Its a low area and I think at one point many many many moons ago it was a small pond for sheep to drink out of. the seep looks it has a man made dam on the one side and is just shy of the surrounding ground on the other. Wish I had a picture to post.
I have something very similar. I think it was hand dug many years ago to water sheep or cattle. They found a spot that was always wet and dug it out, banking dirt on the low side. The dirt bank has trees growing on it that are 50-60 years old, so I knew it had been there and always wet for a long time.
It was a small water hole, maybe 30' across and had mostly filled with branches and leaves over the years. I don't think it has a spring feeding it, but ground water is constantly seeping into it, enough to make a trickle of out flow.
I routed the drainage along my driveway into it and had it dug out to 13' deep in the center by an excavator, and enlarged it a bit to maybe 50' across. The slope of the ground and DNR rules prevented making it a lot bigger. Any who, it is always full and usually has some overflow, even when my rain-filled pond is losing water.
Since it sits in a "wooded wetland", without a lot of permit hassles the size is limited to 1/10 acre and no more than 1/4 acre disturbance. Since it already existed, it was grandfathered in that I can maintain it. So I did. :laughing:
If you have the right spot, even with just ground water supplying the pond, and don't ask for too much water by making it too big, you should do okay.
