Abstract: A siphon apparatus for hindering beavers from blocking the inlet of a flood control riser in a water reservoir. The siphon apparatus includes a first conduit for being positioned within the riser, the first conduit having a lower end and an upper end; a second conduit for being positioned outside the riser, the second conduit having a lower end and an upper end, the lower end of the second conduit being at a higher vertical plane than the lower end of the first conduit; and a third conduit for joining the upper ends of the first and second conduit and for allowing water to be siphoned from the lower end of the second conduit to the lower end of the first conduit.