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State highways cross streams and rivers in thousands of places in Washington State, which can impede fish migration. WSDOT has worked for nearly three decades to improve fish passage and reconnect streams to help keep our waterways healthy. WSDOT Fish Barrier Correction is a priority. Learn more in the latest Fish Passage Annual Report (pdf 8.4 mb) and our new Video.

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Before Photo

The old culvert at US Highway 97 Swauk Creek was a barrier to fish passage due to excessive slope.

After Photo

The new culvert on US Highway 97 Swauk Creek, built in 2018, provides access for steelhead, resident trout, and bull trout.