Levee – is it dry? Is it going to break? Perhaps you’ve heard them mentioned in 1970s songs or on the news. We’ve heard the term, but what is a levee? Where are they? What do they do? Well – a levee is a human-made barrier designed to reduce the frequency of flooding to a portion of a floodplain. In fact, there are more than 6,811 total levee systems covering 24,000 miles throughout the United States with a property value of $2 trillion 23 million people behind them. The National Levee Database has all this information – and more!