Williams Partners is engaged in owning, operating, developing and acquiring natural gas, natural gas liquids (NGLs) and oil gathering systems and other midstream energy assets. Co. is principally focused on natural gas and NGL gathering that connects natural gas and NGLs produced at the wellhead to third-party takeaway pipelines. Co. operates assets in the Barnett Shale region in north-central Texas, the Eagle Ford Shale region in South Texas, the Haynesville Shale region in northwest Louisiana, the Marcellus Shale region primarily in Pennsylvania and West Virginia, the Niobrara Shale region in eastern Wyoming, the Utica Shale region in eastern Ohio, and the Mid-Continent region.