brian, tell us some more background. When you say that the man has "been informed that I built a pond," what do you mean? Did a neighbor drop a dime?
If they have some agenda behind their interest in your pond, I would suggest finding out exactly what the agenda is, in detail. They may not be the best source to find out.
If I had been contacted by any gov't agency with regard to my pond, and if I viewed that contact to be in any way negative, I would immediately be on the phone with my state and US Senators and Congressmen.
