Santa Ana River: Reach 9 Phase 5A

4 Documents in Project


SCH Number
Lead Agency
U.S. Army Corps of Engineers
Document Title
Santa Ana River: Reach 9 Phase 5A
Document Type
ADM - Addendum
Present Land Use
Open Space-general

Document Description
Note: FYI 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
Chris Jones
U.S. Army Corps of Engineers
915 Wilshire Boulevard, Ste 930
Los Angeles, CA 90017

Phone : (213) 304-6234


33°52'44."N 117°44'35"W
Corona Orange Yorba Linda
Cross Streets
Weir Canyon Rd and East La Palma Ave, Yorba Linda, OC
Total Acres
State Highways
SR-91, 241
Santa Ana River

Notice of Completion

Review Period Start
Review Period End
Development Type
Other (Flood Protection)
Project Issues
Aesthetic/Visual Agricultural Land Air Quality Archaeologic-Historic Biological Resources Economics/Jobs Flood Plain/Flooding Geologic/Seismic Noise Public Services Recreation/Parks Soil Erosion/Compaction/Grading Toxic/Hazardous Traffic/Circulation Vegetation Water Quality Water Supply Wetland/Riparian Land Use Cumulative Effects
Reviewing Agencies
California Department of Conservation California Department of Fish and Wildlife, South Coast Region 5 California Department of Parks and Recreation California Department of Transportation, District 12 California Highway Patrol California Native American Heritage Commission California Public Utilities Commission California Regional Water Quality Control Board, Santa Ana Region 8 California State Lands Commission Department of Water Resources Office of Emergency Services, California Office of Historic Preservation Resources Agency State Water Resources Control Board, Division of Water Quality

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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