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
18 ft
Minor Flood
16 ft
Action Stage
14 ft
What Floods at Each Level
21 ft
Front Street and Railraod Avenue flood in Frenchtown.
17 ft
Treasure Island is flooded. River Road in Erwinna Pennsylvania floods.
16 ft
Portions of River Road and South Washington Street flood.
15.5 ft
Portions of Trenton Avenue take on water.
13 ft
Marshall Island is inundated.
9 ft
Walls Island north of Frenchtown floods.
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 |
|---|---|---|
| Aug 19, 1955 | 27.79 ft | -9,999 cfs |
| Oct 9, 1903 | 24.4 ft | — |
| Apr 4, 2005 | 23.6 ft | — |
Flood Inundation Map
NOAA has mapped what areas flood at different water levels for this gauge. View the interactive flood inundation map →
About This Gauge
USGS Site
NWS LID
FREN4
River
Delaware River
County
Hunterdon, NJ
Coordinates
40.5261°N, 75.0650°W
Get Flood Alerts for Delaware River
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 Delaware River at Frenchtown?
The Delaware River at Frenchtown gauge is maintained by USGS (site 01458500) 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 Delaware River at Frenchtown?
The NWS-defined flood stage for Delaware River at Frenchtown is 16 feet. Action stage begins at 14 feet. Moderate flooding starts at 18 feet, and major flooding at 20 feet.
How do I get alerts when Delaware River rises?
Download StormCast free on Google Play, go to River Gauges, and add Delaware River at Frenchtown 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 Delaware River at Frenchtown gauge located?
The gauge is located in Hunterdon County, New Jersey at coordinates 40.5261°N, 75.0650°W. USGS site number: 01458500. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: Delaware Joint Toll Bridge Comm., Observations courtesy of U.S. Geological Survey