The Mississippi - Missouri
The Mississippi can be ranked as the fourth longest river in the world by adding the length of the Missouri-Jefferson (Red Rock) system to the Mississippi downstream of the Missouri-Mississippi confluence—for a combined length of 3,710 miles (5,971 km)—the 2,340-mile length of the Mississippi proper is comfortably exceeded by 19 other rivers. In volume of discharge, however, the Mississippi’s rate of roughly 600,000 cubic feet (17,000 cubic metres) per second is the largest inNorth America and the eighth greatest in the world. Including the tributaries, the Mississippi drains all or part of 31 states and Canadian provinces.
