Abstract: A damming implement for depositing a series of earthen dams across a furrow to provide a line of catch or ponding basins which inhibit run-off of water includes a wheel structure having radially opposed blades oriented transversely to a line of draft for scraping a ground surface and with arcuate arms extending therefrom partly around the circumference of the wheel structure and having respective radially opposed end portions. The wheel structure is mounted in a yoke connected by a hitch to a tool bar pulled behind a tractor. A latch mounted on the yoke alternately engages a shock absorbing pad on one of the end portions of the wheel structure to prevent rotation thereof and scrape one of the blades along the ground surface for accumulating an earthen dam in front of the blade.