Wunderground.com- 4/23/13, Dr. Jeff Masters

Figure 1. Thursday, April 18, 2013: Aerial photo provided by the U.S. Coast Guard shows the dam in Marseilles, Ill., after seven barges broke free from a tow and came to rest against the dam. (AP Photo/Courtesy of the U.S. Coast Guard, Petty Officer 3rd Class John Schleicher.)