I purchased some farmland in Minnesota earlier this year. There are 2 ponds, one borders my southern neighbor and one is in the center of my property. There is a man made ditch connecting the two. The ponds are approximately 1/8 of a mile apart. The previous landowner had a dispute with the southern neighbor several years ago regarding a block that was put into the ditch to prevent water from running to the pond in the center of the property. In high water years the first pond overflows into the ditch flooding the second pond and resulting in several acres of farmland being lost. The previous landowner prevailed and was allowed to keep the ditch block in by the watershed board. The southern neighbor drove a trackhoe onto my property sometime in the last week and removed the ditchblock, as well as lowering the ditch itself. He did this without my permission. A permit was required to put the ditchblock in originally. Can I put the ditchblock back in, or do I need to clear it with the watershed district. Also, what recourse do I have with the neighbor? Can I sue for damages (cost of labor/material) to replace the ditchblock? Does the watershed boards ruling in 2006 still have merit even though the land has been sold?