Major Flood
1440 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
1423 ft
Minor Flood
1422.5 ft
Action Stage
1422 ft
What Floods at Each Level
1422 ft
Base of the exclusive flood control zone
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Jun 3, 1991 | 1422.1 ft | 45,500 cfs |
| Apr 21, 1971 | 1421.9 ft | 61,600 cfs |
| Jun 21, 2011 | 1421.8 ft | 166,300 cfs |
About This Gauge
Get Flood Alerts for Missouri River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Missouri River at Big Bend Dam?
The Missouri River at Big Bend Dam gauge is maintained by USGS (site 06442700) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Missouri River at Big Bend Dam?
The NWS-defined flood stage for Missouri River at Big Bend Dam is 1422.5 feet. Action stage begins at 1422 feet. Moderate flooding starts at 1423 feet, and major flooding at 1440 feet.
How do I get alerts when Missouri River rises?
Download StormCast free on Google Play, go to River Gauges, and add Missouri River at Big Bend Dam to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Missouri River at Big Bend Dam gauge located?
The gauge is located in Lyman County, South Dakota at coordinates 44.0383°N, 99.4458°W. USGS site number: 06442700. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: Observations courtesy of US Army Corps of Engineers
- Gauge reading affected by reservoir operations.