Knife River Corporation, together with its subsidiaries, provides aggregates-led construction materials and contracting services in the United States. It operates through Pacific, Northwest, Mountain, Central, and Energy Services segments. The company mines, processes, and sells construction aggregates, including crushed stone and sand, and gravel; and produces and sells asphalt and ready-mix concrete. It also provides contracting service, such as heavy-civil construction, asphalt and concrete paving, and site development and grading. In addition, the company sells cement, merchandise, and other building materials and related services; and produces and supplies liquid asphalt for use in asphalt road construction. The company sells its construction materials to public and private-sector customers comprising federal, state, and municipal governments; industrial, commercial, and residential developers, as well as other private parties; and provides its contracting services to public-sector customers for the development and servicing of highways, local roads, bridges, and other public-infrastructure projects. Knife River Corporation was founded in 1917 and is headquartered in Bismarck, North Dakota.