Northbound U.S. Highway 17 near Doar Road was closed because a one-car fatal accident may have damaged pilings supporting a bridge over Awendaw Creek, officials said late Saturday night.
A state Department of Transportation bridge inspector visited the site at about 10 p.m., said Sheriff's Office Chief Inspector Chris Brokaw.
Northbound U.S. 17 traffic was turned-back before the bridge. Southbound U.S. 17 at Awendaw Creek had re-opened, he said.
Divers found one person dead inside a car flipped upside down in about four-feet of water in Awendaw Creek.
The identity of the person was not immediately available. The vehicle was traveling south on U.S. 17, he said.
Officials searched the area to rule out the possibility that others were in the car. So far, no more bodies have been found, Brokaw said.
The incident, which happened at about 4:47 p.m., blocked traffic on U.S. 17 in both directions for several hours.
The Charleston County Sheriff's Office reported that the bridge was open in both directions at 11:30 p.m.
U.S. 17 in that area has daily traffic of about 10,000 vehicles, according to the DOT.
A Coast Guard helicopter crew, state Department of Natural Resources officials, Charleston County Volunteer Rescue Squad and Awendaw, Mount Pleasant and Isle of Palms fire departments responded to the accident.