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Delaware River at Tocks Island

Highest listed crest 37.40 ftFlood stage 21.0 ft14 crests since 1955

The Delaware River at Tocks Island crested at major flood stage 5 times among the 14 crests the National Weather Service lists from 1955 to 2018. The highest, 37.40 ft on August 19, 1955, was major flooding, 16.40 feet above flood stage. 12 other gauges on the Delaware River crested above flood stage within a week of it, 8 at their own highest listed crest.

The gauge

Highest listed crest
37.40 ft
August 19, 1955; 260,000 cubic feet per second
Flood stage
21.0 ft
Major flooding from 25.0 ft
Crests at major
5
23rd of 125 gauges in New Jersey
Most recent flood crest
September 9, 2011
24.95 ft, moderate flooding
Location
Warren County
New Jersey

Flood stages

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

Flood categories, Delaware River at Tocks Island
Action stage20.02Jan 25, 2018The level at which the NWS or its partners begin to take action
Flood stage (minor)21.02Mar 12, 2011Minimal or no property damage, but possibly some public threat
Moderate flood stage23.04Sep 9, 2011Some inundation of structures and roads near the stream
Major flood stage25.05Jun 28, 2006Extensive inundation of structures and roads

Every listed crest

14 crests from 1955 to 2018. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Delaware River at Tocks Island, 1955 to 2018 152025303540ft Flood stage 21.0 ftMajor 25.0 ft Aug 19, 1955: 37.40 ft, major flooding; 260,000 cubic feet per secondJun 24, 1972: 17.31 ft, below flood stageJun 30, 1973: 23.82 ft, moderate flooding; 109,000 cubic feet per secondMay 30, 1984: 21.77 ft, minor flooding; 97,000 cubic feet per secondMar 16, 1986: 24.00 ft, moderate flooding; 110,000 cubic feet per secondJan 20, 1996: 28.40 ft, major flooding; 155,000 cubic feet per secondSep 19, 2004: 30.34 ft, major flooding; 176,000 cubic feet per secondApr 3, 2005: 33.24 ft, major flooding; 215,000 cubic feet per secondJun 28, 2006: 33.87 ft, major flooding; 225,000 cubic feet per secondMar 7, 2011: 20.54 ft, action stage; 88,072 cubic feet per secondMar 12, 2011: 22.88 ft, minor flooding; 104,520 cubic feet per secondAug 29, 2011: 23.21 ft, moderate floodingSep 9, 2011: 24.95 ft, moderate flooding; 128,000 cubic feet per secondJan 25, 2018: 20.08 ft, action stage Highest, 37.40 ft, Aug 19, 1955 196019701980199020002010

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Delaware River at Tocks Island 1950s: 1 1960s: 0 1970s: 1 1980s: 2 1990s: 1 2000s: 3 3 2010s: 3 1950s1960s1970s1980s1990s2000s2010s
  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, Delaware River at Tocks Island
1Aug 19, 195537.40+16.40Major260,000
2Jun 28, 200633.87+12.87Major225,000
3Apr 3, 200533.24+12.24Major215,000
4Sep 19, 200430.34+9.34Major176,000
5Jan 20, 199628.40+7.40Major155,000
6Sep 9, 201124.95+3.95Moderate128,000
7Mar 16, 198624.00+3.00Moderate110,000
8Jun 30, 197323.82+2.82Moderate109,000
9Aug 29, 201123.21+2.21Moderate—
10Mar 12, 201122.88+1.88Minor104,520
11May 30, 198421.77+0.77Minor97,000
12Mar 7, 201120.54−0.46Action88,072
13Jan 25, 201820.08−0.92Action—
14Jun 24, 197217.31−3.69Below flood stage—

