It was a hidden gem behind all that brush! I will do some more research on the bottom withdrawal spillway as I also think that will be the best option for this pond since it is around so many trees/organic matter.

As far as the steady flow of water, to clarify, it is more just a lot of runoff during the rainy season so I imagine after closing up the spillway the pond should fill up quick with a wet summer (hopefully). There is also a spot on the other side of the dam that originally seemed to be an emergency spillway so I should be able to incorporate that as well. Thank you for the feedback and I will update with progress and if I have any other questions. Much appreciated.