MDU Resources Group, Inc. is a diversified natural resource company. The Company’s segments include Electric, Natural Gas Distribution, Pipeline and Midstream, Construction Materials and Contracting, Construction Services and Refining. 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. The Company, through Cascade Natural Gas Corporation (Cascade) distributes natural gas in Oregon and Washington. The Company, through Intermountain Gas Company (Intermountain) distributes natural gas in Idaho. Great Plains Natural Gas Co. (Great Plains) is a public utility division of the Company. Great Plains distributes natural gas in western Minnesota and southeastern North Dakota.