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Coal Creek sewer upgrade

The Coal Creek Sewer Upgrade Project will install new sewer pipes to carry more wastewater and meet the growing needs of Bellevue and Newcastle.

Project description

The Coal Creek Sewer Upgrade Project will upgrade a regional sewer line that serves Bellevue and Newcastle. Built between 1966 and 1991, the existing pipeline is nearing its maximum capacity and needs to be upgraded to carry more wastewater and meet the growing needs of the community.

Once installed, the new sewer pipe will serve the area for another 50 years or more.

Project update

July 2024

Crews will be working in the Coal Creek Natural Area beginning as early as July 15. They are surveying conditions in the area of a maintenance hole that is located on the creek bank. Learn more about the survey in this notification.

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Interested in a project briefing for your community group?

We are happy to meet with you or come to your next community event to share the latest project information and to answer questions as we get closer to construction. Please contact Annie Pfeifer at 206-263-3203 or for more information.

Previous project updates

Project location