Major Flood
11 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
10 ft
Minor Flood
9.5 ft
Action Stage
8 ft
What Floods at Each Level
11 ft
Major Flood Stage. Extensive inundation of structures and roads possible due to flooding on Grace Coolidge Creek.
10 ft
Moderate Flood Stage. Some inundation of structures and roads along Grace Coolidge Creek.
9.5 ft
Minor Flood Stage. Minor flooding along Grace Coolidge Creek. Low lying roads in Custer State Park may become impassable.
8.5 ft
Grace Coolidge Creek begins to overflow roads in Custer State Park.
8 ft
Low land flooding along the creek begins.
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 |
|---|---|---|
| Feb 8, 1979 | 12.76 ft | — |
| May 7, 1995 | 11.39 ft | 765 cfs |
| Jun 14, 1976 | 10.9 ft | 980 cfs |
About This Gauge
USGS Site
NWS LID
GCOS2
River
Grace Coolidge Creek
County
Custer, SD
Coordinates
43.7611°N, 103.3636°W
Get Flood Alerts for Grace Coolidge Creek
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 Grace Coolidge Creek near Custer?
The Grace Coolidge Creek near Custer gauge is maintained by USGS (site 06404998) 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 Grace Coolidge Creek near Custer?
The NWS-defined flood stage for Grace Coolidge Creek near Custer is 9.5 feet. Action stage begins at 8 feet. Moderate flooding starts at 10 feet, and major flooding at 11 feet.
How do I get alerts when Grace Coolidge Creek rises?
Download StormCast free on Google Play, go to River Gauges, and add Grace Coolidge Creek near Custer 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 Grace Coolidge Creek near Custer gauge located?
The gauge is located in Custer County, South Dakota at coordinates 43.7611°N, 103.3636°W. USGS site number: 06404998. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
Data provided by: Observations courtesy of U.S. Geological Survey
- Gauge reading may be affected by ice.