
The Missouri River corridor at the turn of the century serves as a vital tri-state boundary between South Dakota, Nebraska, and Iowa. This survey, based on 1890s data, illustrates a landscape defined by its waterways, where the Big Sioux River and Vermillion River converge toward the Missouri. Before modern bridges dominated the region, critical transit points like the Vermilion Ferry and Ponca Ferry facilitated movement across these broad channels.
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