Energy Transfer Partners, L.P. is engaged in the natural gas midstream, and intrastate transportation and storage businesses in the United States. The company?s Midstream segment gathers, compresses, treats, blends, processes, and markets natural gas in various basins and shales in Texas, New Mexico, West Virginia, and Louisiana. This segment owns and operates approximately 6,700 miles of natural gas gathering pipelines. Its Intrastate Transportation and Storage segment transports natural gas from various natural gas producing areas, as well as through its ET fuel system and HPL system. This segment has approximately 7,800 miles of natural gas transportation pipelines and 3 natural gas storage facilities in Texas. The company?s Interstate Transportation and Storage segment provides natural gas transportation and storage services; owns and operates approximately 12,800 miles of interstate natural gas pipeline; and has interests various natural gas pipelines. The company?s Natural Gas Liquid (NGL) Transportation and Services segment transports mixed NGLs and other hydrocarbons; stores mixed NGLs, NGL products, and petrochemical products; and separates mixed NGL streams into purity products. This segment owns and operates various NGL pipelines, as well as NGL storage facilities with aggregate storage capacity of approximately 47 million barrels. Its Investment in Sunoco Logistics segment gathers, purchases, markets, and sells crude oil primarily in the mid-continent United States; and owns and operates approximately 2,500 miles of refined products pipelines in the United States. The company?s Retail Marketing segment sells gasoline and middle distillates at retail; and operates convenience stores. Energy Transfer Partners, L.P. was founded in 2002 and is based in Dallas, Texas.