For farming here in Minnesota, the FSA office, the DNR, and a state overseer all get very involved in wetlands issues.
They take it very seriously.
All three agencies do not talk between each other, you need to take your paperwork from one to the other, and get approval from all 3.
I wish I could live under your rules.
There are many efforts afoot to make what I have to deal with a national program, adding another agency that would need to approve everything.
Frankly, of you are allowed to drain or build up something, do so if you can.
That will end soon.