The Snohomish Co. Noxious Weed Control Board (SCNWCB) & Snohomish Co. Public Works Surface Water Management (SWM) had worked with community members to restore riparian habitat along the South Fork & North Fork Stillaguamish River. This project had continued a landscape-scale, coordinated program of protection & restoration of riparian ecosystem function through control of invasive knotweeds. To restore and protect salmon habitat, Snohomish County Noxious Weed Control Board & Surface Water Management proactively worked with private and public landowners to control knotweed on the North Fork; then Surface Water Management's Native Plant Program installed native plants in knotweed treated areas. The entire South Fork was surveyed and determined to almost be 100% free of knotweed. With an average of 7% of the historic population returning each year, Stillaguamish River Chinook are highly threatened of becoming extinct. Currently riparian habitat is degraded. Lack of tree cover & the spread of knotweed contributes to high water temperatures, excessive sedimentation, reduced food supply, & loss of in-stream cover, all of which harm salmon. Knotweed, a non-native plant, is invading the project area; creating dense monoculture stands that crowd out native vegetation. Knotweed regenerates from severed roots and stems, spreads easily downstream. This project improved salmon habitat by increasing shade, leaf & wood input, improving bank stability, & decrease knotweed presence. Project partners include Snohomish Conservation District, Sound Salmon Solutions & Snohomish County Surface Water Management. Project deliverables have included treatment & planting location maps, planting plans and before/after photos.