You're so right Toby. I have 6 acres and want to dig a 1/3 acre pond. Once I got to a guy and had his name, several phone calls later he said to go ahead and do it, even faxed me a letter to that effect. Said that if neighbors complained someone would come check, but the complaint would have to have some grounds such as runoff etc.
I realize this is a small ond compare to yours, but I have heard of fines and making you fill them in.