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| | Missouri (river) |
 | | Major river in central USA, largest tributary of the Mississippi, which it joins north of St Louis; length 3,969 km/2,466 mi; drainage area 1,370,000 sq km/529,000 sq mi. |
 | | The river is formed by the confluence of the Jefferson, Gallatin, and Madison rivers near Gallatin City, southwestern Montana, and flows southeast through the states of Montana, North Dakota, and South Dakota to Sioux City, Iowa. |
 | | The dams interfere with the natural seasonal flows of the river, and several species are threatened with extinction; the Missouri was on the US most-endangered river list 19932001. |
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