Company Northwest Pipeline LLC

Northwest Pipeline LLC owns and operates a natural gas pipeline system that ranges 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. The Company provides natural gas transportation services for markets in Washington, Oregon, Idaho, Wyoming, Nevada, Utah, Colorado, New Mexico, California and Arizona. Its principal business is the interstate transportation of natural gas, which is regulated by the Federal Energy Regulatory Commission (FERC). The Company system includes approximately 3,900 miles of mainline and lateral transmission pipeline and 41 transmission compressor stations. As of December 31, 2014, the Company has firm transportation contracts and storage redelivery agreements, with aggregate capacity reservations of approximately 3.9 million dekatherms of natural gas per day.