In 2013 I purchased a property with an existing 2 acre pond constructed in the '70s and fed by seasonal runoff. This pond has a leak, typically I find the water level about 3 feet below the drain pipe and I know of a soggy area in the ground below the dam. Now, I only periodically visit this property and fixing the leak hasn't been a priority as the dam is pretty thick and actually just part of a sloping hill. However, last month the pond was full to capacity (a very wet Tennessee season) and water was generously pouring into the top level pipe. This pond might become this full each year, but it was the first I've seen it become a lake. Should I be concerned about that soggy ground? Should I make this a priority? Should I hire an expert to assess my dam sooner than later? What will that cost?
One more bit of info: my house sits on the side of the hill below the pond.