| Northwest Natural Gas Company, doing business as NW Natural, is principally engaged in the distribution of natural gas in Oregon and southwest Washington. The Company's has three business segments: local gas distribution, gas storage and other. Local gas distribution also referred to as the utility, which involves purchasing gas from producers, transporting the gas over interstate pipelines from the supply basins to its service territory, and reselling the gas to customers at rates and terms approved by the Oregon Public Utility Commission (OPUC) or by the Washington Utilities and Transportation Commission (WUTC). The gas storage business segment includes NW Natural's underground natural gas storage services to interstate and intrastate customers using NW Natural's storage and related transportation capacity that is in excess of core utility customer requirements. |