A little history

This is one of the crevasses that opened up in the Mississippi levee system in 1927. We,as a nation, then created a vast levee system that has protected much to the country since that time. It's purpose, however, was not protection of people and property, but protection of navigation. Those levees worked fine in New Orleans during Katrina, it was the levees built to protect people and property, not navigation, that failed.