MDU Resources Group Inc

MDU Resources Group Inc. engages in the regulated energy delivery and construction materials and services businesses in the United States. It operates through five segments: Electric Natural Gas Distribution Pipeline Construction Materials and Contracting and Construction Services. The Electric segment generates transmits and distributes electricity for residential commercial industrial and municipal customers in Montana North Dakota South Dakota and Wyoming; and operates 3400 miles of transmission lines 4800 miles of distribution lines and 84 transmission and 294 distribution substations. The Natural Gas Distribution segment distributes natural gas for residential commercial and industrial customers in Idaho Minnesota Montana North Dakota Oregon South Dakota Washington and Wyoming; and offers related value-added services. The Pipeline segment provides natural gas transportation and underground storage services through a regulated pipeline system primarily in the Rocky Mountain and northern Great Plains regions; and cathodic protection and other energy-related services. The Construction Materials and Contracting segment mines processes and sells construction aggregates; produces and sells asphalt; supplies ready-mixed concrete; and sells cement finished concrete products merchandise and other building materials and related contracting services. The Construction Services segment constructs and maintains electrical and communication wiring and infrastructure fire suppression systems mechanical piping and services; overhead and underground electrical gas and communication infrastructure construction and maintenance services; and manufactures and distributes transmission lines construction equipment and tools. It serves manufacturing commercial industrial transportation institutional and renewable and government customers as well as utilities. The company was founded in 1924 and is headquartered in Bismarck North Dakota.