The worst floods along the Delaware River

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

August 19, 1955: 37.40 ft here, major flooding

  • EastonPA · Aug 19, 1955 · 44.40 ft · Major · its highest
  • RiegelsvilleNJ · Aug 20, 1955 · 38.85 ft · Major · its highest
  • MontaguePA · Aug 19, 1955 · 35.15 ft · Major · its highest
  • StocktonPA · Aug 20, 1955 · 30.44 ft · Major · its highest
  • BelvidereNJ · Aug 19, 1955 · 30.21 ft · Major · its highest
  • TrentonNJ · Aug 20, 1955 · 28.60 ft · Major
  • FrenchtownNJ · Aug 20, 1955 · 27.79 ft · Major · its highest
  • Washington CrossingPA · Aug 20, 1955 · 27.77 ft · Major · its highest
  • BarryvilleNY · Aug 19, 1955 · 26.40 ft · Major
  • New Hope-Lambertville BridgePA · Aug 20, 1955 · 24.16 ft · Major · its highest

June 28, 2006: 33.87 ft here, major flooding

  • EastonPA · Jun 29, 2006 · 37.09 ft · Major
  • RiegelsvilleNJ · Jun 29, 2006 · 33.62 ft · Major
  • MontaguePA · Jun 29, 2006 · 32.16 ft · Major
  • BarryvilleNY · Jun 28, 2006 · 28.97 ft · Major · its highest
  • LordvillePA · Jun 28, 2006 · 28.87 ft · Major · its highest
  • BelvidereNJ · Jun 29, 2006 · 27.16 ft · Major
  • StocktonPA · Jun 29, 2006 · 25.39 ft · Major
  • TrentonNJ · Jun 29, 2006 · 25.09 ft · Major
  • FrenchtownNJ · Jun 29, 2006 · 23.40 ft · Major
  • Washington CrossingPA · Jun 29, 2006 · 22.54 ft · Major

April 3, 2005: 33.24 ft here, major flooding

Gauges on the Delaware River

Flood gauges sharing the river's name, linked within 80 miles of one another.

Flood gauges on the Delaware River
BarryvilleNY17.028.97 ft, Jun 28, 20062
BelvidereNJ22.030.21 ft, Aug 19, 19555
Bridesburg (IN MLLW)PA8.510.99 ft, Jan 10, 20242
Burlington (IN MLLW)PA9.311.99 ft, Jan 10, 20247
CallicoonPA12.020.38 ft, Jun 28, 20065
Delaware City (IN MLLW)DE7.59.73 ft, Oct 30, 20122
EastonPA22.044.40 ft, Aug 19, 19557
FrenchtownNJ16.027.79 ft, Aug 20, 19557
LordvillePA20.028.87 ft, Jun 28, 20061
Marcus Hook (IN MLLW)PA7.710.14 ft, Oct 30, 20124
Matamoras/Port JervisPA18.026.60 ft, Feb 12, 19814
MontaguePA25.035.15 ft, Aug 19, 19554
New Hope-Lambertville BridgePA13.024.16 ft, Aug 20, 19558
Newbold Island (IN MLLW)PA10.213.22 ft, Sep 1, 20217
RiegelsvilleNJ22.038.85 ft, Aug 20, 19556
StocktonPA18.030.44 ft, Aug 20, 19555
Tocks Island this gaugeNJ21.037.40 ft, Aug 19, 19555
TrentonNJ20.030.60 ft, Mar 8, 19045
USCG Station Washington Street (IN MLLW)PA8.210.66 ft, Jan 10, 20246
Washington CrossingPA16.027.77 ft, Aug 20, 19554

Other gauges in Warren County

Flood gauges in Warren County
Belvidere4.56.33 ft, Aug 28, 20110
Belvidere22.030.21 ft, Aug 19, 19555
Riegelsville22.038.85 ft, Aug 20, 19556
Bloomsbury6.09.20 ft, Sep 2, 20210
Blairstown5.011.12 ft, Aug 19, 19550
Pequest6.06.42 ft, Sep 8, 20110

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

NOAA National Water Prediction Service, gauge TKSN4, 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.