EDISTO ISLAND -- Authorities responded to a small- vehicle wreck Sunday at the plantation property connected to former S.C. Treasurer Thomas Ravenel.

Ravenel was not reported injured, but his passenger was transported to the Medical University of South Carolina with potentially life-threatening injuries, said Maj. John Clark, public information officer for the Charleston County Sheriff's Office.

The vehicle involved was described as a four-wheel all-terrain vehicle or golf cart-type transport.

According to Clark, the vehicle flipped on the property at 2328 Laurel Hill Road, and the 51-year-old male who was riding with Ravenel was injured.

The victim, whose name was not released, is from Charleston, Clark said. He was airlifted to MUSC.

Attempts to reach Ravenel on Sunday were unsuccessful.

Drugs or alcohol are not believed to be involved in the incident, and Ravenel is not expected to be charged, Clark said.

The address given for the scene of the wreck is known as Brookland Plantation and is listed on the National Register of Historic Places.

Last year, Ravenel said he had put the property up for sale. The 3,440-square foot house, which he said is in "pristine" condition, was built in 1803 and served as an orphanage in the 1960s. Ravenel said he bought it in 2006 because he heard there was an effort to subdivide the 60-acre Laurel Hill Road property, and he wanted to save it.

Ravenel was elected treasurer in 2006 but resigned his post in July 2007 and later served 10 months in federal prison after pleading guilty to conspiracy with intent to distribute cocaine.