Location of CFS Study Area
Lower Skykomish River valley from Gold Bar to the mouth (Monroe), between river miles (RM) 0 to 23.
Studies Will Guide Actions
The results of these studies will inform public safety, climate change impacts, potential multi-benefit projects and options for landowners.
- Hydraulic and Hydrologic Modelling (to be completed in early 2021) – University of Washington’s Climate Impacts Group (UW CIG) will use the best available data to model future climate change impacts on river flows. With accurate precipitation estimates and a two-dimensional model of river flow, we can better predict high water and floodplain inundation.
Hydraulic Report (PDF)
Hydrologic Report (PDF)
- Geomorphic Assessment and Channel Migration Zone (CMZ) Studies (completed in early 2021) – By understanding where the river has been in the past, what the river is doing now and potential processes on the landscape in the future, CFS teams will have a technical foundation for understanding and predicting erosion risk into the future.
Channel Migration Zone (CMZ) Study (PDF)
Geomorphic Assessment Report (PDF)
Geomorphic Assessment - Appendix A (PDF)
Geomorphic Assessment - Appendix B (PDF)
- Infrastructure Assessment (to be completed in early 2021) – Buildings, levees, revetments, railways, bridges, roads and other structures in the study area may face greater risk from high water, erosion, and channel dynamics. This study specifically looked at 11 different private and county-owned levee structures to assess their condition.
Infrastructure Assessment Report (PDF)