Founded in 1897, Lehigh Cement Company is a privately owned firm that manufactures cement and construction materials. The company has cement plants in York, Pa.; Redding, Calif.; Mitchell, Ind.; and Mason City, Iowa. It has more than 5,500 employees. Lehigh Cement Company manufactures various types of cement, including gray, white, custom-colored and blended cement. The various types of construction materials offered by the company include ready mix concrete, aggregates, prestressed concrete units, and concrete blocks and pipes. Additionally, the company has a technical service group that provides assistance to formulate proper mix designs and offers support services for construction needs of its clients. Lehigh Cement Company is located in Union Bridge, Md.