Brule (BROOL), county (846 sq mi/2,191 sq km; 1990 pop. 5,485), S central S.Dak.; Chamberlain. Agr. area bounded W by Missouri R. (L. Francis Case reservoir). Drained by Smith Creek in N; Red L. is in W. Diversified farming; corn, wheat; cattle, hogs. Formed 1875.
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