Regency Energy Partners LP gathers and processes, compress, treats and transports natural gas; transports, fractionates and stores natural gas liquids (NGLs); gathers, transports and terminals oil received from producers; gathers and disposes salt water, and manages coal and natural resource properties in the United States. The Company has six business segments: Gathering and Processing, Natural Gas Transportation, NGL Services, Contract Services, Natural Resources and Corporate. The Gathering and Processing segment provides wellhead-to-market services to producers of natural gas. The Natural Gas Transportation segment owns a 49.99% general partner interest in RIGS Haynesville Partnership Co. The NGL Services segment owns a 30% membership interest in Lone Star NGL LLC. The Contract Services segment owns and operates a fleet of compressors. The Natural Resources segment manages coal and natural resources properties. The Corporate segment includes its corporate assets.