Central Valley Flood Protection Plan

Central Valley Flood Protection Plan
Name	Central Valley Flood Protection Plan
Jurisdiction	California
Authority	California Department of Water Resources
Region	Central Valley

Contents

Central Valley Flood Protection Plan is a multi-decade strategic framework developed for flood risk reduction in California's Central Valley. It was prepared under the authority of the California Department of Water Resources to coordinate investment, regulatory actions, and infrastructure upgrades across federal, state, and local agencies including the United States Army Corps of Engineers, Federal Emergency Management Agency, and regional bodies such as the Sacramento Area Flood Control Agency and Yolo County Flood Control and Water Conservation District. The plan integrates scientific assessment, engineering, environmental review, and policy instruments involving stakeholders from City of Sacramento, Yuba County, San Joaquin County, Fresno County, and other jurisdictions.

Overview

Origins trace to historic flood events involving the Great Flood of 1862, the 1955 Columbia River floods (as comparative study), and major storms impacting the Sacramento River and San Joaquin River. Legislative impetus arose from the Central Valley Flood Protection Act of 2008 and subsequent amendments debated in the California State Legislature and Executive Office of the Governor of California. Technical development drew upon work by engineering firms, academic institutions like the University of California, Davis, Stanford University, and California State University, Sacramento, and consultants who collaborated with agencies including the United States Army Corps of Engineers and FEMA Region IX. Public engagement involved stakeholders from municipalities such as Stockton, California, Redding, California, Chico, California, Bakersfield, California, and tribes such as the Maidu, Yurok, and Patwin.

Primary objectives emphasize reducing flood risk for population centers including Sacramento, California, Stockton, California, Modesto, California, and Fresno, California while protecting critical infrastructure like the Interstate 5, State Route 99, Union Pacific Railroad, and Central Valley Project facilities. The Plan targets coordination with California Environmental Quality Act compliance, restoration priorities from agencies such as the California Coastal Conservancy and The Nature Conservancy, and resilience measures related to climate change impacts documented by the Intergovernmental Panel on Climate Change and California Climate Action Registry. It sets goals for integrated floodplain management consistent with guidance from the Association of State Floodplain Managers and the American Society of Civil Engineers.

Risk assessment uses hydrologic and hydraulic modeling tools developed with datasets from the USGS National Water Information System, NOAA National Weather Service, and California Irrigation Management Information System. Models reference historic events including the 1862 flood and incorporate scenarios informed by the Fourth National Climate Assessment, paleoflood research, and the California Nevada River Forecast Center. Probabilistic analyses adhere to methodologies from the United States Army Corps of Engineers Hydrologic Engineering Center and peer-reviewed literature from institutions like Lawrence Berkeley National Laboratory and Scripps Institution of Oceanography. Mapping integrates the FEMA Flood Insurance Rate Map program and the National Hydrography Dataset to prioritize communities such as McClellan Park and infrastructure including the Folsom Dam and New Melones Dam.

Recommended actions include levee system upgrades along the Sacramento River Flood Control Project, bypass construction such as the Yolo Bypass, setback levees near Colusa Basin, floodplain reconnection in the Sutter Bypass, and stormwater improvements in urban areas like West Sacramento. Coordination with federal projects under the Water Infrastructure Finance and Innovation Act and Public Law 84-99 rehabilitation program is emphasized. Nature-based solutions involve riparian restoration with partners like the California Department of Fish and Wildlife, Audubon California, and Sierra Club San Joaquin Valley Group. Specific infrastructure references include work near Miller Park, Natomas Basin, and diversion facilities serving the Delta-Mendota Canal.

Environmental review considers effects on species protected under the Endangered Species Act, including mitigation for habitat of species such as the Delta smelt, Chinook salmon, steelhead trout, and avifauna protected by the Migratory Bird Treaty Act. Social impacts examine displacement risks in communities like South Sacramento, environmental justice concerns raised by advocacy groups including the Environmental Justice Coalition for Water, and economic assessments involving the California Chamber of Commerce and labor partners like the International Brotherhood of Teamsters. Cultural resource assessments coordinate with the National Park Service and tribal governments including Yocha Dehe Wintun Nation.

Governance structures rely on the Central Valley Flood Protection Board, regional flood management plans overseen by county flood control districts, and interagency memoranda with entities such as the U.S. Army Corps of Engineers and FEMA. Funding mechanisms combine state bonds like those authorized under various California ballot propositions (including past measures supported by the League of California Cities), federal appropriations through the U.S. Congress, and local assessments administered by agencies such as the Sacramento Municipal Utility District where relevant. Implementation timelines coordinate with programs from the California Strategic Growth Council, grant opportunities from the National Fish and Wildlife Foundation, and technical assistance by the Natural Resources Conservation Service.

Category:Flood control in California Category:Central Valley (California)