Flashboard Riser Also known as a weir box is a small overflow-type dam commonly used to control the water level in crop irrigation or ponds. Water flows over the top board or dam of the flashboard riser and is released at a level below the top of the weir. The crest of an overflow spillway on a large dam is often called a weir. Our flashboard risers are designed with today’s high production, low cost/low maintenance farming operations in mind. Quick and easy to install on existing culverts or new installations and quickly replaced if damaged. Our “no welding required” design forms a collar around the culvert and exerts a strong clamping force by its multiple take up points. This design also allows secure installations on “out of round” or odd size pipe. Each standard flashboard riser is painted safety red for high visibility or can be coated with our Wild Grasses duck pit paint for hunting use. Accessories available are our “Quick Gate”, “Beaver Guard” and cut to length boards . Our Quick Gate allows bottom drainage without removing the boards and our Beaver Guard protects the top board from beaver damage.