Johnson Cosumnes Mitigation Bank Floodplain Restoration Project

The Johnson Cosumnes Mitigation Bank Floodplain Restoration Project, managed by the Central Valley Flood Protection Board, involves the construction of a 204-acre mitigation bank in Sacramento County, California. Located at 8700 Twin Cities Road near the confluence of Laguna Creek and the Cosumnes River, the project aims to restore wetland, riparian, and riverine habitats within the Cosumnes River floodway. Of the total area, 200 acres are intended to qualify for mitigation bank credits. The scope of work includes selectively notching agricultural berms along the mainstem and west branch of the Cosumnes River, constructing shallow swales and secondary pilot channels to improve floodplain flow, and implementing erosion control and revegetation efforts. Additionally, the project requires the redistribution of 30,200 cubic yards of native material to create an undulating floodplain surface. This project is classified under NAICS code 237990 and is currently listed as a forecast with a posted date of September 12, 2025. It has been granted a statutory exemption from the California Environmental Quality Act under Section 21080.56, as it focuses on restoring habitat for native fish and wildlife, a status concurred with by the California Department of Fish and Wildlife. Administrative oversight is provided by the Central Valley Flood Protection Board and Sacramento County, with key points of contact including Jordan Robbins and Julie Newton.