Overflow: Gallery

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  Flat metal overflow with stone surround to reduce erosion around the cast concrete structure. Mississauga Road, ON

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  Domed, metal overflow grate. Being flush with the surface reduces potential infiltration of ponded water. Photo credit: Aaron Volkening

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  Overflow inlet for newly constructed stormwater bioretention areas in median of Bradley Road. Village of Brown Deer, Wisconsin. Bradley Road, east of 51st Street. Photo from October 2015. Constructed summer 2015.
  Photo credit: Aaron Volkening

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  Flat, metal overflow grate in Emeryville California Stormwater Curb Extension

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  Note the greyish colour change indicating UV degradation of this plastic overflow inlet in a bioretention cell; metal is recommended instead. Mississauga ON.

A shallow excavated surface depression containing prepared filter media, mulch, and planted with selected vegetation.