Meeco Sullivan Brings Over 110 Years of Freshwater and Saltwater Experience to Your Marina or Floating Dock Project. In 1961 Sullivan Flotation Systems was founded by John Sullivan to build an affordable and practical floating alternative to traditional fixed/stationary docks. Over time, Sullivan Flotation Systems continued its tradition of product excellence and grew to be one of the oldest and largest manufacturers of floating dock and marina systems. In 1960 Meeco Marinas was founded in Oklahoma as a marina and dock manufacturer primarily serving the Midwest. Meeco Sullivan is where the experience and expertise of these entities now reside under one management team of seasoned industry professionals.