MYRTLE BEACH, S.C. - It's called gumbo and its delaying traffic on a busy highway in Myrtle Beach

The Sun News reports the material is a sticky soil about 60 feet beneath the ground. And it's delaying completion of a new interchange where the U.S. 17 bypass crosses South Carolina Route 707.

The $122 million project has been years in the making and highway officials had hoped to have the bridge crossing 707 open by now.

But because of a wet spring and summer, the ground hasn't settled and crews have been unable to pave the bridge approaches.

Highway officials now hope to have the bridge open in October. It will carry about 70,000 vehicles a day during the summer season.

Myrtle Beach is the heart of the state's $18 billion tourism industry.