Thanks Brettski. I don't think working with the gubmint is in the cards for this one, but I recognize there are advantages. I don't think Cindy will have the patience to jump through all of the hoops though and it's her piece of the property.

Have you heard of anyone who designed two different levels of spillway?

I wish I knew more about fish behavior. Would there be an advantage to have a shallow area to flood for spawns or in certain weather, etc? Wish I had more time to research this too.