Being in operation since 1962, Florida Rock and Tank Lines Inc. is one of the leading bulk tank carriers in the United States. Based in Panama City, Fla., it transports petroleum and other liquid and dry bulk commodities. The firm operates 19 terminals in addition to various truck domicile locations throughout the Southeast. Florida Rock and Tank Lines Inc. is composed of more than 400 tractors and 500 trailers. The company is a part of the transportation group under the parent company, Patriot Transportation Holding Inc.