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The Big Sioux River is a tributary of the Missouri River, 295 mi (470 km) long, in eastern South Dakota and northwestern Iowa in the United States.Columbia Gazetteer of North America entry The United States Board on Geographic Names settled on "Big Sioux River" as the stream's name in 1961.Geographic Names Information System entry for Big Sioux River
The Big Sioux River rises in Roberts County, South Dakota on the Coteau des Prairies and flows generally southwardly through Grant, Codington, Hamlin, Brookings, Moody, and Minnehaha Counties, past the communities of Watertown, Castlewood, Bruce, Flandreau, Egan, Trent, Dell Rapids, and Baltic to Sioux Falls, where it passes over a waterfall which gives that city its name. Downstream of Sioux Falls and the community of Brandon, the Big Sioux is used to define the boundary between South Dakota and Iowa, flowing along the eastern borders of Lincoln and Union Counties in South Dakota, and the western borders of Lyon, Sioux and Plymouth Counties in Iowa, past the communities of Canton, Fairview, Hudson, North Sioux City, and Dakota Dunes in South Dakota and Hawarden and Akron in Iowa. It joins the Missouri River from the north at Sioux City, Iowa.DeLorme (1998). Iowa Atlas & Gazetteer. Yarmouth, Maine: DeLorme. ISBN 0-89933-214-5DeLorme (2001). South Dakota Atlas & Gazetteer. Yarmouth, Maine: DeLorme. ISBN 0-89933-330-3
Tributaries
The Big Sioux River collects the Rock River from the northeast in Sioux County, Iowa. A minor headwaters tributary of the Big Sioux in Grant County, South Dakota, is known as the Indian River.Geographic Names Information System entry for Indian River
See also
References
Rivers of Iowa | Rivers of South Dakota | Tributaries of the Missouri River | Brookings County, South Dakota | Codington County, South Dakota | Grant County, South Dakota | Hamlin County, South Dakota | Lincoln County, South Dakota | Lyon County, Iowa | Minnehaha County, South Dakota | Moody County, South Dakota | Plymouth County, Iowa | Roberts County, South Dakota | Sioux City, Iowa | Sioux County, Iowa | Sioux Falls, South Dakota | Union County, South Dakota
"Big Sioux River"