Thanks..
Pond is approx 1 1/2 Acres
Depth maybe 10'??? I need to get out there and check. A large amount of it is 4-5' deep.
Age = 7-10 years.
Pond had lost a lot of water in February before we purchased it due to a PVC fitting coming off the overflow that basically opened up a 6" pipe 5' below the surface. The pond refilled quickly after the fitting was reattached. I don't think that had much to do with the issue based on looking at Google Earth images from June of 2011...