Manalapan Brook at Spotswood NJ

Middlesex County, New Jersey · USGS gauge 01405400 · NWS SPTN4 · New Jersey river levels

Is Manalapan Brook at Spotswood NJ flooding right now?

Manalapan Brook at Spotswood NJ measured 9.94 ft on 2026-09-11 01:15:00 UTC. That observation was 9.1 ft below its 19 ft flood stage. This is the latest available reading, not a guarantee of current conditions.

Gauge height
9.94 ft
as of 56 min ago
Streamflow
23 cfs
data refreshed 9 min ago

Minor flooding here begins at 19 ft, with major flooding at 22 ft. The highest crest on record was 22.22 ft on Sun, Aug 28, 2011.

Streamflow outlook

NOAA National Water Model forecast, issued 14 hours ago. The NWM models discharge for every river reach in the country, including the many gauges the National Weather Service does not forecast individually. It is a model, not an official NWS river forecast, and it predicts flow rather than water level.

Flood stages at this gauge

CategoryStageCurrent distance
Action18.5 ft8.6 ft below
Minor flood19 ft9.1 ft below
Moderate flood21 ft11.1 ft below
Major flood22 ft12.1 ft below

New to these numbers? What does flood stage mean? · How to read a river gauge · Why is the river rising?

Highest crests on record

StageDate
22.22 ft2011-08-28
20.42 ft2005-07-18
20.31 ft2014-05-01
20.08 ft2007-04-16
19.97 ft1989-09-20

Last 7 days

Past 7 days · 9.94–10.73 ft

Nearby gauges

GaugeDistanceCounty
South River at Old Bridge NJ1.6 miMiddlesex County
Deep Run at Old Bridge NJ2.8 miMiddlesex County
Lawrence Brook at Farrington Dam NJ5.3 miMiddlesex County
Lawrence Brook at Westons Mills NJ6.6 miMiddlesex County
Big Brook near Marlboro NJ10.4 miMonmouth County
Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.

Sources: USGS monitoring location · NWS gauge & forecast