Welcome Josh. I have a couple of thoughts.

Take a look at siphons. They do a good job of maintaining heavy overflow when you have that much drainage area. But, you still need an emergency overflow.

Regarding springs, they are great. I wish I had one. However, you have to be careful where they are in relation to the body of water. They have to be outside the pond/tank/pool/impoundment. If you hit one while dozing, you can create a problem for the pond. A spring is nothing but a pressurized, flowing, aquifer. If you have one that is below the water level of the pond, it can/will suck water if the level of ground water drops in periods of drought.

It's not about the fish. It's about the pond. Take care of the pond and the fish will be fine. PB subscriber since before it was in color.

Without a sense of urgency, Nothing ever gets done.

Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley Rancher and Farmer Muleshoe Texas 1892-1985 RIP Grandpa