The U.S. Army Corps of Engineers, Chicago District, is releasing the Draft Supplemental Environmental Assessment and Initial Study/Mitigated Negative Declaration (SEA/IS/MND) for the Santa Ana River Mainstem, Santiago Creek, Orange County, California (SARM) for a 60-day public review. The 60-day public review period will be held from Friday, September 15, 2023 through Tuesday, November 14, 2023. As part of the public review period, USACE would appreciate any comments or concerns you might have associated with this work. The Draft SEA/IS/MND is available at the following location: https://www.lrc.usace.army.mil/Missions/Civil-Works-Projects/Santiago-Creek/. Comments on the adequacy of the draft environmental documents may be submitted via email or mail. Emailed comments should be sent to santiago_comments@usace.army.mil. Mailed comments should be sent to the attention of Mr. Michael Padilla (CELRC-PDB-D) at the U.S. Army Corps of Engineers, 231 South LaSalle Street, Suite 1500, Chicago, IL 60604. All comments should be postmarked or emailed by November 14, 2023. A public meeting will be held on October 2, 2023 from 6:30 to 8:30 pm at the County Conference Center, 601 N. Ross Street, Santa Ana, CA 92701. There will be an opportunity during the public meeting to submit verbal and/or written comments on the adequacy of the draft environmental documents.