Williams Partners L.P., an energy infrastructure company, focuses on connecting North America?s hydrocarbon resource plays to growing markets for natural gas and natural gas liquids (NGL). It operates in Northeast G&P, Atlantic-Gulf, West, and NGL & Petchem Services segments. The Northeast G&P segment includes midstream gathering and processing businesses in the Marcellus and Utica shale regions; and a 51 percent equity investment in Laurel Mountain Midstream, LLC, as well as a 47.5 percent equity investment in Caiman Energy II, LLC. The Atlantic-Gulf segment is engaged in the interstate natural gas pipeline, natural gas gathering and processing, and crude oil production handling and transportation activities in the Gulf Coast region; and equity investment activities. The West segment is involved in gathering, processing, and treating operations in New Mexico, Colorado, and Wyoming, as well as the operation of interstate natural gas pipeline. The NGL & Petchem Services segment operates NGL and natural gas marketing businesses, as well as an NGL fractionator and storage facilities; and invests in pipelines, an olefins production facility, and a refinery grade propylene splitter and pipelines in the Gulf Coast region. Williams Partners 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.