Grass Swale

Image Credit: Keltic Engineering, Inc.

A grass swale is a long, narrow grassy channel used to carry stormwater to a downstream green infrastructure practice or storm drain. Grass is typically kept to a height of about three to six inches to slow down the runoff and allow any debris or sediment to settle out without interfering with the direction of flow. Grass swales can be used to make your streetscapes greener and to save your project money on traditional piping. 

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