- About SRWP
- Board of Trustees
- Contact Us
- Watershed Internships and Volunteer Opportunities
- Watershed Blog
- Explore the Watershed
- A Roadmap to Watershed Management
- Sacramento River Basin
- Sacramento River Basin Watersheds
- Northeast Subregion
- Westside Subregion
- Eastside Subregion
- Feather River Subregion
- American River Subregion
- Sacramento Valley Subregion
- Water Quality Monitoring in the Sacramento River Basin
- Measuring the Health in the Sacramento River Basin
- Watershed Projects - Leading the Way
- Antelope Creek Watershed Stewardship - Lassen National Forest
- Battle Creek Restoration Project
- Bear Creek Meadow Restoration
- Bear River Setback Levee Project
- Cooperative Sagebrush Steppe Initiative - Butte Creek Project
- Cow Creek - Bassett Diversion Fish Passage Project
- HFQLG Forest Recovery Act, Pilot Project
- Hamilton City Levee Setback
- Iron Mountain Mine Superfund Cleanup
- Lassen Creek Stream and Meadow Restoration
- Lower American River Sunrise Side Channel Project
- Lower Clear Creek Floodway Rehabilitation
- Pit River Channel Erosion
- Red Bluff Diversion Dam Fish Passage Improvement
- Red Clover Creek Restoration Project
- Redding Allied Stream Team
- Sunflower Coordinated Resource Management Program
- Photo and Contributor Credits
- Roadmap Videos
- Conservation on Cache Creek
- Fixing Incised Creek Banks on the Feather River
- Flooding On The Sacramento River
- Google Earth Tour of Butte Creek
- Google Earth Tour of Cache Creek
- Google Earth Tour of the Feather River
- Google Tour of Northeast Subregion
- Google Tour of the American River Watershed and Truckee Watershed
- Google Tour of the Sacramento Mainstem
- Helicopter flight up the American River
- Resource Conservation in the Pit River watershed
- Restoring Fish Habitat on the Feather River
- Spring Run Salmon in Butte Creek
- Watershed work on the mainstem of the Sacramento River
- Wildfire Management in the Sacramento Watershed
- Sacramento River Basin Report Card
- Cover and Acknowledgements
- Table of Contents
- List of Acronyms
- Executive Summary and Report Card
- 1.0 Introduction and Background
- 2.0 Indicator Selection
- 3.0 Indicator Generation, Evaluation, Aggregation
- 3.1 Goal A: Water Quality and Supply
- 3.2 Goal B: Native biota
- 3.3 Goal C: Habitats and ecosystems
- 3.4 Goal D: Fire and Flooding
- 3.5 Goal E: Community, Social and Economic Conditions
- 3.6 Linkages and relationships among objectives, attributes, and indicators
- 4.0 General Methods and Principles
- 4.1. Reporting and analysis subwatershed units
- 4.2 Scoring: Distance to target/reference and scoring transformations
- 4.3 Trend/time series analysis
- 4.4 Confidence in Report Card findings
- 4.5 Spatial scale and aggregation of fine scale data to subwatershed
- 4.6 Temporal scale and aggregation
- 4.7 Cross-indicator score aggregation
- 4.8 Data management and transformation
- 5.0 Interpretation
- 6.0 Conclusions and Recommendations
- Appendix A: Glossary of Terms
- Appendix B: Indicator Selection Criteria
- SWIM Digital Atlas
- SWIM Digital Library
- Climate Change / Drought
- Invasive Plants
- Background on Invasive Plants
- Invasive Plants of the Sacramento River Watershed
- Invasive Plant Organizations
- Weed Management Areas
- Butte WMA
- Colusa, Glenn and Tehama WMA
- El Dorado County Invasive Weed Management Group
- Lake WMA
- Lassen County Noxious Weed SWAT Team
- Modoc WMA
- Napa County WMA
- Nevada/Placer WMA
- Plumas/Sierra Noxious WMA
- Sacramento WMA
- School Based Watershed Education - Upper Feather River
- Shasta WMA
- Siskiyou WMA
- Solano WMA
- Yolo WMA
- Yuba/Sutter WMA
- County Agriculture Departments
- Resource Conservation Districts
- State and Federal Agencies
- Non-Governmental Organizations
- Weed Management Areas
- Invasive Plant Mapping
- Responsible Landscaping
- On-Line Regulatory Permitting Guide
- Project Action Type
- Permit Type
- Site Type
- Permit Guide Glossary
- Rural Residential Development
- Current Uses, Plans, and Forecasts
- Model Projections and Scenarios
- Overview: Scenarios for 2050 using UPlan Model
- Overview: Case Studies Using Uplan SWIM Layers
- Background Primer on Rural Residential Development
- Adaption: Best Management Practices
- A Roadmap to Watershed Management
- Our Work
- Conferences and Workshops
- Monitoring Committee
- River of Words
- Journey through the Sacramento River Watershed
- Sacramento River Watershed Partners
The Northstate: A History of Flooding
(Above) National Ice & Cold Storage Co., Sutter County during 1950 flood. Online Archive of California
The Northstate has a long history of flooding. This flooding has led to costly damage. While efforts are being made to reduce risk, the reality is there will always be a possibility of flooding. Awareness is the first step to making sure that you reduce your risk as much as possible.
