Major Flood
25 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
19 ft
Minor Flood
13 ft
Action Stage
11 ft
What Floods at Each Level
25 ft
Major flooding begins with widespread inundation along the river. The Flakes Mill Road bridge forms an obstacle and acts like a dam causing some backwater and erosion eddies to the sides of the bridge. The service road leading to the Snapfinger Advanced Wastewater Treatment Facility will be under water. The west and south sides of the property will be completely flooded with water spilling into the holding areas of the Inflow Channel. Some homes on Roundtable and English Valley Drives will begin to flood.
23 ft
Significant flooding expands further from the river. The Flakes Mill Road bridge begins to form an obstacle and act like a dam causing some backwater and erosion eddies to the sides of the bridge. The flood waters will cut off large portions of the service road leading to the Snapfinger Advanced Wastewater Treatment Facility. Parking lots and large portions of the west and south sides of the property will be completely flooded. Backyards of Roundtable and English Valley Drives will also be flooded.
21 ft
Significant flooding expands into the woodlands upstream and downstream from the gage on Flakes Mill Road. The water level reaches the bottom of the bridge and county officials may close it. The flood waters will cut off portions of the service road leading to the Snapfinger Advanced Wastewater Treatment Facility. The parking lots south of the administration building on the property will be under two feet of water. Flooding in backyards of homes on Roundtable and English Valley Drives continues to deepen.
19 ft
Moderate flooding begins. Significant flooding expands further into the woodlands along the river upstream and downstream from the gage on Flakes Mill Road. The Chapel Park west of the gage will be completely flooded. The flood waters will cover low portions of the service road leading to the Snapfinger Advanced Wastewater Treatment Facility...and affect the parking lots south of the administration building on the property. Flooding begins in backyards of homes on Roundtable and English Valley Drives.
17 ft
Minor flooding expands further into the woodlands along the river upstream and downstream from the gage on Flakes Mill Road. Large portions of the Chapel Park west of the gage will be under 4 to 5 feet of water. The flood waters will approach low portions of the service road leading to the Snapfinger Advanced Wastewater Treatment Facility.
15 ft
Minor flooding continues to expand further into the woodlands along the river upstream and downstream from the gage on Flakes Mill Road. Large portions of the Chapel Park west of the gage will be under 2 to 3 feet of water.
13 ft
Flood stage is reached. Minor flooding will occur in the woodlands and natural flood plain of the river upstream and downstream from the gage on Flakes Mill Road. Portions of the Chapel Park just west of the gage will begin to flood.
11 ft
Bankfull conditions are reached upstream and downstream from the gage at Flakes Mill Road near Chapel Park.
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 |
|---|---|---|
| Sep 27, 2024 | 21.42 ft | 13,072 cfs |
| Feb 24, 1961 | 21.3 ft | 12,500 cfs |
| Mar 15, 1976 | 19.89 ft | 11,000 cfs |
About This Gauge
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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 South River at Flakes Mill Road near Snapfinger?
The South River at Flakes Mill Road near Snapfinger gauge is maintained by USGS (site 02203900) 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 South River at Flakes Mill Road near Snapfinger?
The NWS-defined flood stage for South River at Flakes Mill Road near Snapfinger is 13 feet. Action stage begins at 11 feet. Moderate flooding starts at 19 feet, and major flooding at 25 feet.
How do I get alerts when South River rises?
Download StormCast free on Google Play, go to River Gauges, and add South River at Flakes Mill Road near Snapfinger 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 South River at Flakes Mill Road near Snapfinger gauge located?
The gauge is located in De Kalb County, Georgia at coordinates 33.6661°N, 84.2247°W. USGS site number: 02203900. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on South River
On This River
Upstream: South River at Bouldercrest Road at Atlanta
Downstream: South River at Klondike Road near Lithonia
More Resources
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.