DESCRIPTION
Thurston County Public Works will remove a 33% fish passage barrier to restore fish passage at 61st Ave. NW near Frye Cove County Park. A 121 ft long, 72 in diameter culvert created a slope and velocity barrier. This project will restore access to 0.44 mi. of spawning habitat and provide access to over 8 acres of wetland rearing habitat for coho salmon, sea-run cutthroat trout, and threatened steelhead. It will benefit threatened Chinook salmon and bull trout estuarine rearing habitat. This project will enhance wildlife interactions and park aesthetics in Frye Cove County Park.This project will allow the stream to function naturally and mitigate potential hazards. In 2021, inspections determined this culvert began to compress. Upon failure, public road safety and habitat access would be eliminated. This restoration project will replace the barrier with a 15-ft-wide fish passable structure. The new structure will contain streambed material to simulate natural channel conditions. LWD placement will strengthen the channel and enhance the riparian zone. The project will remove invasive plant species. Replanted native plants and trees will stabilize slopes, repair disturbed riparian areas, and prevent invasive species establishment. WDFW fish passage standards will be met. After construction, the site will be monitored for up to 5 years for permit compliance. The structure will be added to the Thurston County Bridge Program and maintained for its service life (~75-100 years).