Project Info

SR 20 - Skagit River - Permanent Restoration - Completed October 2014

We installed engineered logjams along SR 20 about three miles east of Rockport in Skagit County to protect the highway from erosion. The logjams deflect the river flow away from the shoreline, stopping erosion in the area and protecting the highway from erosion between the logjams. They also provide habitat for young salmon to grow. The logjams are held together by large concrete dolosse, which resemble jacks from the children’s game.


How you benefit

Protects environment
Young salmon and other native fish can use the logjams as habitat, avoiding predators, growing larger before heading out to sea.

Economic incentive
The engineered logjams protect the highway from erosion, so the roadway does not have to be realigned.


Partnerships & cooperation
Throughout the process, WSDOT coordinated closely with the National Oceanic and Atmospheric Administration; the National Marine Fisheries Service; the Federal Highway Administration; the U.S. Fish and Wildlife Service; the U.S. Army Corps of Engineers; the Washington State Department of Fish and Wildlife; the Washington State Department of Ecology; the Washington State Department of Archaeology & Historic Preservation; the Department of Natural Resources; the U.S. Bureau of Indian Affairs; the U.S. Forest Service; the Skagit County Skagit River Systems Cooperative, which represents the Sauk-Suiattle Indian Tribe and the Swinomish Indian Tribal Community; the Upper Skagit Indian Tribe and the Federal Emergency Management Agency.


Pre-Existing Funds (PEF): $9,340,000
Total: $9,340,000


Contact us

Northwest Region Communications
15700 Dayton Avenue N.
Seattle, WA 98133  


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Engineered logjams on the Skagit River
Engineered logjams
protect SR 20 from the Skagit River about three miles east of Rockport.