Adjacent to the edge of the paved roadway there is a vertical curb on most residential streets. This curb defines the limits of the paved vehicular road surface, it helps to protect pedestrians from vehicular traffic, but it also is considered to be the bank of a watercourse. A curb cut or a core drill is a process by which we provide an opening in that bank (curb) to allow water to run out of this street (watercourse) into a water-harvesting basin in order to provide rainwater run off to plant materials.
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