We built a pond last July by damning up a holler, rivine, spring, etc. It is about half full and it will be just over an acre when full.This year I have noticed that there is a little stream flowing out the backside of the damn. We put in a key way and built our damn out of clay. Should I be concerned, if so , can I fix it.

u need to restate your ? a little more clearly

When my pond was first built, it filled up about halfway just from a spring. It filled up completely with one good rain, and it also leaked around the dam. It did this until the dam settled and packed, it did it for about a year.

In my area, it's tough to maintain small ponds , especially when built on creeks, ravines, or gulleys, when we get some heavy gulley washing rainstorms...

Your keyway, or overflow, might help, but I've seen lots of ponds washed out in flash floods...

You might want to enlist professional advice...Good luck...

concrete it in all honesty though, there are air pockets in the dam until it settles.

ya they used concrete in ours and that black neeting on hte bottom