Knife River Holding Co formerly Knife River Corp provides construction materials and contracting services throughout the western, central, and southern United States. Knife River produces and delivers aggregates and markets crushed stone, sand, gravel, and related construction materials, including ready-mix concrete, asphalt, and other value-added products. It also distributes cement and asphalt oil. It has more than 1 billion tons of aggregate reserves, 110 ready-mix plants, 50 asphalt plants, and a combined 410,000 tons of liquid asphalt and cement storage. The company also performs integrated contracting services for most types of aggregate-related construction, including roads, freeways, bridges, residential properties, schools, shopping centers, office buildings, and industrial parks.