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Assunpink Creek near Mercerville

Highest listed crest 15.82 ftFlood stage 9.5 ft7 crests since 2014

The Assunpink Creek near Mercerville crested at major flood stage 2 times among the 7 crests the National Weather Service lists from 2014 to 2024. The highest, 15.82 ft on September 2, 2021, was major flooding, 6.32 feet above flood stage. 1 other gauge on the Assunpink Creek crested above flood stage within a week of it.

The gauge

Highest listed crest
15.82 ft
September 2, 2021; 25,320 cubic feet per second
Flood stage
9.5 ft
Major flooding from 13.0 ft
Crests at major
2
49th of 125 gauges in New Jersey
Most recent flood crest
January 10, 2024
11.04 ft, moderate flooding
Location
Mercer County
Near Trenton (2.5 mi), Princeton (8.3 mi), Burlington (13.4 mi)

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Assunpink Creek near Mercerville
Action stage8.50—The level at which the NWS or its partners begin to take action
Flood stage (minor)9.51Jul 18, 2021Minimal or no property damage, but possibly some public threat
Moderate flood stage11.04Jan 10, 2024Some inundation of structures and roads near the stream
Major flood stage13.02Sep 2, 2021Extensive inundation of structures and roads

Every listed crest

7 crests from 2014 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Assunpink Creek near Mercerville, 2014 to 2024 810121416ft Flood stage 9.5 ftMajor 13.0 ft May 1, 2014: 14.29 ft, major flooding; 22,260 cubic feet per secondMay 27, 2018: 12.86 ft, moderate flooding; 19,400 cubic feet per secondNov 25, 2018: 12.31 ft, moderate flooding; 18,300 cubic feet per secondJul 18, 2021: 9.68 ft, minor flooding; 13,040 cubic feet per secondSep 2, 2021: 15.82 ft, major flooding; 25,320 cubic feet per secondDec 18, 2023: 11.72 ft, moderate flooding; 17,120 cubic feet per secondJan 10, 2024: 11.04 ft, moderate flooding; 15,760 cubic feet per second Highest, 15.82 ft, Sep 2, 2021 201520202025

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Assunpink Creek near Mercerville 2010s: 3 2020s: 4 4 2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Assunpink Creek near Mercerville
1Sep 2, 202115.82+6.32Major25,320
2May 1, 201414.29+4.79Major22,260
3May 27, 201812.86+3.36Moderate19,400
4Nov 25, 201812.31+2.81Moderate18,300
5Dec 18, 202311.72+2.22Moderate17,120
6Jan 10, 202411.04+1.54Moderate15,760
7Jul 18, 20219.68+0.18Minor13,040

The worst floods along the Assunpink Creek

For this gauge's highest crests, the other gauges on the Assunpink Creek that crested above flood stage within a week.

September 2, 2021: 15.82 ft here, major flooding

  • TrentonNJ · Sep 2, 2021 · 12.59 ft · Major

May 1, 2014: 14.29 ft here, major flooding

  • TrentonNJ · May 1, 2014 · 11.62 ft · Major

May 27, 2018: 12.86 ft here, moderate flooding

  • TrentonNJ · May 27, 2018 · 10.16 ft · Moderate

Gauges on the Assunpink Creek

In USGS station-number order, which runs downstream within a river basin.

Flood gauges on the Assunpink Creek
ClarksvilleNJ8.010.90 ft, Aug 28, 19710
Mercerville this gaugeNJ9.515.82 ft, Sep 2, 20212
TrentonNJ8.515.12 ft, Aug 28, 20119

Other gauges in Mercer County

Flood gauges in Mercer County
Clarksville8.010.90 ft, Aug 28, 19710
Trenton8.515.12 ft, Aug 28, 20119
Extonville12.017.10 ft, Aug 28, 20110
Trenton20.030.60 ft, Mar 8, 19045
Princeton9.016.23 ft, Aug 28, 20113

Mercer County: every hazard · River floods across the country · New Jersey

NOAA National Water Prediction Service, gauge MERN4, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.