The U.S. Army Corps of Engineers, Los Angeles District has completed a Final Supplemental Environmental Assessment (SEA) for the Channel Islands Harbor breakwater and jetty repair project.

In the SEA, USACE proposes to install three sets of concrete staircases, replace in kind the existing navigational aid concrete pad on the breakwater, and excavate approximately 25,000 cubic yards of shoaled sediments in the lee of the detached breakwater to a depth of -15 feet mean lower low water (MLLW), with a 2 foot allowable over-depth.