In rural areas of Flower Mound, roadway drainage is accomplished through the use of swales, ditches, and culverts. Drainage and Right-of-Way maintains the swales and ditches by re-grading and re-defining the flow line of the swales to provide for positive grade, which allows the system to maintain its intended flow capacity. One of the most common challenges in maintaining surface drainage through swales and ditches is the lack of a positive grade, due to the original topography of the area and/or the development of the area prior to the town’s current standards. For more information on swale or ditch re-grading, please contact 972.874.6400.