Big Sioux

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Big Sioux

(so͞o), river, 420 mi (676 km) long, rising in NE S.Dak. and flowing S into the Missouri River. It passes through an agricultural region that produces corn, oats, hogs, and beef cattle. The river's meandering course drops 20 ft (6 m) and services a hydroelectric station there. The Big Sioux forms part of the border between Iowa and South Dakota.
References in periodicals archive ?
Blood Run National Historic Landmark, located in southeastern South Dakota and northwestern Iowa along the Big Sioux River and Blood Run Creek, is featured in the documentary--as the Ioway were among several other tribes, including the Omaha, Oto, and Yankton Sioux, that once occupied the site.
Crews are searching for the bodies of a man and a woman who were presumed drowned when they tried to rescue 6-year-old Garrett Wallace when he fell into the icy Big Sioux River in South Dakota.