It is operated by Trunkline Gas Company, a subsidiary of Energy Transfer Partners.
[2] In 2012, it was announced that a 770-mile (1,240 km) section of the pipeline will be converted to crude oil pipeline to transport Canadian and Bakken oil from Patoka, Illinois, to St. James, Louisiana.
[4] In 2014, the Energy Transfer Crude Oil Pipeline Project (ETCOP) was announced.
ETCOP will use 678 miles (1,091 km) of the existing 30-inch (760 mm) Trunkline, which will be converted and reversed.
The pipeline runs through Illinois, Kentucky, Tennessee, Mississippi, Arkansas, and Louisiana, and its terminus will be near Nederland, Texas.