Major Flood
16 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
11 ft
Minor Flood
10 ft
Action Stage
8 ft
What Floods at Each Level
11 ft
The D and R canal is flooded by the Millstone River.
10 ft
River Road between Yorktown and Amsterdam is subject to closure. Canal Road near Suydam Road floods.
8 ft
Causeways are closed to due flooding.
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 2, 2021 | 22.45 ft | 37,320 cfs |
| Sep 16, 1999 | 22.3 ft | -9,999 cfs |
| Aug 27, 2011 | 22.3 ft | -9,999 cfs |
About This Gauge
USGS Site
NWS LID
MITN4
River
Millstone River
County
Somerset, NJ
Coordinates
40.5028°N, 74.5875°W
Get Flood Alerts for Millstone 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 Millstone River at Millstone?
The Millstone River at Millstone gauge is maintained by USGS (site 01402500) 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 Millstone River at Millstone?
The NWS-defined flood stage for Millstone River at Millstone is 10 feet. Action stage begins at 8 feet. Moderate flooding starts at 11 feet, and major flooding at 16 feet.
How do I get alerts when Millstone River rises?
Download StormCast free on Google Play, go to River Gauges, and add Millstone River at Millstone 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 Millstone River at Millstone gauge located?
The gauge is located in Somerset County, New Jersey at coordinates 40.5028°N, 74.5875°W. USGS site number: 01402500. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Millstone River
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey