Williams Partners L.P., formerly Access Midstream Partners, L.P, is an energy infrastructure master limited partnership with operations across the natural gas value chain. The Company's segments include Central, Northeast G&P, Atlantic-Gulf, West, and NGL & Petchem Services. Its Central segment provides domestic gathering, treating, and compression services to producers under long-term, fixed fee contracts. Northeast G&P segment includes natural gas gathering and processing, and NGL fractionation businesses in the Marcellus shale region primarily in Pennsylvania, New York, and West Virginia and Utica shale region of eastern Ohio. The Atlantic-Gulf segment includes its interstate natural gas pipeline, Transcontinental Gas Pipeline Company, LLC. Its West segment includes natural gas gathering, processing and treating operations in New Mexico, Colorado, and Wyoming. The NGL & Petchem Services segment includes the Company's interest in an olefins production facility in Geismar, Louisiana.