our online open house and tell us what you think!

As 2026 begins, the project team has identified a corridor for a new wastewater pipe in the northeast Lake Sammamish area. We invite you to visit our online open house to learn more about the corridor and the project. You have an opportunity to ask questions and share your thoughts.

Visit the online open house by clicking below.

How we work with the community

King County works with the community to provide project information and identify potential impacts. Stay informed and involved as we share information through:

• Individual meetings with community groups, organizations and leaders
• Briefings to local community groups, agencies and jurisdictions
• Community meetings
• Project newsletters and flyers
• Project webpage

Our commitment to you

Whether you live, work, recreate or commute in the area, we know you’ll have questions and concerns about this project. King County is committed to keeping you up to date.

If you are interested in scheduling an individual meeting or briefing for your community organization, please contact our project community services team at SammamishPlateauDiversionProject@kingcounty.gov or 425-537-7216.