Rock Hazard in Bay Won’t Be Removed

From Times Staff and Wire Reports

Four jagged underwater rocks that have threatened boats and oil tankers in San Francisco Bay for centuries will not be removed or carved down, the U.S. Army Corps of Engineers said.

After three years of study, the corps concluded it would be too expensive to remove the rocks, some of which lie only 36 feet below the surface between Alcatraz Island and the Golden Gate Bridge.

About 750 oil tankers, with hulls that protrude more than 50 feet underwater, pass within hundreds of yards of the rocks every year.