We launched the marine division in the late 1970's when our original dock was designed, built, and installed by a second generation family member, Thomas Radtke. Since then our docks, seawalls, wharves, boat lifts and other marine structures have always been manufactured in house and installed by our own crews. 


Marine structures elevate curb appeal and efficiencies. They also can significantly increase the value of your home or property. Our skilled contractors have built a long-lasting reputation for quality construction and innovation. This approach eliminates the middle man and allows for a smooth process for customization upon client request.

Our equipment is well-maintained and can handle any marine building project. We know that not only does it take experience to get the job done, but also reliable and efficient equipment.  We’ve recently added to our marine equipment base, providing an even greater amount of strength and force to complete your unique shoreline project. Some of our marine equipment base includes:

Tug Boats

Two large, powerful tugboats with pilot houses for pushing barges and other marine equipment

Spud & Crane Barges 

Large, flat-bottomed boats used to transport heavy machinery required for marine construction


Used after equipment is on site to install your new shoreline system


Down Hole Rock Hammers & Drills

Used to drill holes into stone and are capable of providing permanent piling foundations

At Radtke Contractors, we've consulted and worked within a wide variety of industries. The following list includes some of our clients we've been proud to serve and will continue to provide exemplary service in the future:  

Department of Natural Resources (DNR)

Department of Transportation (DOT)

Federal Emergency Management Agency (FEMA)

U.S. Army Corps of Engineers

The Waters Marina & Sailing School (Oshkosh, WI)

Fratello’s Dock & Wharf system (Oshkosh, WI)

Downtown Dam Restoration (Green Lake, WI)

Historic Rush Lake Restoration (DNR)

Wharf & Dock system (Winneconne, WI)

Oshkosh Parks & Recreation Department

Various Public Boat Landings

Various Conservation Clubs

For additional information, questions or a consultation, contact us today!

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