Frontier-Kemper Constructors is widely recognized as one of the leaders in the heavy civil and underground mining construction industries. With more than $2 billion in projects successfully completed throughout the Americas, the company has built a reputation for expertise in the engineering and construction of deep shaft and tunnel projects of all sizes and complexity. Frontier-Kemper Constructors provides clients a wide range of construction services and related manufactured products. The firm builds tunnels for highways, railroads, subways and rapid transit systems. It also constructs tunnels, shafts and other facilities for water supply and wastewater transport and treatment. Frontier-Kemper Constructors develops and equips underground mines for coal, salt, copper and other minerals. Since its inception, the company has completed more than 240 construction contracts. It is headquartered in Evansville, Ind.