Lower Cosumnes Floodplain Restoration Project - Cougar Wetlands

2 Documents in Project


SCH Number
Lead Agency
Sacramento County
Document Title
Lower Cosumnes Floodplain Restoration Project - Cougar Wetlands
Document Type
MND - Mitigated Negative Declaration
Present Land Use
managed wetland preserve/AG-80/Ag crop land
Document Description
The proposed project consists of grading of land to restore a more natural, historic hydrological regime and riparian floodplain habitat and function at the Cougar Wetland Unit. The proposed project would be achieved by reconnecting the historic floodplain habitat and topography through the creation of levee breaches and a small portion of some of the historic slough channels that once existed within the Cosumnes Sink. In total, the project site consists of approx 154 acres within the Cosumnes River Preserve, of which only 8 acres will be actively disturbed. One international levee breach will be created along the Cosumnes River at the southern end of the Cougar Wetland Unit. The breach width will be approx 40 ft wide at the peak of the existing levee, and approx 15 ft wide at the river's streambed or flow line. The main slough channels and smaller side channels will be engineered to maintain positive drainage in order to prevent the stranding of native fish species within the newly restored waterways. An estimated total of one mile of slough channels would be created within the Cougar Wetland Unit. In total, approx 20,500 cy of soil will be moved within the project site and 5,000 cy of stripping's (large wood material) will be hauled off-site.

Contact Information

Todd Smith
Agency Name
Sacramento County
Contact Types
Lead/Public Agency


Cross Streets
Orr Rd/Twin Cities Rd
Total Acres
Parcel #
146-0320-006, 008
State Highways
Western Pacific
Cosumnes River

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
Cal Fire, California Department of Fish and Wildlife, North Central Region 2 (CDFW), California Department of Parks and Recreation, California Highway Patrol, California Native American Heritage Commission (NAHC), California Public Utilities Commission (CPUC), California State Lands Commission (SLC), Delta Protection Commission, Delta Stewardship Council, Department of Water Resources, Office of Historic Preservation, Resources Agency, Central Valley Flood Protection Board, California Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB)
State Reviewing Agency Comments
Central Valley Flood Protection Board, California Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB)
Development Types
Other (wetland restoration)
Local Actions
Grading Permit
Project Issues
Cultural Resources, Flood Plain/Flooding, Geology/Soils, Hydrology/Water Quality, Transportation, Vegetation, Wetland/Riparian, Wildlife

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.

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