11. Every person digging a drainage ditch for silvicultural purposes shall construct a settling pond at least 20 m from the watercourse into which the ditch flows and shall drain that pond where the height of the water above sediments is less than 30 cm over at least 50% of the pond area.
Notwithstanding the foregoing, no person may dig a drainage ditch for silvicultural purposes in a waterfowl gathering area or in a muskrat habitat.