SG,
Big rains are doubly a good deal for you. Obviously it is nice to get your pond to full pool.
However, it also gives you a chance to track your leak better! Did you ever get a chance to set a water elevation staff and set up a game camera on time lapse? If not, then you can still collect some valuable information just based upon your actual visits to the pond.
I would definitely mark the date and water level when your pond quits passing water through the overflow. Then measure your water elevation on your next trip, especially if you have had zero rain.
Also, I would start checking the area behind the dam as soon as the ground is dry after the latest rains. If you THEN find a wet spot, you are starting to figure out your leak path.
Good luck finding and stopping your aggravating leak, and congratulations on reaching full pool!
