Major Flood
3211 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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This is an NWS forecast point (LID: AACS2). Live data may be limited. View on NWS AHPS →
FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
3209 ft
Minor Flood
3207 ft
Action Stage
3206 ft
What Floods at Each Level
3211 ft
Major flood stage. Significant flooding along the Cheyenne River upstream from Angostura Reservoir. Water will backup along the Highway 71 road embankment, although no impacts to Highway 71 are expected. Major flooding of agricultural land.
3209 ft
Moderate flood stage. Widespread flooding of agricultural land along the Cheyenne River upstream of Angostura Reservoir. The park and parking area near the Highway 71 bridge will be flooded and unusable. Water may begin to backup behind the road embankment in places.
3207 ft
Minor flood stage. Minor flooding of agricultural land along the Cheyenne River upstream of Angostura Reservoir.
3206 ft
Action stage. Low lying areas of the Cheyenne River upstream of Angostura may flood.
Impact statements from the National Weather Service, describing what typically happens at each water level.
Low-Water Impacts
5 ft
Stage needed to inundate designated Gulf Sturgeon critical habitat below Jim Woodruff Lock and Dam.
3 ft
Temporary (not sustainable) operating level for of Scholz Power Plant
What happens as water levels drop, per the National Weather Service.
7-Day Water Level Chart
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About This Gauge
NWS LID
AACS2
River
Cheyenne River
County
Fall River, SD
Coordinates
43.3058°N, 103.5628°W
Get Flood Alerts for Cheyenne 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 Cheyenne River above Angostura at Hwy 71?
The Cheyenne River above Angostura at Hwy 71 gauge is maintained by USGS 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 Cheyenne River above Angostura at Hwy 71?
The NWS-defined flood stage for Cheyenne River above Angostura at Hwy 71 is 3207 feet. Action stage begins at 3206 feet. Moderate flooding starts at 3209 feet, and major flooding at 3211 feet.
How do I get alerts when Cheyenne River rises?
Download StormCast free on Google Play, go to River Gauges, and add Cheyenne River above Angostura at Hwy 71 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 Cheyenne River above Angostura at Hwy 71 gauge located?
The gauge is located in Fall River County, South Dakota at coordinates 43.3058°N, 103.5628°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: South Dakota Department of Agriculture and Natural Resources