Pond Boss Forums POND CONSTRUCTION Building a dam Sizing the emergency spillway

have you considered slowing down the inflow by adding smaller retention/sediment style ponds at the top end? Maybe a causeway style wetland. As esshup mentioned you can get some crazy rain in a short amount of time in which your outflow can't keep up. Luckily my pond has a natural wetland at the top end to absorb some of those events