Knife River Office

Founded in 1930, Concrete Materials is a family-owned and operated construction materials supplier that is headquartered in Sioux Falls, S.D. Its market areas range across the Midwest in Iowa, Nebraska, Minnesota and South Dakota. Concrete Materials services and supplies a wide variety of projects, from Department of Transportation multi-million dollar contracts to do-it-yourself weekend home improvements. Since the company s inception there has been continued growth and expansion. Concrete Materials now operates in Chancellor, Yankton and Sioux Falls where the company has a stone quarry. Concrete Materials prides itself in supplying quality products, such as aggregates, ready mixed concrete, hot and cold mix asphalt products and a variety of transportation solutions at competitive prices.

Knife River Midwest is a mining production company that serves customers throughout Iowa. The company offers a range of building materials, including concrete and asphalt. Knife River Midwest is a part of Knife River Corporation, which provides construction and maintenance services for airport facilities throughout the United States. Founded in 1917, the company offers a variety of construction materials, such as aggregate, cement and ready-mix concrete. It provides products for the construction of foundations, landscape retaining walls and paver systems. The company offers asphalt paving, engineering, site development and grading services. It also provides marine construction, petroleum recycling, concrete pumping and contaminated soil remediation services. Knife River Corporation manages a staff of more than 5,000 employees.

Gerhold Concrete Company, Inc. is based in Norfolk, Nebraska and is a supplier of ready mixed concrete, concrete block, segmental retaining wall, precast concrete, brick and other building materials throughout Nebraska and Iowa. Gerhold Concrete Company, Inc has been serving the construction industry in Nebraska since 1869. Started by a pioneer, reactivated and developed by his son, expanded by his grandsons, and revitalized by the Lyman-Richey Corporation, this Nebraska business celebrated its 140th birthday in 2009. Gerhold Concrete Company, Inc has long been recognized as a leader in the construction industry in Nebraska, Kansas, South Dakota, and more recently in Iowa.