Plunge pool 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 is created by the erosional forces of cascading water on the rocks at formation's base where the water impacts. The term may refer to the water occupying the depression, or the depression itself. Plunge pools are formed by the natural force of falling water, such as at a waterfall or cascade; they also result from man-made structures such as some spillway designs. Plunge pools are often very deep, generally related to the
Chute (racecourse) (grass) course inside of the main (dirt) track, most commonly measuring . This turf course will often be equipped with a chute of its own, extending diagonally from the stretch, to permit turf races to be run at the distance of . This diagonal chute can either consist of a more-or-less straight line, or may curve significantly, in a counterclockwise direction. In 2006 two tracks — Monmouth Park and Hollywood Park Racetrack — added a chute extending diagonally from the backstretch, to permit races at furlongs and 6 furlongs, respectively (the corresponding circumferences of these two tracks' turf courses being