Through Panhandle Energy, headquartered in Houston, Southern Union owns and operates 100 percent of Panhandle Eastern Pipe Line Company, Trunkline Gas Company, Sea Robin Pipeline Company, Southwest Gas Storage Company and Trunkline LNG Company. Through CCE Holdings, Southern Union also owns an interest in and operates Transwestern Pipeline Company and 50 percent of Citrus Corp. Southern Union s pipeline interests operate nearly 18,000 miles of interstate pipelines that transport natural gas from the San Juan, Anadarko and Permian Basins, the Rockies, the Gulf of Mexico, Mobile Bay, South Texas and the Panhandle regions of Texas and Oklahoma to major markets in the Southeast, West, Midwest and Great Lakes region. Southern Union Company, which acquired Panhandle Energy in June of 2003 and CrossCountry Energy in November of 2004, is engaged primarily in the transportation, storage and distribution of natural gas.