THE SAND BERM IS COMPLETE AT OCEAN BEACH
The much-anticipated U.S. Army Corps of Engineers Beneficial Use project at Ocean Beach is complete!
This Ocean Beach Continuing Authorities Program Section 204 comprises building a sand berm on property owned by Golden Gate National Recreation Area in front of 3,000 feet of the bluff south of Sloat Boulevard using sand dredged from the San Francisco Main Ship Channel. The project goal is to protect the Great Highway and wastewater infrastructure maintained by the City and County of San Francisco, Public Utilities Commission. Using about 255,300 cubic yards of clean sand, the berm, which is on Golden Gate National Recreational Area property, is placed against the bluff and extends seaward about 200 feet (sand wasn't placed to the bluff top in areas where bank swallow burrows are present). Construction took approximately 30–40 days, during which time that stretch of beach was closed to the public, and access to the beach south of the work area was restricted by limited access. Access to the area will be restored after construction ends.
This project was managed by the U.S. Army Corps of Engineers at the request of the City and County of San Francisco, in partnership with the Golden Gate National Recreation Area, with costs being co-shared by the Corps and the City. This project reached construction through the hard work and determination of countless community members, local and national leaders, and partner organizations. We appreciate your patience during this beneficial-use, climate change adaptation project.
Dredging of the San Francisco main ship channel
The Golden Gate, the strait connecting San Francisco Bay to the Pacific Ocean, is the only marine passage between the two water bodies. Tidal currents, which accelerate through erosion-resistant bedrock in the strait, have created a narrow channel, reportedly 374 ft deep, which makes it one of the deepest natural channels in the world. Seaward of the Golden Gate is a massive ebb tidal delta (the San Francisco Bar). Because the depth at the bar crest is less than 30‑ft in many places, the Corps maintains a 55‑ft deep channel through it as part of the San Francisco District’s annual dredging program. On average, about 350,000 cubic yards of clean, beach-compatible sand is dredged each year. That sand is placed atop the bar (SF–8) or immediately offshore of south Ocean Beach (OBDS).