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Natural Resources and Parks
Public Affairs

Snoqualmie River embankment repairs this summer ensures protection of highway, trail


Crews will soon begin maintenance along a stretch of the Snoqualmie Valley Trail. Trail users should expect closure of the trail section to run from June 1 to Oct. 31.


Vital repairs to a damaged structure along the Snoqualmie River that protects a state highway, a fiber optic line, and a King County regional trail from river erosion is expected to begin in early June.

Work to rebuild the Sinnema Quaale Upper Revetment between Carnation and Duvall requires closing a stretch of the Snoqualmie Valley Trail from approximately 1-½ miles south of Northeast 124th Street to 2 miles north of the Stillwater Natural Area.

The trail closure is expected to run from June 1 to Oct. 31, and no trail detour is available. Trail users are encouraged to take advantage of other portions of King County Parks’ 175-mile regional trail system.

The aging revetment – which absorbs and deflects the Snoqualmie River’s erosive energy – has been repeatedly damaged by flooding.

Rebuilding the revetment includes reconstructing about 750 feet of bank, and rebuilding approximately 1,100 feet of the adjacent trail. The $6.3 million project is being funded primarily by the King County Flood Control District, with King County Parks providing funding for rebuilding the trail.

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About the King County Flood Control District

The King County Flood Control District is a special purpose government created to provide funding and policy oversight for flood protection projects and programs in King County.  The Flood Control District’s Board is composed of the members of the King County Council. The Water and Land Resources Division of the King County Department of Natural Resources and Parks develops and implements the approved flood protection projects and programs. Information is available at