Santa Ana River: Reach 9 Phase 5B

4 Documents in Project


SCH Number
Lead Agency
United States Army, Army Corps of Engineers (USACE)
Document Title
Santa Ana River: Reach 9 Phase 5B
Document Type
ADM - Addendum
Present Land Use
Open Space-general
Document Description
Note: Review per lead. The U.S. Army Corps of Engineers proposes to modify a bank protection structure within Reach 9 of the Santa Ana River that was approved for construction in 2015. Modifications include deleting the upstream-most segment of the planned structure, and expanding staging areas. Location of a permanent maintenance road has also been clarified. Phase 5B is located in the City of Yorba Linda, Orange County. The purpose of the project is to prevent undercutting and erosion of Santa Ana River embankment, caused by high-velocity flows and associated scour. This SEA/EIR Addendum supplements a 2015 document that also addressed bank and bridge protection in other areas of Reach 9 (Phase 4, Phase SA and BNSF Bridge).

Contact Information

Hayley Lovan
Agency Name
U.S. Army Corps of Engineers
Contact Types
Lead/Public Agency


Corona, Orange, Yorba Linda
Orange, Riverside
Cross Streets
Gypsum Canyon Road and East La Palma Avenue, Yorba Linda, OC
Total Acres
State Highways
SR-91, 71, 241
Santa Ana River

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Parks and Recreation, California Department of Transportation, District 12 (DOT), California Highway Patrol, California Native American Heritage Commission (NAHC), California Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB), California State Lands Commission (SLC), Department of Water Resources, Resources Agency
Development Types
Other (Flood Protection)
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Economics/Jobs, Flood Plain/Flooding, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Noise, Public Services, Recreation, Transportation, Vegetation, Wetland/Riparian

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 or via phone at (916) 445-0613.

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