Check out the flood risk information provided by the Department of Water Resources:
- The Central Valley is home to more than 1,600 miles of State-Federal levees. In many areas protected by this levee system, the risk of flooding is greater than the risk of fire.
- Since 1950, flood disasters have been declared in every California county at least ten times, with some counties having as many as 29 state and federal disaster declarations.
- Since 1983, Central Valley State-Federal project levees have been breached and overtopped more than 70 times.
- Local, State and Federal agencies are continuing to improve the State-Federal project levee system. But, there will always be some flood risk.
- Just one foot of flood water can cause more than $54,000 in damages to a $150,000 single-family home and its contents in the Central Valley; three feet of flooding could cause more than $93,000 in damages.
Central Valley Flood Risk
Why is flood risk so high in California? This video explores the history, risk and local/federal efforts to reduce flooding in California with one of the world's largest flood risk reduction systems. Produced by the Sacramento District and the California Department of Water Resources. This video is part of the Corps of Engineers Flood Plain Management Services Program (FPMS) which funds projects that educate the public about flood hazards where they live and work and actions they can take to reduce property damage and prevent loss of life. FPMS also provides technical assistance to local governments and interested groups.
Northstate Flood Facts
Reported economic losses in Shasta County attributed to large flood events were reported to be $3,790,000 in 1970 and $10,650,000 in 1974. Actual losses are believed to have been much greater. (Source: Shasta County and City of Anderson Multi-Jurisdictional Hazard Mitigation Plan)
There have been a total of 17 state and federally declared flood disasters in Shasta County between 1950 and 2009. The most recent of which included individual assistance for flooding in South Redding along Olney Creek in 2006. (Source: Shasta County and City of Anderson Multi-Jurisdictional Hazard Mitigation Plan)
Since 1950, the State of California has proclaimed Tehama County in nine states of emergency due to flooding. (Source: Tehama County Flood Mitigation Plan)
Trinity County has experienced major storm and flood events in 1955, 1964, 1972, 1974, and 1997. (Source: Trinity County Property Owners Flood Safety)
Flooding in a Drought: What’s the Risk? Plenty!
(Above) Churn Creek Bottom Area, Shasta County, CA Dec. 2014 (Photo: NRCS Redding Field Office)
California is currently experiencing a prolonged period of drought. It’s easy to forget the winter rains that that we’ve come to know and love/dread so much. Flooding though, is possible even in drought years. Parched soil takes time to absorb rain. If rain comes suddenly, water won’t have time to absorb into the ground and will instead runoff where ever is the path of least resistance. If drainages are undersized or clogged with debris, significant amounts of water can end up where you don’t want it.
Roads, driveways, outbuildings and even your home can be inundated by floodwaters.
Like a buildings rain gutters, drainages need to be kept free of debris. If the drainage is large, work with your neighbors to develop a plan. Make sure to get any needed permits before doing work. To learn about permits, go to SRWP Online Permitting Guide.
The Positive Side of Flooding
It’s important to remember that flooding is natural. Healthy watersheds provide for the capture, storage and safe release of precipitation. These areas can provide additional benefits such as protecting critical habitat, enhancing natural or cultural resources and/or providing recreation opportunities.
Communities across the country are choosing property acquisition as a mitigation option for areas that repeatedly flood. These communities benefit from programs that provide funding and technical assistance to change hazards into community assets. These resources are available to your community as well!
Learn how your community can participate in property acquisition projects by reviewing FEMA’s Property Acquisition Handbook for Local Communities.
Resources For More Information
FloodSAFE California. California’s initiative to reduce flood risk.
FloodSmart. The official site of the National Flood Insurance Program.
National Public Service Campaign. Website on preparing for disasters.
Managing Flood Risk: A Guide for Successful Mitigation. Guide on how to engage community and build partnerships, develop competitive grant proposals, & seek funding from state and federal agencies to address flood risk issues.
Flooding on the Sacramento River. Video discussing historic flooding along the Sacramento River and why we need to adapt management efforts for the future.
Protect Your Property from Flooding. Publications from FEMA.