The Southern Towing Company specialized in transporting bulk liquid fertilizer products throughout the Mississippi River System and the Gulf Intracoastal Waterway.

The company also provided towing services for several other commodities including refined petroleum, chemicals, coal, grain and aggregates.

In 2021, the Southern Towing Company acquired the Devall Towing Company of Sulphur, Louisiana, with the Devall Towing Company continuing operation under the Devall name, as a new division of Southern Towing Company.

In 2023, Devall Towing and Southern Towing Company (STC) fully integrated their operations and management under the name of the Southern Devall Towing Company of Sulphur, Louisiana.