MDU Resources Group, Inc. engages in regulated energy delivery, and construction materials and services businesses in the United States. It operates through five segments: Electric, Natural Gas Distribution, Pipeline and Midstream, Construction Materials and Contracting, and Construction Services. The Electric segment generates, transmits, and distributes electricity in Montana, North Dakota, South Dakota, and Wyoming. As of December 31, 2018, it served 143,022 residential, commercial, industrial, and municipal customers in 184 communities and adjacent rural areas. The Natural Gas Distribution segment distributes natural gas in Montana, North Dakota, South Dakota, and Wyoming, as well as Idaho, Minnesota, Oregon, and Washington; and offers related value-added services. It serves 957,727 residential, commercial, and industrial customers in 339 communities and adjacent rural areas. The Pipeline and Midstream segment provides natural gas transportation, underground storage, and gathering services primarily in the Rocky Mountain and northern Great Plains regions. It also offers cathodic protection and other energy-related services. The Construction Materials and Contracting segment mines, processes, and sells construction aggregates; produces and sells asphalt mix; and supplies ready-mixed concrete and cement in the central, southern, and western United States, as well as Alaska and Hawaii. The Construction Services segment designs, constructs, and maintains overhead and underground electrical distribution and transmission lines, substations, external lighting, traffic signalization, and gas pipelines; electrical and communication wiring and infrastructure, and fire suppression systems; and renewable energy projects. It also offers utility excavation, and mechanical piping and services; and manufactures and distributes transmission line construction equipment and other supplies. The company was founded in 1924 and is headquartered in Bismarck, North Dakota.
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