The Cedar River is closed from river mile 4.5 to 13.5 due to several downed logs spanning the corridor and blocking safe passage. Those logjams create hazards for recreationalists and habitat for fish — a policy puzzle King County is currently working to address.
Snoqualmie Fish, Farm and Flood Advisory Committee that has spent more than three years forging the first major agreement in the county to strike a balance between farming interests and salmon recovery.
Flooding has long been an issue along these lower six miles of the Tolt; many residences are at risk during even modest flood events. But also of concern is what is called channel migration, when the river changes course and cuts a new path, heedless, of course, of private property lines.
When Terry started, LiDAR – aerial imagery that uses laser to map river-basin topography – didn’t exist. Nor were GIS – Geographic Information Systems – or, for that matter, high-tech sonar-based river surveys in widespread use.