Platte River. The Platte River is a major river in the State of Nebraska.
   It is about 310 mi long; measured to its farthest source via its tributary, the North Platte River, it flows for over 1,050 miles. The Platte River is a tributary of the Missouri River, which itself is a tributary of the Mississippi River which flows to the Gulf of Mexico.
   The Platte over most of its length is a broad, shallow, meandering stream with a sandy bottom and many islands, a braided stream. The Platte is one of the most significant tributary systems in the watershed of the Missouri, draining a large portion of the central Great Plains in Nebraska and the eastern Rocky Mountains in Colorado and Wyoming.
   The river valley played an important role in the westward expansion of the United States, providing the route for several major emigrant trails, including the Oregon, California, Mormon and Bozeman trails. The first Europeans to see the Platte were French explorers and fur trappers about 1714; they first called it the Nebraskier, a transliteration of the name given by the Otoe people, meaning flat water.
   This expression is very close to the French words rivi�re plate, the probable origin of the name Platte River. The Platte River is formed in western Nebraska east of the city of North Platte, Nebraska by the confluence of the North Platte and the South Platte Rivers, which both arise from snowmelt in the east
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