A large cargo ship lost control of its engines and went nearly full throttle through a South Carolina harbor Wednesday, prompting the closure of one of the busiest bridges in the state.

Harbor pilots were able to help the nearly 1,000-foot (300-meter) ship, which was going nearly 20 mph (32 kmh), get under the Ravenel Bridge safely and eventually anchor several miles offshore while the Coast Guard investigates, said Randy Preston, commander of the U.S. Coast Guards Charleston Section.

Police cleared traffic, cyclists and pedestrians from the eight-lane bridge before the ship arrived, keeping it closed for 10 minutes as the Michigan 7 steamed underneath, authorities said.

The only damage was caused by the giant ships wake, which knocked aground a small boat and caused minor injuries to two people, Preston said.