About this project
King County Wastewater Treatment Division's (WTD) Coal Creek Sewer Upgrade project is starting construction as early as this June. This multi-year project will modernize wastewater infrastructure to support growing communities in Bellevue and Newcastle.
The Red Cedar Trailhead will be an active construction site and will close for approximately three years. Construction at the trailhead was planned in advance, and WTD coordinated early with the City of Bellevue to build a trail detour in 2021 around the work area in partnership with the City of Bellevue’s Well-KEPT program, a summer youth employment program. Traffic impacts are expected on Coal Creek Parkway SE as the contractor moves materials and equipment into the work areas.
After the pipe work is completed, the contractor will restore the Coal Creek Natural Area to protect the creek, trails, and remaining infrastructure. The rebuilt Red Cedar Trailhead will retain the same look-and-feel while enhancing accessibility for visitors of all abilities.
Visit us at the Red Cedar Trailhead on June 6 and 7
The project team will be at the Red Cedar Trailhead on June 6 and 7! Join us from 8:30am to 12:30pm to learn about the project, construction activities, and restoration work.
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When: Friday, June 6, and Saturday, June 7, 8:30am-12:30pm
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Where: Red Cedar Trailhead (Upper Coal Creek Trail West Trailhead), 5433 Coal Creek Parkway SE, Bellevue, WA 98006
Red Cedar Trailhead closure beginning as early as this summer
Starting this summer, the Red Cedar Trailhead will close as the contractor begins staging materials and equipment for the new pipeline work. The construction will continue northward from this location while crews feed pipe segments and manage tunneling soils returning to this work area.
We understand access to the Coal Creek Natural Area is important to Bellevue and Newcastle communities. While the Red Cedar Trailhead is closed, trail users can access the Natural Area via the Forest Drive Trailhead.
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Trailhead closure and detour: The Red Cedar Trailhead will close for approximately three years. Trail users will use an alternative path around the work area via the Forest Drive Trailhead.
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Limited parking: Limited parking is available at the Forest Drive Trailhead.
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Tree removal: The contractor will remove specific trees as identified in and around the Red Cedar Trailhead to stage materials and equipment. Trees outside of our work areas will not be removed. Once the work is complete, the contractor will restore the work areas.
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Noise: Typical construction noise near work areas.
 A map of the Coal Creek Parkway corridor displaying the Red Cedar Trailhead and the Forest Drive Trailhead. The Red Cedar Trailhead is indicated as closed with dotted red lines leading up to the trailhead and a red dot on top of the trailhead entrance representing its closure. A green dashed detour route travels north from the traffic sign along Coal Creek Parkway SE, turns right on Forest Drive SE towards the Forest Drive Trailhead, then moves south from the trailhead into the Coal Creek Natural Area to meet where the dotted red lines end. Parking is available at the Forest Drive Trailhead.
While the Red Cedar Trailhead is closed for construction, trail users can detour to the Forest Drive Trailhead. The Forest Drive Trailhead is east of the Coal Creek Parkway SE and Forest Drive SE intersection. Parking is available at the Forest Drive Trailhead.
Traffic impacts on Coal Creek Parkway SE
Please plan ahead for traffic impacts on Coal Creek Parkway SE as work begins. The contractor will have truck turn lanes on Coal Creek Parkway SE at the Red Cedar Trailhead and near Seattle Public Utilities’ right-of-way entrance near Newport Covenant Church. Drivers and cyclists will share a lane when traveling through work areas and are advised to use caution.
We’ll share information on traffic control plans throughout the project.
For more information
Shape the future of clean water
Your voice matters as we plan the future of clean water for our Puget Sound region. King County’s Vision for Clean Water sets our clean water goals for our regional wastewater system for the next 75 years. Help shape our region’s vision by taking a 15-minute survey at publicinput.com/VisionforCleanWater.
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