Pequannock River at Riverdale

Highest listed crest 13.60 ftFlood stage 8.0 ft11 crests since 1981

The Pequannock River at Riverdale crested at major flood stage 2 times among the 11 crests the National Weather Service lists from 1981 to 2024. The highest, 13.60 ft on April 5, 1984, was major flooding, 5.60 feet above flood stage.

The gauge

Highest listed crest: 13.60 ft; April 5, 1984; 8,000 cubic feet per second
Flood stage: 8.0 ft; Major flooding from 11.0 ft
Crests at major: 2; 49th of 125 gauges in New Jersey
Most recent flood crest: January 10, 2024; 8.55 ft, minor flooding
Location: Passaic County; Near Pompton Lakes (0.7 mi), Wanaque (3.1 mi), Oakland (3.7 mi)
Identifiers: NWS RDLN4; USGS 01382800

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 Riverdale

Action stage	7.0	1	Jul 31, 2016	The level at which the NWS or its partners begin to take action
Flood stage (minor)	8.0	5	Jan 10, 2024	Minimal or no property damage, but possibly some public threat
Moderate flood stage	10.0	0	—	Some inundation of structures and roads near the stream
Major flood stage	11.0	2	Aug 28, 2011	Extensive inundation of structures and roads

Every listed crest

11 crests from 1981 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.

Crests at or above flood stage, by decade

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.
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, Pequannock River at Riverdale

1	Apr 5, 1984	13.60	+5.60	Major	8,000
2	Aug 28, 2011	12.57	+4.57	Major	6,900
3	Dec 18, 2023	9.74	+1.74	Minor	—
4	Jan 27, 1996	9.36	+1.36	Minor	5,570
5	Sep 2, 2021	8.99	+0.99	Minor	—
6	Jan 10, 2024	8.55	+0.55	Minor	—
7	Oct 20, 1996	8.43	+0.43	Minor	4,730
8	Jul 31, 2016	7.44	−0.56	Action	2,060
9	May 12, 1981	6.49	−1.51	Below flood stage	—
10	Mar 29, 1994	6.08	−1.92	Below flood stage	1,650
11	Mar 9, 1995	5.93	−2.07	Below flood stage	1,470

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: 12.57 ft here, major flooding

MacopinNJ · Aug 28, 2011 · 7.42 ft · Moderate

December 18, 2023: 9.74 ft here, minor flooding

MacopinNJ · Dec 18, 2023 · 6.30 ft · Minor

September 2, 2021: 8.99 ft here, minor flooding

MacopinNJ · Sep 2, 2021 · 5.99 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	NJ	5.5	7.75 ft, Mar 12, 1936	2
Riverdale this gauge	NJ	8.0	13.60 ft, Apr 5, 1984	2

Other gauges in Passaic County

Flood gauges in Passaic County

N. Haledon	6.0	10.93 ft, May 16, 1990	2
Beatties Dam	11.3	14.10 ft, Aug 30, 2011	0
Clifton (Dundee Dam)	4.5	8.40 ft, Oct 10, 1903	1
Little Falls	7.0	14.19 ft, Aug 30, 2011	22
Singac	8.5	12.44 ft, Dec 20, 2023	1
Macopin	5.5	7.75 ft, Mar 12, 1936	2
Pompton Plains	16.0	25.24 ft, Aug 29, 2011	16
Pompton Lakes	11.5	22.62 ft, Aug 29, 2011	9
Wanaque	6.0	10.82 ft, Apr 5, 1984	2

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

NOAA National Water Prediction Service, gauge RDLN4, 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.