Established in 1965, Radtke Contractors Inc. is a general as well as excavation contracting firm located in Winneconne, Wis. The company specializes in pile driving, marine and excavating contracting services, and undertakes a wide range of projects in commercial, municipal and residential construction markets. Radtke Contractors Inc. is a member of the Associated Builders and Contractors, Inc. and the Wisconsin Transportation Builders Association. Its project portfolio includes a variety of boat lift, dock, seawall, wharf, bridge, railroad and riprap projects.