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The first levees on the Mississippi River were built in 1726. By 1858, over 1,000 miles of levees stretched along the river. Some of these "river walls" were up to 38 feet high, as tall as a four-story building. Levees confined the river to a single channel, and blocked access to the floodplain where water would naturally spill over the riverbanks during relatively small flooding events. In April of 1926, the Army Corps of Engineers, the U.S. agency charged with controlling flooding of navigable rivers, declared that the levee system was a success and that the Mississippi River would not flood. |