On November 7, 2007, a Chinese cargo ship collided with the Bay Bridge. The Cosco Busan, heading for South Korea from Oakland, spilled 58,000 gallons of fuel into the San Francisco Bay. The bridge was not significantly damaged and this was possibly the first such accident involving the Bay Bridge. The ship struck the Delta tower on the west span, just west of Yerba Buena Island.
By that evening, several Bay Area beaches were closed and 8,000 gallons of fuel were reportedly contained, according to the U.S. Coast Guard. The U.S. Department of Fish and Game's special oil spill unit had begun cleaning.
The Coast Guard issued a press release about the accident that can be found here.