Take the plunge

Water quality best management practices, such as wet ponds, typically have forebays with culvert inputs. Incorporating correctly sized natural plunge pools can enable a more compact design for velocity attenuation. This allows a greater “stilling” effect for more efficient pollutant removal. Photos: Estes Design Inc.

Culvert outlets with submerged tailwater conditions typically exhibit a variation in designed pool geometry from their counterparts with free-falling jets or supported jets.

The natural plunge pool design methodology can also be used to transition steep grades by incorporating the methodology into step pool design.

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