If you were following the news earlier this month you are aware of the situation at Oroville Dam in California, the tallest dam in the United States. Rising water in the dam prompted the evacuation of 188,000 people and had the attention of the entire nation and much of the world. Operators of the dam were forced to use an overflow spillway and then the emergency spillway to bring water levels down and prevent water from flowing over the main dam. Erosion damage took place as a result of using both spillways and there was much concern about a catastrophic failure of the dam. It was truly a crisis.