Major Flood
35 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
30 ft
Minor Flood
21 ft
Action Stage
18 ft
What Floods at Each Level
37 ft
Near record flooding occurs with widespread innundation flooding in the woodlands...fields and pastures upstream and downstream from the gage behind the water treatment plant off Mauldin Road. Flood waters up to 8 feet deep will be affecting the athletic fields at the Harris River Park on Mauldin Road and additional athletic fields near the boat ramp off the Georgia Highway 136 Connector. The water level will reach the bottom of the North River Street bridge and begin to flood portions of the road.
35 ft
Major flooding begins. Widespread innundation flooding occurs in the woodlands...fields and pastures upstream and downstream from the gage behind the water treatment plant off Mauldin Road. Flood waters up to 6 feet deep will be affecting the athletic fields at the Harris River Park on Mauldin Road and additional athletic fields near the boat ramp off the Georgia Highway 136 Connector. The water level will be approaching the foundation of a textile mill in Calhoun.
34 ft
Significant flooding continues to expand further into the woodlands...fields and pastures upstream and downstream from the gage behind the water treatment plant off Mauldin Road. A boat ramp and small parking lot on the upstream and right bank side of the Georgia Highway 136 Connector will be under at least 13 feet of water. Flood waters up to 4 feet deep will be affecting the athletic fields at the Harris River Park on Mauldin Road and additional athletic fields near the boat ramp.
32 ft
Significant flooding continues to expand into the woodlands...fields and pastures upstream and downstream from the gage behind the water treatment plant off Mauldin Road. A boat ramp and small parking lot on the upstream and right bank side of the Georgia Highway 136 Connector will be under at least 11 feet of water. Flood waters up to two feet deep will be affecting the athletic fields at the Harris River Park on Mauldin Road and additional athletic fields near the boat ramp.
30 ft
Moderate flooding beings. Significant flooding expands into the woodlands...fields and pastures upstream and downstream from the gage behind the water treatment plant off Mauldin Road. A boat ramp and small parking lot on the upstream and right bank side of the Georgia Highway 136 Connector will be under at least 9 feet of water. Flood waters will be approaching athletic fields at the Harris River Park on Mauldin Road and additional athletic fields near the boat ramp.
29 ft
Minor flooding continues to expand much further into the woodlands...fields and pastures upstream and downstream from the gage behind the water treatment plant off Mauldin Road. A boat ramp and small parking lot on the upstream and right bank side of the Georgia Highway 136 Connector will be under at least 8 feet of water. Flood water will begin to fill in low areas near athletic fields at the Harris River Park on Mauldin Road.
27 ft
Minor flooding continues to expand further into the woodlands...fields and pastures upstream and downstream from the gage behind the water treatment plant off Mauldin Road. A boat ramp and small parking lot on the upstream and right bank side of the Georgia Highway 136 Connector will be under at least 6 feet of water.
25 ft
Minor flooding continues to expand into the woodlands...fields and pastures upstream and downstream from the gage behind the water treatment plant off Mauldin Road. A boat ramp and small parking lot on the upstream and right bank side of the Georgia Highway 136 Connector will be under at least 4 feet of water.
23 ft
Minor flooding continues to expand into the woodlands...fields and pastures upstream and downstream from the gage behind the water treatment plant off Mauldin Road. A boat ramp and small parking lot on the upstream and right bank side of the Georgia Highway 136 Connector will be under at least 2 feet of water.
21 ft
Minor flooding begins of woodlands...fields and pastures upstream and downstream from the gage behind a water treatment plant off Mauldin Road. A boat ramp and portions of a small parking lot on the upstream and right bank side of the Georgia Highway 136 Connector will be under water.
18 ft
Bankfull is reached upstream and downstream from the river gauge behind the water treatment plant off Mauldin Road. The water level reaches the top of the boat ramp just upstream from the Georgia Highway 136 Connector or North River Street bridge.
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 18, 1990 | 34.15 ft | 45,500 cfs |
| Dec 28, 2015 | 29.97 ft | 28,931 cfs |
| Mar 23, 1980 | 29.71 ft | 27,900 cfs |
About This Gauge
USGS Site
NWS LID
CALG1
River
Oostanaula River
County
Gordon, GA
Coordinates
34.5189°N, 84.9544°W
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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 Oostanaula River at Calhoun?
The Oostanaula River at Calhoun gauge is maintained by USGS (site 02387520) 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 Oostanaula River at Calhoun?
The NWS-defined flood stage for Oostanaula River at Calhoun is 21 feet. Action stage begins at 18 feet. Moderate flooding starts at 30 feet, and major flooding at 35 feet.
How do I get alerts when Oostanaula River rises?
Download StormCast free on Google Play, go to River Gauges, and add Oostanaula River at Calhoun 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 Oostanaula River at Calhoun gauge located?
The gauge is located in Gordon County, Georgia at coordinates 34.5189°N, 84.9544°W. USGS site number: 02387520. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- Automated gauge readings are now available, courtesy of the USGS.