Sorry for the delayed reply (trying to get that tyvek covered up)

Yes the spring allows for a constant run off out the overflow, but I assume it will change at times in the summer dry months.

I've added 2K minnows to the pond and plan to stock 12 Rainbows this Saturday. I have a 15 month old son that will get a huge kick out of the fish! The local MD/"Fish Whisperer", who runs hatchery as a hobby, suggested I start with a few fish to try and keep things in check. In May I'll add 40 Perch and 40 Bass to keep things moving. By next yr I hope to support some Triploid Grass Carp.

Our main focus for the pond is recreation. We would like me able to swim and relax in the pond as it sits feet from the house we're building. Fishing is an added bonus but we're more interested in floating on a tube with an ice cold beer (well at least I am).

My biggest worry is the pond getting full of algae, making it undesirable for my wife and friends to enjoy.