Williams Partners L.P. operates as an energy infrastructure company. It operates through five business segments: Access Midstream; Northeast G&P; Atlantic-Gulf; West; and NGL & Petchem Services. The Access Midstream segment provides gathering, treating, and compression services to producers in the Marcellus and Utica shale plays, as well as the Eagle Ford, Haynesville, Barnett, Mid-Continent, and Niobrara areas. The Northeast G&P engages in the natural gas gathering and processing, and NGL fractionation businesses in the Marcellus and Utica shale regions. The Atlantic-Gulf segment engages in the interstate natural gas pipeline operations; and natural gas gathering and processing, and crude oil production handling and transportation businesses. The West segment engages in the natural gas gathering, processing, and treating operations in New Mexico, Colorado, and Wyoming, as well as operates the interstate natural gas pipeline and Northwest Pipeline. The NGL & Petchem Services segment engages in the operation of an olefins production facility in Geismar, Louisiana; an RGP splitter; various petrochemical and feedstock pipelines in the Gulf Coast region; an oil sands offgas processing plant near Fort McMurray, Alberta; an NGL/olefin fractionation facility and butylene/butane splitter facility in Redwater, Alberta; and an NGL fractionator near Conway, Kansas. WPZ GP LLC serves as the general partner of the company. The company was founded in 2005 and is based in Tulsa, Oklahoma. Williams Partners L.P. is a subsidiary of Williams Companies, Inc.