Major Flood
13 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
9.5 ft
Action Stage
8.5 ft
What Floods at Each Level
14 ft
Flooding expands across the above mentioned areas. Roads are barricaded and closed.
13 ft
Sweetbriar Avenue from Whitehead Road to Trinity Avenue is flooded and is subject to closures. Residential basements are flooded on Sweetbriar Avenue. The Whitehead Bridge connecting Hamilton and Lawrence is closed.
12 ft
Assunpink Boulevard from 1st to 5th Avenue is flooded and is subject to closures. Rutgers Avenue from Sweetbriar Avenue to Trinity Avenue is flooded and is subject to closures.
11 ft
Brown Avenue from Rutgers Avenue to Vetterlein Avenue is flooded and is subject to closures. Whitehead Road from 7th Avenue to Township Line is flooded and is subject to closures.
10 ft
Assunpink Boulevard floods. Carnegie Road floods. Rutgers Avenue from Amhurst Avenue to the dead end floods and is subject to closures.
8.5 ft
The Delaware and Raritan Canal State Park trail 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 |
|---|---|---|
| Sep 2, 2021 | 15.82 ft | 25,320 cfs |
| May 1, 2014 | 14.29 ft | 22,260 cfs |
| May 27, 2018 | 12.86 ft | 19,400 cfs |
About This Gauge
USGS Site
NWS LID
MERN4
River
Assunpink Creek
County
Mercer, NJ
Coordinates
40.2475°N, 74.7278°W
Get Flood Alerts for Assunpink 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 Assunpink Creek near Mercerville?
The Assunpink Creek near Mercerville gauge is maintained by USGS (site 01463882) 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 Assunpink Creek near Mercerville?
The NWS-defined flood stage for Assunpink Creek near Mercerville is 9.5 feet. Action stage begins at 8.5 feet. Moderate flooding starts at 11 feet, and major flooding at 13 feet.
How do I get alerts when Assunpink Creek rises?
Download StormCast free on Google Play, go to River Gauges, and add Assunpink Creek near Mercerville 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 Assunpink Creek near Mercerville gauge located?
The gauge is located in Mercer County, New Jersey at coordinates 40.2475°N, 74.7278°W. USGS site number: 01463882. 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