Established in 1915, Knife River offers a range of construction-related materials. The company supplies a variety of products that include aggregates, asphaltic concrete and ready-mix concrete. It also offers a range of pre-stress concrete and light grading material. Additionally, the company provides paving and construction contracting services. It has a division that operates several asphalt plants. The company has manufacturing plants that produce concrete bridge decks and girders. It also manufactures hollow core panels and parking structures. The company has expertise in the area of manufacturing water tanks and building panels. It maintains over 1,000 pieces of rolling stock, trucks, vehicles and equipment. The company is headquartered at Tangent, Ore.