Thanks Sam74 and Froude...Sam74, there currently is no outlet structure on the pond..Past design just indicated the pond had enough available storage above it's normal pool elevation to hold the design storms without overtopping...So the predevelopment flow from the pond was always zero...
Have an exisiting pond close to a stream. Currently the pond and stream are not hydraulicly connected. Only in the 100-Year flood event, when stream floods over pond. We want to bring an intake pipe into the pond from the stream and then install a riser in the pond and outflow back into the same...