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Big Sioux River, South Dakota Big Sioux River is a stream located in Union County, SD at N42.49083° W96.44642° (NAD83) and at an elevation of 1069 ft MSL. It can be seen on the USGS 1:24K topographic map Sioux City South, IA.
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Note: Coordinates in the location and feature list above are referenced to NAD83 datum. |