For ten years, Vacationer and Neighbor have owned summer vacation homes on adjoining lots. A stream flows through both lots. As a result of a childhood swimming accident, Vacationer is afraid of water and has never gone close to the stream. Neighbor built a dam on her property that has completely stopped the flow of the stream to Vacationer's property. In a suit by Vacationer against Neighbor, will Vacationer prevail? 
Yes, if the damming unreasonably interferes with the use and enjoyment of Vacationer's property.  Yes, if Neighbor intended to affect Vacationer's property.  No, because Vacationer made no use of the stream.  No, if the dam was built in conformity with all applicable laws. 