A drainage swale is a way to channel small to large amounts water. They are usually dug down to hardpan, clay, or a have a concrete pad at the bottom for erosion control. We lay a filter fabric down and install rock on top to prevent erosion from the banks. We have in certain cases concreted the rock/boulders in place to slow the flow of water. In Tulsa, Jenks, Bixby, Broken Arrow, Sand Springs, Owasso, Tulsa OK and surrounding areas.