How did they know that you where working on your pond?
Back when I lived in CA, I had a friend with some land that was next to the Park. He and the Park people fought each other constantly. They accused him of something, they locked his gates, they blocked him from getting to his land and so on. He sued them, he won, he and his lawyer got paid. This went on year after year. In a good year, he would make $60,000 just suing the Park District. One year he found some receipts in their dumpster and was able to get a bunch of people fired for embezzling Park money. He loved it!!!
When he dug a pond on his place, he didn't get a permit, or tell them anything. He just brought in a dozer and had the guy clear the trees and dig the pond. The Park showed up the next week with helicopters and accused him of destroying wetland, endangered habitat and causing erosion to spawning areas ten miles away. He told them that the pond had always been there and that he was just cleaning it out. Since it had always been there, he was allowed to fix it. They had tons of pictures of his place, but none of them showed a pond with all the trees in the way. He won that one too!!!!