Coal Creek sewer upgrade
July 12, 2019
Field investigation update
Coal Creek Parkway
The schedule has changed for King County Wastewater Treatment Division’s contractor to perform field surveys at three locations in Coal Creek Parkway near the Upper West Trailhead at Coal Creek Natural Area (see map on page 3 of project update ). These surveys are now scheduled to begin Monday, July 15. Drivers can expect delays traveling past the work area, with one lane closures and detours around the work.
Coal Creek Natural Area
The Upper West (Red Cedar) trailhead will be closed for two days. Geotechnical surveys will move to the Natural Area on Monday-Tuesday, July 29-30. During this time, people will not be able to park at the trailhead, or to access trails in the work area from Forest Drive SE, SE 60th Street, or Red Town Trailhead.
For more information, see the update .
Find meeting materials for the May 15 and May 29 community open houses on our public involvement page. Please take a survey to tell us about you, how you use Coal Creek Parkway and the Natural Area, and how we can keep you up to date and involved in this project.
Visit our online open house and give input as many times as you wish from now until June 15. If you need help navigating the open house, or have questions, concerns, or comments, contact Monica Van der Vieren at email@example.com.
Please let us know how we can welcome you. Contact Monica Van der Vieren at firstname.lastname@example.org or 206-477-5502.
King County Wastewater Treatment Division (WTD) will upgrade a regional sewer line that serves Bellevue and Newcastle. The existing pipeline was built between 1966 and 1991 in an area that looked different from today, with a smaller population. The pipeline is nearing its maximum capacity and needs to be upgraded to carry more wastewater and meet the growing needs of your community.
Once installed, the new sewer pipe is designed to serve your community for another 50 years or more.
Protecting the Coal Creek Natural Area
The existing Coal Creek Trunk is approximately 2.5 miles long and primarily follows the banks of Coal Creek in the Coal Creek Natural Area between Newcastle and I-405. The new pipeline alignment will move the active pipeline away from Coal Creek offering better protection to this sensitive environmental area.
The selected pipeline alignment also aims to decrease impacts to both the Natural Area and Coal Creek Parkway SE during construction.
The project is in early design phase. Design is expected to be complete in 2020, with construction beginning in 2021. King County will work closely with area neighbors, property owners, community groups, and the Cities of Bellevue and Newscastle to plan for project activities and answer questions or concerns.