Lynn Moses will be locked up in federal prison next Wednesday. His crime? Protecting the city of Driggs, Idaho from flooding. When Mr. Moses began to develop a subdivision along Teton Creek in 1980, Teton County required him to implement an engineer’s plan to modify the Teton Creek stream bed to prevent the flooding of subdivision property, caused by the buildup of gravel bars and downed trees, during high water flows in the spring. In fact, the county would not allow him even to record the plat for the subdivision until the modification work had been done, and only allowed...