McLanahan Corporation is ranked by Family Business Magazine in the top 50 oldest family-owned companies in the United States, and listed by Modern Casting Magazine as the oldest family-owned foundry in the United States. The company, which was founded in 1835, is provider of process equipment for the dairy, agricultural and refinery industries. McLanahan Corporation offers a wide range of aggregate processing equipment for washing, classifying, crushing and screening construction aggregates, such as limestone, granite, sand, gravel and other similar minerals. The company also provides mineral processing equipment that is designed to crush various materials. McLanahan manufactures and sells vibrating, tumbling and rotary screening equipment, as well. The company is located in Hollidaysburg, Pa.