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January 2026
King County’s contractor is continuing to prepare work areas for active construction in Bellevue.
As early as January 26, King County’s contractor will start drilling north of the Coal Creek Parkway SE and Forest Drive SE intersection. Drilling work will last at least three weeks. We will provide updates on any changes to the expected work on our website and by email. Please click here to sign up for the email update.
What to expect:
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Work hours: 6 a.m. - 3 p.m. weekdays.
- Southbound single-lane closure around the work area during permitted work hours. Expect traffic delays. At least one lane of traffic will be maintained. Flaggers will be present to direct traffic. Drivers and cyclists will share a lane when traveling through the work area. Please use caution passing through the work area.
- Noise: Construction noise and drilling during permitted work hours.
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Construction vehicles will be entering and leaving the work area.
 Note: Work area shown on the map is approximate.
About this project
Construction for King County Wastewater Treatment Division's (WTD) Coal Creek Sewer Upgrade Project began this past June. This multi-year project will provide needed wastewater capacity for growing communities in Bellevue and Newcastle.
After the pipe work is completed, the contractor will restore the Coal Creek Natural Area, parking areas, and affected roadways to protect the creek, trails, and infrastructure. The rebuilt Red Cedar Trailhead will retain the same look-and-feel while enhancing accessibility for visitors of all abilities.
For more information
Visit the Coal Creek project website for the most up-to-date construction information:
Call or email: Frances Kuo at 206-492-6499 or CoalCreekProject@kingcounty.gov.
Note: This is the King County Coal Creek Sewer Upgrade Project hotline. If there is an emergency, please dial 911. This phone line is for incoming calls only. We will never call you by this number. If you receive a call claiming to be from this number, please be aware it may be a scam.
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