Major Flood
20 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
16 ft
Minor Flood
11 ft
Action Stage
9 ft
What Floods at Each Level
14 ft
Minor flooding continues to expand further into the residential yards and woodlands upstream and downstream from the gage on Roswell Road. The water will be from 3 to 6 feet deep in the East Cobb Park on the right bank of the creek. A portion of Robinson Road over the creek by Robinson Farms Drive will be flooded with at least 3 feet of water. The athletic field next to the creek off Robinson Road will be flooded with several feet of water.
13 ft
Minor flooding continues to expand further into the residential yards and woodlands upstream and downstream from the gage on Roswell Road. The water will be from 2 to 5 feet deep in the East Cobb Park on the right bank of the creek. A portion of Robinson Road over the creek by Robinson Farms Drive will be flooded with at least 2 feet of water. The athletic field next to the creek off Robinson Road will be flooded with several feet of water.
12 ft
Minor flooding continues of the residential yards and woodlands upstream and downstream from the gage on Roswell Road. The water will be from 1 to 4 feet deep in the East Cobb Park on the right bank of the creek. The portion of Robinson Road over the creek and by Robinson Farms Drive will be flooded with at least one foot of water. The athletic field next to the creek off Robinson Road will be flooded with a few feet of water.
11 ft
Flood stage is reached. Minor flooding of residential yards and woodlands occurs upstream and downstream from the gage on Roswell Road. The water will be up to three feet deep in the lower portions of East Cobb Park on the right bank of the creek. The water level will begin to hit the Robinson Road bridge. The athletic field next to the creek off Robinson Road will begin to flood.
9 ft
Bankfull conditions are reached upstream and downstream from the gage on Roswell Road. Water begins to flow into low areas of East Cobb Park on the right bank of the creek.
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 21, 2009 | 13.26 ft | 1,164 cfs |
| Jul 12, 2012 | 12.21 ft | 1,059 cfs |
| Sep 8, 2021 | 11.32 ft | 970 cfs |
About This Gauge
USGS Site
NWS LID
SMCG1
River
Sewell Mill Creek
County
Cobb, GA
Coordinates
33.9792°N, 84.4522°W
Get Flood Alerts for Sewell Mill 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 Sewell Mill Creek at GA 120 near Marietta?
The Sewell Mill Creek at GA 120 near Marietta gauge is maintained by USGS (site 023358685) 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 Sewell Mill Creek at GA 120 near Marietta?
The NWS-defined flood stage for Sewell Mill Creek at GA 120 near Marietta is 11 feet. Action stage begins at 9 feet. Moderate flooding starts at 16 feet, and major flooding at 20 feet.
How do I get alerts when Sewell Mill Creek rises?
Download StormCast free on Google Play, go to River Gauges, and add Sewell Mill Creek at GA 120 near Marietta 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 Sewell Mill Creek at GA 120 near Marietta gauge located?
The gauge is located in Cobb County, Georgia at coordinates 33.9792°N, 84.4522°W. USGS site number: 023358685. Data is provided by the U.S. Geological Survey and the National Weather Service.
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.