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
Plunge dip Plunge dip A plunge dip (or simply, a dip) is a bath designed to immerse livestock in liquid pesticide or other treatment. Typically a dip is designed as a narrow channel (about the width of the animal) through which the animals walks along through into progressively deeper liquid until the animal is immersed (apart from its head so it can breathe) and then becomes progressively shallower until the animal exits the channel. As many animals can be walking through the channel one after another, it is an efficient method of delivering pesticide or other liquid treatments to a large herd.