Martin,
I know what you mean. They have ways of....., LOL. I have found the main problem is getting anybody to sign off. Nobody wants their name at the bottom of the permit. From what I have been told now that the permit has been issued it will be easier to get the next one, right.
I was given some good advise at one point. Ask them for something totally rediculous then settle for what you want. Never ask for what you want. Let them tell you what you need, with a little coaxing of course.
People have been putting sand in this lake for many years, it's when a neighbor complains that it becomes an issue, otherwise they are just to understaffed to keep up with ordinary work.
Good luck with your project and keep us posted.