Yes, the pond will be overtopped. It does that about twice a year and I have to put the driveway back. Without the pond I'd be working the driveway a lot more. I plan to add a few more feet of freeboard to help reduce the overtopping, but my gut tells me it will only reduce the amount of time that it is actully flowing over the top. As sfor diverting watershed... I could have a lake built above it but that's not going to happen. There goes my mushroom patch!
