Knife River Corporation, along with its subsidiaries, supplies aggregates-based construction materials and contracting services in the United States. It operates through the West, Mountain, Central, and Energy Services segments. The company mines, processes, and sells construction aggregates such as crushed stone, sand, and gravel, and produces and sells asphalt and ready-mix concrete. It also offers contracting services including heavy-civil construction, asphalt and concrete paving, and site development and grading, and sells cement, merchandise, and other building materials and related services. In addition, it produces and supplies liquid asphalt for asphalt road construction. Its construction materials are sold to public and private-sector customers, including federal, state, and municipal governments and industrial, commercial, and residential developers, while its contracting services serve public-sector customers for highways, local roads, bridges, and other public-infrastructure projects. Founded in 1917, Knife River Corporation is headquartered in Bismarck, North Dakota.