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
Chute (racecourse) The chute was modeled to give the appearance of a European-type course. Grass sprints at about 6 furlongs (actual distance 64 feet less than same), as well as the marathon distance of about 1 miles (actual distance 262 feet less than same, and generally used only once a year for the San Juan Capistrano Invitational race), utilize the full length of the El Camino Real Chute. Turf races at 1 miles and 1 miles also start from various points within the chute, and races at 1 miles (a very common turf distance at American tracks) start directly on the dirt