Channel up to the upper dammed, bank softened, trees overturned.

Our neighbor owns a mill. It has not been in operation for a century. He wants to sell the mill. In order to make the mill as attractive as possible, he has the channel leading to the mill up to the top edge dammed.

As a result, the soil of the adjoining land was softened. The roots of the trees lost their hold in the earth. In a violent storm, these trees were overturned. These are my old beeches that have been uprooted.

What should I do?