McCormack-Williamson Tract 2026 Levee Erosion Repair Project Sites 1–14

McCormack-Williamson Tract 2026 Levee Erosion Repair Project Sites 1–14

The proposed project would repair 14 outboard (waterside) erosion sites on McCormack-Williamson Tract (MWT), a North Delta island. The repairs are proposed to address existing erosion, protect existing infrastructure, maintain MWT access, reduce the risk of uncontrolled breaches, and protect investments that the Department of Water Resources and Reclamation District 2110have made on MWT. The erosion repair sites are along the outboard perimeter of MWT at Dead Horse Cut, Snodgrass Slough, Lost Slough, and the East Levee, ranging from 50 to 250 feet in length. These erosion repair sites would be repaired to address bank loss, toe scour, and erosion. The repairs would entail flattening the waterside levee slope, placing imported riprap to re-establish the bank slope and channel, and constructing a toe berm. To address vegetation effects from erosion repairs and result in no net loss of sensitive or protected habitat, in-water planting benches would be constructed onsite as part of the proposed project. The repairs would entail placing material within the original configuration of the levees before erosion and following the current standard of practice for rural levee erosion repairs.

Walnut Grove

Sacramento

Northern California, Unincorporated

California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), 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 Resources Recycling and Recovery, California Department of Toxic Substances Control (DTSC), California Department of Transportation, District 3 (DOT), California Department of Water Resources (DWR), California Fish and Game Commission (CDFGC), 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 Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB), California State Lands Commission (SLC), Central Valley Flood Protection Board, Delta Protection Commission, Delta Stewardship Council, Office of Historic Preservation, State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Drinking Water, District 9, State Water Resources Control Board, Division of Water Quality, State Water Resources Control Board, Division of Water Rights, State Water Resources Control Board, Divison of Financial Assistance

Other (Levee repair)

Levee repair

Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Flood Plain/Flooding, Geology/Soils, Greenhouse Gas Emissions, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wetland/Riparian