The 1993 flood was the most costly Mississippi flood in US history.
Here they are, beginning with the back row (right click on "open in new window" and enlarge for a better look): Second row down: Will Gookin, Alfred Nelson, Adda Callahan, Ida Yont, May Huntley, Lillie Woods, Burdette Rodgers, Elsie Courter, Della Arnold Anderson, Ira Wells, Nora Teas, Mary Briles, Wilma Nelson, Albert Kennedy, Lloyd Courier and Emory Parsons. Goltry, Vernie Bond, Roy Douglas, Mable Black, Harry Mc Neely, Lilly Fain, Rena Logan, Oscar Stone, Ida Patterson, Adda Clouse, Carrie Hamilton, Sadie Dale and Viola Staker.The Flood Control Act of 1928, "the largest public works appropriation ever authorized," grew directly out of the disaster.The 1973 flood was largest of the post-management era.It nearly took down major systems that control the flow of water in the lower river and helped shape our current notions of what a worst-case scenario might look like.Scientists studying the disaster also found that much of the nastiness of the '73 episode could be attributed to the changes humans had made to the river.Think of the process that created the Grand Canyon, but at far smaller scales.The banks hold the river under most conditions, but when somewhere upstream more water gets added to the system, the river can overflow its banks, submerging the land around it. Like all other rivers, pretty much, the Mississippi floods.According to the topology of a place, natural channels for the water develop. Rivers are connected together in vast networks of tributaries, which feed water into the main river channel, and distributaries, which pull water out of the main channel.As the rivers flow, they scour the channel in which they are flowing, creating "banks" to the river.The earlier episode devastated the valley and set many of the processes in motion that created the current river management system.26,000 square miles were inundated and 600,000 people displaced.