Major Flood
30 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
26 ft
Minor Flood
22 ft
Action Stage
15 ft
What Floods at Each Level
30 ft
The town of Reigelsville, Pennsylvania begins to flood.
26 ft
River Road in Carpentersville is flooded and is subject to closures. Street flooding begins in Riegelsville at the intersection of PA Route 611 and Sycamore Road.
22 ft
Pohatcong Creek floods Creek Road due to high and backwater from the Delaware River. The Musconetcong River also floods Mount Joy Road due to high and backwater from the Delaware River.
18 ft
River Road floods in Pohatcong Township, north of the bridge.
15 ft
Treasure Island Scout Camp floods.
14.5 ft
The entrance to Bull Island State Park is closed. Unsafe to cross over to Treasure Island Scout Camp.
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 | 38.85 ft | 340,000 cfs |
| Oct 9, 1903 | 35.9 ft | 291,500 cfs |
| Apr 3, 2005 | 34.07 ft | 262,000 cfs |
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
RGLN4
River
Delaware River
County
Hunterdon, NJ
Coordinates
40.5947°N, 75.1897°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 Riegelsville?
The Delaware River at Riegelsville gauge is maintained by USGS (site 01457500) 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 Riegelsville?
The NWS-defined flood stage for Delaware River at Riegelsville is 22 feet. Action stage begins at 15 feet. Moderate flooding starts at 26 feet, and major flooding at 30 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 Riegelsville 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 Riegelsville gauge located?
The gauge is located in Hunterdon County, New Jersey at coordinates 40.5947°N, 75.1897°W. USGS site number: 01457500. 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