McCormack-Williamson Tract Levee Modification and Habitat Restoration Project – Phase B, SEIR Addendum No. 1

McCormack-Williamson Tract Levee Modification and Habitat Restoration Project – Phase B, SEIR Addendum No. 1

The modifications and refinements include adjustments to the proposed levee modifications and habitat restoration activities originally proposed as part of the Phase B Project. The modifications include placing sediment generated by levee degrades into cells within the northwest corner of MWT, which would create new areas for riparian habitat mitigation to offset impacts from the 2023 Phase B project. Degrading the MWT Southwest Levee to approximately elevation 2.5 ft (a higher elevation than was previously proposed). Completing the remaining work to repair the MWT west levee section to the pre-breach elevation. Creating Beneficial Re-use of Material and Riparian Planting Areas by using sediment and dry material generated from excavation activities for levee modifications and would create new riparian and riparian scrub shrub habitat. Lastly, cutting the existing berm around the scour pond on the east side of the MWT to maintain hydraulic connection.

unincorporated area

Sacramento

Countywide, Northern California

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 Parks and Recreation, California Department of State Parks, Division of Boating and Waterways, 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 Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB), California San Joaquin River Conservancy (SJRC), 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 Water Quality, State Water Resources Control Board, Division of Water Rights, State Water Resources Control Board, Divison of Financial Assistance

Other (Ecological restoration)

Ecological restoration

Biological Resources, Hydrology/Water Quality