Robert L. Purdum

Bucyrus International, Inc. designed and manufactured mining equipment for surface and underground mining. Its surface equipment include walking draglines, electric shovels, and rotary blasthole drills and is used for mining coal, copper, iron ore, oil sands and other minerals, and underground equipment is used primarily for mining coal. The firm also manufactures OEM parts and provides support services for all Bucyrus brand mining machines. The company was founded in 1880 and was headquartered in Oak Creek, WI.

Sheffield Steel Corp. manufactures steel products. The company's products include hot rolled steel, concrete reinforcing bars, fabricated & epoxy-coated rebar, fence posts, railroad track spikes, and billets. It also offers rounds, flats, squares, and other shapes. Sheffield Steel is headquartered in Sand Springs, OK.