Plunge pool softer or fractured rock has been eroded back to a knickpoint, water continues to bombard its base. Because this rock is often less resistant than overlying strata, the water from the higher elevation continues eroding downward until an equilibrium is achieved. A somewhat similar bowl-shaped feature developed by flowing water, as opposed to falling water, is known as a scour hole. These occur both naturally and as a result of bridge building. Plunge pool A plunge pool (or plunge basin or waterfall lake) is a deep depression in a stream bed at the base of a waterfall or shut-in. It
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