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Mississippi River Watershed with Major Tributaries and Major Ports


Map of  Mississippi River system showing major tributaries and major ports


The Mississippi River is the largest drainage basin in the United States and the second-longest river in North America. It is also the 15th largest river by discharge in the world. This schematic map of the Mississippi and its major tributaries shows the extent of this watershed. Major ports, as defined by the US Army Corps of Engineers (USACE) based on total tonnage, are also shown.