Plunge pool height of fall, the volume of water, the resistance of the rock below the pool and other factors. The impacting and swirling water, sometimes carrying rocks within it, abrades the riverbed into a basin, which often features rough and irregular sides. Plunge pools can remain long after the waterfall has ceased flow or the stream has been diverted. Several examples of former plunge pools exist at Dry Falls in the Channeled Scablands of eastern Washington. Plunge pools are fluvial features of erosion which occur in the youthful stage of river development, characterized by steeper gradients and faster water flows. Where
Shoot the Chute board. The oldest ride of this type still in operation is the Boat Chute, constructed in 1926 and 1927 located at Lake Winnepesaukah Amusement Park in Chattanooga Tennessee. An operating modern reproduction of the Luna Park shoot the chute ride of the early 20th century, The Pittsburg Plunge, is currently in operation at Kennywood amusement park in Pennsylvania. The Shoot the Chute concept has evolved over time in the amusement park industry. All modern Shoot the Chute rides today feature a guide track after the descent down the chute into the pool of water that allows the boats to return