A concept design for a new inland containership - dubbed Waterborne Container Carriers (WCC) - was completed and released by DeJong & Lebet, a project that was completed for Venture Capitol Investors LLC, which owns a patent on the concept. Designed for operating on inland waterways, WCC measures 550 x 107 x 20 ft., with a length and beam specifically designed to fit in the Mississippi River System Locks. Air draft is limited to 42 ft. based on bridge height restrictions. The full load draft of the vessel varies from nine ft., unballasted, to 12 ft. ballasted. The ballast is also used to maintain draft when the container load is light. The vessel's propulsion system has raising and lowering capability for shallow draft upper river operations. The WCC is capable of carrying 566 40-ft.