RIVER GAUGE · BIG SIOUX RIVER
Big Sioux River near Florence
Grant County, South Dakota
Water level2.87 ft
Flow10 cfs
Last readingSep 16, 2026, 5:00 PM UTC (last recorded)
Action7 ft
Minor flood8 ft
Moderate flood8.5 ft
Major flood9 ft
The past week
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What floods at each level
- 12 ft
The bridge at the gauge and the bridge 2 miles south of the gauge are both overtopped
- 10.5 ft
The bridge 1 mile north of the gauge is overtopped
- 10 ft
The water reaches the bottom of the bridge at the gauge and the bridge 2 miles south of the gauge the bridge 1 mile east and 1 1/2 mile north of the gauge is overtopped
- 9 ft
The water reaches the bottom of the bridge 1 mile north of the gauge
- 8.5 ft
The water reaches the bottom of the bridge 1 mile east and 1 1/2 mile north of the gauge
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Apr 12, 2023 | 9.7 ft | 2,480 cfs |
| Apr 1, 1997 | 9.52 ft | 2,000 cfs |
| Jul 24, 1993 | 9.18 ft | 1,280 cfs |
More on Big Sioux River
DownstreamBig Sioux River near Watertown
Big Sioux River near Brandon
Big Sioux River near Bruce
Big Sioux River near Brookings
Big Sioux River near Estelline
Big Sioux River above Flandreau
Big Sioux River near Jefferson
Big Sioux River near Richland
Big Sioux River below Watertown
Big Sioux River above Canton
Big Sioux River near Castlewood
Get an alert when Big Sioux River rises
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