Not that I know if it is sinking actually. But lets take a trip down memory lane. The Beast use to have a lake that sat around the form of the track. Kings Island at the time did there best to fill in the lake and drain most of the water because it was hard for the ride mechanics to get to certain area's for repair. (Makes sense so far right) The Vortex built so many odd years later and actually does sit a little lower than The Beast platform. Dont ask how I know because I do not want to be so obvious but most of that old lake has leaked under parts of The Vortex. The word sink (To descend to the bottom; submerge.) may not be the right word. Lets just say this, water forms in areas that will support it and holds up in areas that will not drain. Under The Vortex is one of those areas, and it may not sink but the structure will get REAL weak at some point and will cause abnormal things to occur on this ride over time. I'd give it........................ 8 years