Santiago Creek Project


SCH Number
Lead Agency
Orange County
Document Title
Santiago Creek Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Document Description
This objective of the Santiago Creek project is to safely pass the 1% annual chance of exceedance flood event (100-year storm). The project consists of slope stabilization improvements to the Bond, Blue Diamond, and Smith Basins to reduce the risk of erosion during flood events, and improvements to the Santiago Creek channel downstream of Interstate 5 to the confluence of the creek with the Santa Ana River for erosion protection and conveyance.

Contact Information

Cindy Salazar
Agency Name
County of Orange, OC Public Works, Development Services/Planning
Job Title
Land Use Manager
Contact Types
Lead/Public Agency


Orange, Santa Ana, Unincorporated Orange County, Villa Park
Other Location Info
Cities of Orange, Santa Ana, Villa Park

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Conservation (DOC), 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 12 (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 Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB), California State Lands Commission (SLC), 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, Department of Toxic Substances Control, California Department of Fish and Wildlife, South Coast Region 5 (CDFW)
State Reviewing Agency Comments
Department of Toxic Substances Control, California Department of Fish and Wildlife, South Coast Region 5 (CDFW)
Development Types
Other (Flood protection)
Local Actions
Flood protection improvement
Project Issues
Aesthetics, Air Quality, Biological Resources, Drainage/Absorption, Flood Plain/Flooding, Noise
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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