Major Flood
62 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
57 ft
Minor Flood
32 ft
Action Stage
20 ft
What Floods at Each Level
52 ft
Cave tours that use the lower levels of the cave are closed.
42 ft
Echo River Spring Trail and parking lot are under water and not accessible.
32 ft
Green River Ferry closes to all traffic due to high water.
20.1 ft
Launching of paddle craft is prohibited.
20 ft
Green River Ferry closes to RV and trailer traffic due to high water. Heavy loads will be at the judgment of the ferry operator considering the 12 ton load limit of ferry. Backcountry camping on the Green River floodplain is prohibited.
Impact statements from the National Weather Service, describing what typically happens at each water level.
Low-Water Impacts
10.5
Green River Ferry closes to RV/Trailer traffic and heavy loads due to low water.
9.5
Green River Ferry is closed to all traffic due to low water.
What happens as water levels drop, per the National Weather Service.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Apr 6, 2025 | 59.66 ft | 56,400 cfs |
| Feb 18, 2025 | 52.46 ft | 45,200 cfs |
| Jan 23, 1937 | 52 ft | 75,000 cfs |
About This Gauge
USGS Site
NWS LID
MMCK2
River
Green River (KY)
County
Edmonson, KY
Coordinates
37.1800°N, 86.1125°W
Get Flood Alerts for Green River (KY)
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 Green River (KY) near Mammoth Cave?
The Green River (KY) near Mammoth Cave gauge is maintained by USGS (site 03309000) 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 Green River (KY) near Mammoth Cave?
The NWS-defined flood stage for Green River (KY) near Mammoth Cave is 32 feet. Action stage begins at 20 feet. Moderate flooding starts at 57 feet, and major flooding at 62 feet.
How do I get alerts when Green River (KY) rises?
Download StormCast free on Google Play, go to River Gauges, and add Green River (KY) near Mammoth Cave 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 Green River (KY) near Mammoth Cave gauge located?
The gauge is located in Edmonson County, Kentucky at coordinates 37.1800°N, 86.1125°W. USGS site number: 03309000. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Green River (KY)
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Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.