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Local Info
Critical Stages
3187.2' - ActionFloodModerate FloodMajor Flood
Cheyenne River - Gauge ANGS2
Angostura Reservoir, SD
Lat: 43.34N, Lon: 103.44W
 
Latest Observation
Updated: 11:15 AM MDT 10/22/25
Stage:3171.18 ft
Flow:-999 kcfs*
* Thousand cubic feet per second
Forecast
hydrograph
Flood Impacts
Historical Crests

Data provided by NOAA Advanced Hydrologic Prediction Service

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