Knife River Corporation is one of the leading aggregate producers in the United States. The company offers an array of products under various categories, including aggregate, asphalt ready-mix concrete, building materials, construction services and liquid asphalt production. In addition, Knife River Corporation provides various services, such as aggregate placement, asphalt paving, engineering, site development and grading, concrete pumping, emulsion distribution and laydown, petroleum recycling, resort or golf course construction, airport construction and maintenance and many more.