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SR 20 North Cascades Highway – Preview of 2022 work – Future construction on the SR 20 corridor

SR 20 Swinomish Channel to Sedro-Woolley corridor improvements

The 1.5 mile segment of State Route 20 from Gardner Road (MP 61.58) to Collins Road (MP 63.06) is the focus of this corridor improvement project scheduled for construction during summer 2023. Proposed improvements include installing three roundabouts at the intersections of SR 20 and Gardner Road, District Line Road and Collins Road, as well as restricting access between Gardner Road and District Line Road by constructing a center median. The purpose of these improvements is to reduce the incidents in this area while maintaining a commitment to multimodal highways by meeting the needs of all users.

Map shows 1.5 mile segment of SR 20 between Gardner Road and Collins Road where a series of improvements will be made.
SR 20 Swinomish Channel to Sedro-Woolley corridor improvements

SR 20 Olson Creek and Unnamed Tributary to Skagit River fish passage

Scheduled for construction in 2023, this project will remove two existing fish barriers located along a 10-mile stretch of highway just east of Sauk Connection Road (MP 94.8) and just east of Ranger Station Road (MP 105.4) and replace them with fish passable structures. Additional details, including travel impacts will be available closer to the start of construction.

Map shows location of two existing fish barriers located along a 10-mile stretch of SR 20 between Sauk Connection Road and Ranger Station Road near Marblemount.
SR 20 Olson Creek and Unnamed Tributary to Skagit River fish passage

SR 20 Unnamed Tributary to Red Creek fish passage

Scheduled for construction in 2023, this project will remove the existing fish barrier between Valeria Place and Sims Road in Sedro-Woolley and replace it with a fish passable structure.

Map shows location of existing fish barrier between Valeria Place and Sims Road in Sedro-Woolley.
SR 20 Unnamed Tributary to Red Creek fish passage

During construction traffic will be shifted onto a one-lane temporary bypass and bicycles and pedestrians will be detoured around the work zone. Additional details will be available closer to the start of construction.

SR 20 Childs Creek to Skagit River and Unnamed Tributary fish passage

Scheduled for construction in 2024, this project will remove two fish existing fish barriers between Valeria Place and just east of Robinson Road in Sedro-Woolley and replace them with fish passable structures. Additional details, including travel impacts will be available closer to the start of construction.

Map shows location of two existing fish barriers between Valeria Place and Robinson Road in Sedro-Woolley.
SR 20 Childs Creek to Skagit River and Unnamed Tributary fish passage