Grizzly Bear Creek near Keystone, SD
Is Grizzly Bear Creek near Keystone, SD flooding right now?
Grizzly Bear Creek near Keystone, SD measured 1.98 ft on 2026-09-11 00:40:00 UTC. That observation was 2.5 ft below its 4.5 ft flood stage. This is the latest available reading, not a guarantee of current conditions.
Gauge height
1.98 ft
Streamflow
—
Minor flooding here begins at 4.5 ft, with major flooding at 6 ft. The highest crest on record was 6.32 ft on Fri, Oct 11, 2013.
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 4 ft | 2.0 ft below |
| Minor flood | 4.5 ft | 2.5 ft below |
| Moderate flood | 5.5 ft | 3.5 ft below |
| Major flood | 6 ft | 4.0 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 6.32 ft | 2013-10-11 |
| 5.78 ft | 2016-05-20 |
| 5.71 ft | 2019-05-28 |
| 5.68 ft | 2015-05-24 |
| 5.6 ft | 2001-07-11 |
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| W.Fork Lafferty Gulch Creek above S.Well at Mt. Rushmore | 0.8 mi | Pennington County |
| Battle Creek above Keystone, SD | 2.3 mi | Pennington County |
| Battle Creek near Keystone, SD | 5.1 mi | Pennington County |
| Grace Coolidge Creek near Hayward, SD | 5.2 mi | Custer County |
| Spring Creek above Sheridan Lake near Keystone, SD | 6.3 mi | Pennington County |
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Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.