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January 2026
King County’s contractor is continuing construction activities in Bellevue.
On the early mornings of January 28 and January 30, the contractor will stop traffic in both directions on Coal Creek Parkway SE for short durations. The closures will be between the Red Cedar Trailhead entrance and north of the Forest Drive SE intersection, intermittently between 4 a.m. and 7 a.m..
These closures are required so the contractor can safely move oversized equipment in and out of the work area. Drivers should expect significant delays on Coal Creek Parkway SE during these hours. We encourage drivers to use alternate routes during the closures.
What to expect:
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Traffic impacts: Expect traffic delays. City of Bellevue Police will be present to direct traffic. Drivers and cyclists will wait outside the road closure area until directed through.
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Work hours: 4 a.m. to 7 a.m., on Wednesday, January 28 and Friday, January 30.
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Construction noise typical to a work site
 Note: Closure areas shown on the map are approximate.
Ongoing daytime single lane closures
The daytime northbound and southbound single lane closures on Coal Creek Parkway SE will remain in place as construction activities continue. We will provide timely updates on any changes to the expected traffic impacts.
- Permitted work hours for the southbound single-lane closure are 6 a.m. to 3 p.m., Monday to Friday.
- Permitted work hours for the northbound single-lane closure are 10:30 a.m. to 7:30 p.m., Monday to Friday.
 Note: Lane closure areas shown on the map are approximate.
Reminder: do not enter construction zones
The Red Cedar trailhead and other work areas are active construction zones. They remain closed to the public. Other trailheads in the area such as the Cinder Mine, Red Town, Coal Creek Family YMCA, and Forest Drive trailheads are available for trail users. Stay out of fenced areas and the creek bank for your safety and to protect the Coal Creek Natural Area and salmon habitat.
About this project
Construction for King County Wastewater Treatment Division's (WTD) Coal Creek Sewer Upgrade Project began in 2025. This project will provide needed wastewater capacity for growing communities in Bellevue and Newcastle.
After construction, 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 keep 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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