Plans, studies, reports & surveys
King County River and Floodplain Management Section
Plans
- Program and Project Effectiveness Monitoring Framework, January 2015 (PDF, 1.2MB)
- Cedar River Corridor Plan
- South Fork Snoqualmie River Corridor Plan
- Green River System-Wide Improvement Framework (SWIF)
- 2013 King County Flood Hazard Management Plan Update and Progress Report (Adopted Nov. 2013)
- 2006 King County Flood Hazard Management Plan
Reports
- Third-Party Review of Projects Involving Large Wood Emplacements (PDF, 22.34MB)
- Reddington Levee Setback Project Year 1 Monitoring Report, December 2014 (PDF. 1.2MB)
- Biological Effects Analysis Report - October 2003 to determine the potential effects of the King County River Management Program on endangered, threatened, and candidate salmonids. Based on the results of this analysis, the County could decide if any elements of the River Management Program might require modification to come into compliance with the Endangered Species Act (ESA).
- The Connection between Floodplains and the Economy
- King County Flood Control District annual and semi-annual reports
Studies
- Levee Breach Analysis Mapping and Risk Assessment
- USGS Coarse Sediment Dynamics in the White River Watershed, October 2019 (PDF, 5.09 MB)
- Levee Breach Analysis for King County Rivers, May 2019 (PDF, 4.1MB)
- 2015 Snoqualmie River Hydraulic Study: Evaluation of the Effects of Snoqualmie Falls Projects on Downstream Flooding
- Determining the Effects of Vegetation on Levee Structural Integrity on the Green River in King County, Washington, September 2014 (PDF, 3MB)
- 2013 King County River Recreation Study
- Cedar River Recreation Study
- South Fork Snoqualmie Gravel Removal Study
Guidelines
Surveys
For questions about this page, please contact the River and Floodplain Management Section, Water and Land Resources Division.