Modular Plastic Docks
Connectable Floating Dock Pieces
Modular Plastic Docks pieces are Great Northern Docks’ foray into the world of budget-conscious plastic floating dock segments. Our plastic dock offers rugged capability, intuitive configurability, and a primary focus on the install process, especially for DIYers.

Basic MPD Shapes

18-inch Tall MPD
Building Block Size Solutions for Big Boats
10-inch Tall MPD
Building Block Size solutions for swim platforms and Small Boats
Modular Plastic Docks (MPDs) deliver the latest in plastic molding technology and American ingenuity to meet an ever-increasing demand for affordable, low maintenance, and stable floating docks. MPDs use a rotational molding technique to make hand portable sized “building blocks” that lock together on the water. They are incredibly sturdy, yet each block is light enough for parcel shipping to your door. Most assemblies can be done with basic hand tools and are easily rearranged as your configuration needs change. Available in two standard heights, the MPD-10 inch that is ideal for swim platforms and small boats such as kayaks and shells, while the MPD-18”, is popular for larger vessels. Contact us to begin planning your MPD today.
Why Choose MPDs?
With the variety of products on the market you may wonder why choose MPD?
There are many key benefits that make MPD the superior choice:
- 20-year manufacturer warranty
- Easy speedy & stable
- Rotational molding makes MPD much firmer to walk on than blow-molded docks.
- Minimal maintenance
- 18″ tall over 80lbs, 10″ tall over 40lbs per square foot of buoyancy
- Lighter weight than most competitive products
- Hull Friendly
- Freeboard of either 8” or 16”
- Low draft reduces drag in currents.
- Easy to reconfigure.
- Minimum outer wall thickness of ¼”; the thickest in the industry.
- MPD’s can be attached to Dura-LITE Aluminum Rigid Ramps