In this report, Northwest Pipeline LLC (Northwest) is at times referred to in the first person as "we," "us," or "our."
Northwest is indirectly owned by The Williams Companies, Inc. (Williams), a publicly traded Delaware corporation. Prior to August 10, 2018, we were indirectly owned by Williams Partners L.P. (WPZ), a Delaware limited partnership which was consolidated by Williams. On August 10, 2018, Williams acquired all of the outstanding common units of WPZ held by others, merged WPZ into Williams (WPZ Merger), and Williams continued as the surviving entity.
We own and operate a natural gas pipeline system that extends from the San Juan Basin in northwestern New Mexico and southwestern Colorado through the states of Colorado, Utah, Wyoming, Idaho, Oregon and Washington to a point on the Canadian border near Sumas, Washington. We provide natural gas transportation services for markets in Washington, Oregon, Idaho, Wyoming, Nevada, Utah, Colorado, New Mexico, California and Arizona, either directly or indirectly through interconnections with other pipelines. Our principal business is the interstate transportation of natural gas, which is regulated by the Federal Energy Regulatory Commission (FERC).