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MDU Resources Group, Inc. operates as a diversified natural resources company, which provides energy, natural resources products, and related services in the United States. The company, through its subsidiaries, primarily operates in seven segments: Electric, Natural Gas Distribution, Utility Services, Pipeline and Energy Services, Natural Gas and Oil Production, Construction Materials and Mining, and Independent Power Production. The Electric segment generates, transmits, and distributes electricity in Montana, North Dakota, South Dakota, and Wyoming. The Natural Gas Distribution segment distributes natural gas in western Minnesota and southeastern North Dakota. The Utility Services segment engages in electrical line construction, pipeline construction, inside electrical wiring and cabling, and the manufacture and distribution of specialty equipments for utilities and manufacturing, commercial, government, and institutional customers. The Pipeline and Energy Services segment provides natural gas transportation, underground storage, and gathering services through regulated and nonregulated pipeline systems primarily in the Rocky Mountain and northern Great Plains regions of the United States. It also provides energy-related management services, including cable and pipeline magnetization and location. The Natural Gas and Oil Production segment engages in the acquisition, exploration, development, and production of natural gas and oil primarily in the Rocky Mountain region of the United States and in and around the Gulf of Mexico. The Construction Materials and Mining segment mines aggregates and markets crushed stone, sand, gravel, and related construction materials, including ready-mixed concrete, cement, asphalt, and other products. It also performs integrated construction services in the central and western United States and in the states of Alaska and Hawaii. The Independent Power Production segment owns, builds, and operates electric generating facilities in the United States and has investments in domestic and international natural resource-based projects. MDU Resources was incorporated in 1924 and is based in Bismarck, North Dakota.
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