Wing ditches should be spaced to permit the roadbed to dry and reduce the volume and velocity of side ditch water. Runoff water should be spread, retained, or filtered at the outlet of the wing ditch. Wing ditches should not feed directly into adjacent drainage, gullies or channels. Wing ditches into brush. Wing ditches into a well designed earthen dam.
Wing ditches into a flat spreader that distributes water on the undisturbed forest floor.