MDU Resources Group, Inc. is a diversified natural resource company. Montana-Dakota Utilities Co. (Montana-Dakota) is a public utility division of the Company. Montana-Dakota, through the electric and natural gas distribution segments, generates, transmits and distributes electricity and distributes natural gas in Montana, North Dakota, South Dakota and Wyoming. Cascade Natural Gas Corporation (Cascade), which is an indirect wholly owned subsidiary of MDU Energy Capital, distributes natural gas in Oregon and Washington. Intermountain Gas Company (Intermountain) distributes natural gas in Idaho. Great Plains Natural Gas Co. (Great Plains), which is a public utility division of the Company, distributes natural gas in western Minnesota and southeastern North Dakota. The Company�s segments include electric, pipeline and energy services, exploration and production, construction materials and contracting and construction services.