Grimes Floodplain Restoration and Levee Resiliency Project

2 Documents in Project


SCH Number
Lead Agency
Sacramento River West Side Levee District
Document Title
Grimes Floodplain Restoration and Levee Resiliency Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Exclusive Agriculture, River Frontage, Rural Residential (2-acre minimum lot), Residential Single-Family (8,000- square foot minimum lot), and Community Commercial.
Document Description
SRWSLD, with funding from the California Department of Water Resources (DWR), is proposing this project, which would consist of constructing a 1.8-mile-long slurry cutoff wall in the existing Sacramento River West Bank Levee System (SRWBLS), encroachment remediation, waterside hardening, establishment of an operations and maintenance area, and restoration of approximately 11 acres of floodplain for salmonids. DWR investigations have determined that the section of the SRWBLS north and south of, and directly adjacent to, the town of Grimes in Colusa County is vulnerable to seepage. Currently, Grimes is not mapped within a Federal Emergency Management Agency (FEMA) special flood hazard area; however, FEMA has initiated a remapping process for Colusa County. Initial results indicate that without remediation of the Sacramento River levees, FEMA will model the area assuming no levees are present. The goal of the proposed project is to increase flood resiliency to a 100-year level of flood protection to the town of Grimes in a manner consistent with the 2012 Central Valley Flood Protection Plan and its 2017 update, including investments in multi-benefit flood projects (e.g., improvement of salmonid habitat). The construction phase will begin once SRWSLD secures a state or federal implementation grant. Construction is anticipated to begin no earlier than 2024.

Contact Information

Meegan Nagy
Agency Name
Sacramento River West Side Levee District
Job Title
Deputy Manager
Contact Types
Lead/Public Agency


Community of Grimes
Northern California
Cross Streets
Total Acres
Parcel #
State Highways
State Highway 45
Three private airstrips
Grand Island Elementary School
Sacramento River
Other Location Info
Other Information

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Fish and Wildlife, North Central Region 2 (CDFW), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of State Parks, Division of Boating and Waterways, California Department of Transportation, District 3 (DOT), California Department of Transportation, Division of Aeronautics (DOT), California Department of Transportation, Division of Transportation Planning (DOT), California Department of Water Resources (DWR), California Governor's Office of Emergency Services (OES), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Public Utilities Commission (CPUC), California State Lands Commission (SLC), Central Valley Flood Protection Board, Delta Protection Commission, Delta Stewardship Council, Department of Toxic Substances Control, Office of Historic Preservation, State Water Resources Control Board, Division of Water Quality, California Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB)
State Reviewing Agency Comments
California Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB)
Development Types
Other (Habitat restoration and flood control improvements)
Local Actions
Habitat restoration and flood control
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Energy, Flood Plain/Flooding, Geology/Soils, Greenhouse Gas Emissions, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Solid Waste, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wetland/Riparian, Wildfire
Local Review Period Start
Local Review Period End


Notice of Completion [NOC] Transmittal form
State Comment Letters [Comments from state reviewing agencies]

Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.

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