Search
Menu

Explore

Hazards

Analysis

Rankings

Reference

Pequannock River at Macopin

Highest listed crest 7.75 ftFlood stage 5.5 ft32 crests since 1936

The Pequannock River at Macopin crested at major flood stage 2 times among the 32 crests the National Weather Service lists from 1936 to 2024. The highest, 7.75 ft on March 12, 1936, was major flooding, 2.25 feet above flood stage.

The gauge

Highest listed crest
7.75 ft
March 12, 1936
Flood stage
5.5 ft
Major flooding from 7.5 ft
Crests at major
2
49th of 125 gauges in New Jersey
Most recent flood crest
January 10, 2024
6.76 ft, moderate flooding
Location
Passaic County
Near Kinnelon (2.6 mi), Pompton Lakes (6.1 mi), Wanaque (6.1 mi)

Flood stages

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

Flood categories, Pequannock River at Macopin
Action stage5.02Mar 23, 2010The level at which the NWS or its partners begin to take action
Flood stage (minor)5.522Dec 18, 2023Minimal or no property damage, but possibly some public threat
Moderate flood stage6.55Jan 10, 2024Some inundation of structures and roads near the stream
Major flood stage7.52Aug 19, 1955Extensive inundation of structures and roads

Every listed crest

32 crests from 1936 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Pequannock River at Macopin, 1936 to 2024 45678ft Flood stage 5.5 ftMajor 7.5 ft Mar 12, 1936: 7.75 ft, major floodingAug 19, 1955: 7.60 ft, major floodingMar 29, 1993: 5.82 ft, minor flooding; 1,130 cubic feet per secondMar 24, 1994: 5.53 ft, minor flooding; 970 cubic feet per secondJan 19, 1996: 6.31 ft, minor flooding; 1,960 cubic feet per secondOct 20, 1996: 6.73 ft, moderate flooding; 2,350 cubic feet per secondMay 11, 1998: 5.97 ft, minor flooding; 1,600 cubic feet per secondSep 16, 1999: 4.81 ft, below flood stage; 530 cubic feet per secondMar 25, 2003: 6.31 ft, minor flooding; 1,940 cubic feet per secondJun 1, 2003: 5.57 ft, minor floodingDec 12, 2003: 5.78 ft, minor floodingDec 25, 2003: 5.31 ft, action stageApr 3, 2005: 6.12 ft, minor flooding; 1,760 cubic feet per secondApr 16, 2007: 6.38 ft, minor flooding; 2,010 cubic feet per secondMar 14, 2010: 6.56 ft, moderate floodingMar 23, 2010: 5.48 ft, action stageMar 31, 2010: 5.59 ft, minor floodingMar 7, 2011: 5.93 ft, minor flooding; 1,580 cubic feet per secondMar 11, 2011: 7.17 ft, moderate flooding; 2,783 cubic feet per secondApr 17, 2011: 5.70 ft, minor floodingAug 28, 2011: 7.42 ft, moderate flooding; 3,030 cubic feet per secondSep 9, 2011: 6.07 ft, minor flooding; 1,727 cubic feet per secondMay 1, 2014: 6.06 ft, minor flooding; 1,868 cubic feet per secondAug 5, 2018: 5.69 ft, minor flooding; 1,423 cubic feet per secondNov 3, 2018: 5.95 ft, minor flooding; 1,728 cubic feet per secondDec 22, 2018: 5.62 ft, minor flooding; 1,349 cubic feet per secondDec 25, 2020: 5.95 ft, minor flooding; 1,728 cubic feet per secondAug 23, 2021: 5.85 ft, minor flooding; 1,606 cubic feet per secondSep 2, 2021: 5.99 ft, minor flooding; 1,790 cubic feet per secondApr 8, 2022: 5.87 ft, minor flooding; 1,653 cubic feet per secondDec 18, 2023: 6.30 ft, minor flooding; 2,207 cubic feet per secondJan 10, 2024: 6.76 ft, moderate flooding; 2,849 cubic feet per second Highest, 7.75 ft, Mar 12, 1936 19401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Pequannock River at Macopin 1930s: 1 1940s: 0 1950s: 1 1960s: 0 1970s: 0 1980s: 0 1990s: 5 2000s: 5 2010s: 11 11 2020s: 6 1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s
  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.
  3. 5 crests measured on an earlier gauge datum are left out: 9.40 ft on Oct 10, 1903; 7.70 ft on May 29, 1968; 7.33 ft on Jun 23, 1972; 7.30 ft on Feb 3, 1973; 8.90 ft on Apr 5, 1984.

Highest crests

Highest listed crests, Pequannock River at Macopin
1Mar 12, 19367.75+2.25Major—
2Aug 19, 19557.60+2.10Major—
3Aug 28, 20117.42+1.92Moderate3,030
4Mar 11, 20117.17+1.67Moderate2,783
5Jan 10, 20246.76+1.26Moderate2,849
6Oct 20, 19966.73+1.23Moderate2,350
7Mar 14, 20106.56+1.06Moderate—
8Apr 16, 20076.38+0.88Minor2,010
9Jan 19, 19966.31+0.81Minor1,960
10Mar 25, 20036.31+0.81Minor1,940
11Dec 18, 20236.30+0.80Minor2,207
12Apr 3, 20056.12+0.62Minor1,760
13Sep 9, 20116.07+0.57Minor1,727
14May 1, 20146.06+0.56Minor1,868
15Sep 2, 20215.99+0.49Minor1,790
16May 11, 19985.97+0.47Minor1,600
17Nov 3, 20185.95+0.45Minor1,728
18Dec 25, 20205.95+0.45Minor1,728
19Mar 7, 20115.93+0.43Minor1,580
20Apr 8, 20225.87+0.37Minor1,653
21Aug 23, 20215.85+0.35Minor1,606
22Mar 29, 19935.82+0.32Minor1,130
23Dec 12, 20035.78+0.28Minor—
24Apr 17, 20115.70+0.20Minor—
25Aug 5, 20185.69+0.19Minor1,423
26Dec 22, 20185.62+0.12Minor1,349
27Mar 31, 20105.59+0.09Minor—
28Jun 1, 20035.57+0.07Minor—
29Mar 24, 19945.53+0.03Minor970
30Mar 23, 20105.48−0.02Action—
31Dec 25, 20035.31−0.19Action—
32Sep 16, 19994.81−0.69Below flood stage530

The worst floods along the Pequannock River

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

August 28, 2011: 7.42 ft here, moderate flooding

  • RiverdaleNJ · Aug 28, 2011 · 12.57 ft · Major

January 10, 2024: 6.76 ft here, moderate flooding

  • RiverdaleNJ · Jan 10, 2024 · 8.55 ft · Minor

Gauges on the Pequannock River

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

Flood gauges on the Pequannock River
Macopin this gaugeNJ5.57.75 ft, Mar 12, 19362
RiverdaleNJ8.013.60 ft, Apr 5, 19842

Other gauges in Passaic County

Flood gauges in Passaic County
N. Haledon6.010.93 ft, May 16, 19902
Beatties Dam11.314.10 ft, Aug 30, 20110
Clifton (Dundee Dam)4.58.40 ft, Oct 10, 19031
Little Falls7.014.19 ft, Aug 30, 201122
Singac8.512.44 ft, Dec 20, 20231
Riverdale8.013.60 ft, Apr 5, 19842
Pompton Plains16.025.24 ft, Aug 29, 201116
Pompton Lakes11.522.62 ft, Aug 29, 20119
Wanaque6.010.82 ft, Apr 5, 19842

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

NOAA National Water Prediction Service, gauge MCPN4, 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.