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  1. The Big Sioux River is a tributary of the Missouri River in eastern South Dakota and northwestern Iowa in the United States. It flows generally southwardly for 419 mi (674 km), [3] and its watershed is 9,006 sq mi (23,330 km 2 ). [1]

  2. The Big Sioux River is a tributary of the Missouri River in eastern South Dakota and northwestern Iowa in the United States. It flows generally southwardly for 419 mi (674 km), and its watershed is 9,006 sq mi (23,330 km2).

  3. The Big Sioux River is a tributary of the Missouri River in eastern South Dakota and northwestern Iowa in the United States. It flows generally southwardly for 419 mi, and its watershed is 9,006 sq mi.

  4. Apr 3, 2020 · Much of the Big Sioux’s watershed corresponds to the geological formation known as the Coteau des Prairies, a flatiron-shaped rolling plateau that rises from the flatlands of the James River valley on the west and the Minnesota River lowlands to the east.

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  5. The Big Sioux River is a tributary of the Missouri River, 419 miles (674 km) long, in eastern South Dakota and northwestern Iowa in the United States. The United States Board on Geographic Names settled on "Big Sioux River" as the stream's name in 1931.

  6. Dec 2, 2020 · The Big Sioux Falls are on the Big Sioux River. They are part of Falls Park near down town Sioux Falls, South Dakota.

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  8. Sioux Falls ( / ˌsuː ˈfɔːlz / SOO FALZ) is the most populous city in the U.S. state of South Dakota and the 121st-most populous city in the United States. It is the county seat of Minnehaha County [10] and also extends into northern Lincoln County to the south, which continues up to the Iowa state line. The population was 192,517 at the ...

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