Aged jetties and the offshore breakwater at the Channel Islands Harbor entrance will receive much needed repairs in the coming months.
The Los Angeles District of the U.S. Army Corps of Engineers has funded a project to conduct repairs to two parallel entrance jetties and the protective offshore breakwater near the entrance of the Harbor. This week, Connolly Pacific mobilized equipment – a crane-equipped barge, support vessels, and a storage barge – and the project is underway.
Due to the nature of this project, the Corps, the Harbor Department, and Connolly Pacific continue to coordinate safety concerns. For public safety, measures are incorporated including posted signs and limiting access within construction site. Also, the Harbor Patrol and the U.S. Coast Guard are assisting in monitoring the working zone to ensure safe navigation in the channel.
Repair work will consist of replacing approximately 30,000 tons of new armor stone and resetting armor stone as needed. Repairs will be conducted by a barge-mounted crane, barges carrying rock, and other various support vessels. The project is estimated to last until mid-September 2021, but could change depending on weather. Work will be conducted from 7 a.m. to 7 p.m., Monday thru Saturday, during the life of the project.
Why Is It Needed?
The project is needed to ensure navigational safety and to prevent further degradation of the structural integrity of the jetties and breakwater. If no work were scheduled on the jetties and breakwater, eventual Harbor closures could result, which would result in a loss to recreational and commercial operations. The last time major maintenance was completed was 1996 to address damages from the 1982-83 storm season and the 1994 Northridge earthquake, according to the U.S. Army Corps of Engineers.
“We couldn’t be more pleased that this important project is taking place this year,” said Mark Sandoval, Ventura County Harbor Department Director. “This project is protecting and preserving the Harbor’s recreational and economic value.”
The repair project not only benefits the Channel Islands Harbor, but neighboring communities as well. The detached breakwater serves to suspend littoral transport and create sand trap up coast of the Harbor entrance channel. This material is used to nourish the eroding shoreline down coast from the Port of Hueneme, and provides protection to private, public, and Federal lands from further erosion.
According to the U.S. Army Corps of Engineers, the Channel Islands Harbor Breakwater and Jetty Repair project consists of typical maintenance work to repair the detached breakwater and entrance channel jetties to their original condition and functionality. The structures were built in the early 1960’s to protect the harbor. The repair areas identified have the same existing footprint as the original construction and are not an enhancement or modification. Repairs to the south jetty are expected to have no impacts to local sediment transport patterns, no impacts to the existing wave regime adjacent the south jetty, and therefore no impacts to the quality of surf at this location.
For more information on the project, please visit the U.S. Army Corps of Engineers project page here: https://www.spl.usace.army.mil/Media/Public-Notices/Article/2604838/spl-2021-0512-nlh-channel-islands-harbor-breakwater/
Editor’s Note: this story was published on May 6, 2021 and edited on June 3, 2021.