Major Flood
22 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
21 ft
Minor Flood
19 ft
Action Stage
18.5 ft
What Floods at Each Level
22 ft
The Immaculate Conception parking lot takes on water. Flooding increases on both Devoe and Mundy Avenues. Residential and township properties take on water. Downstream tides can affect Lake Devoe levels and subsequent flooding.
21 ft
Mundy Avenue flooding increases. Devoe Avenue floods. Both roads become impassable. Flood waters approach residential and township properties. Downstream tides can affect Lake Devoe levels and subsequent flooding.
19 ft
Mundy Avenue, connecting Spotswood and Old Bridge, is subject to flooding and closure. Downstream tides can affect Lake Devoe levels and subsequent 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 |
|---|---|---|
| Aug 27, 2011 | 22.22 ft | — |
| Jul 18, 2005 | 20.42 ft | 2,550 cfs |
| May 1, 2014 | 20.31 ft | 2,316 cfs |
About This Gauge
USGS Site
NWS LID
SPTN4
River
Manalapan Brook
County
Middlesex, NJ
Coordinates
40.3894°N, 74.3908°W
Get Flood Alerts for Manalapan Brook
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 Manalapan Brook at Spotswood?
The Manalapan Brook at Spotswood gauge is maintained by USGS (site 01405400) 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 Manalapan Brook at Spotswood?
The NWS-defined flood stage for Manalapan Brook at Spotswood is 19 feet. Action stage begins at 18.5 feet. Moderate flooding starts at 21 feet, and major flooding at 22 feet.
How do I get alerts when Manalapan Brook rises?
Download StormCast free on Google Play, go to River Gauges, and add Manalapan Brook at Spotswood 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 Manalapan Brook at Spotswood gauge located?
The gauge is located in Middlesex County, New Jersey at coordinates 40.3894°N, 74.3908°W. USGS site number: 01405400. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey