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West Branch Delaware River at Cannonsville Reservoir

Highest listed crest 1,158.00 ftFlood stage 1,153.0 ft24 crests since 1986

The West Branch Delaware River at Cannonsville Reservoir crested at major flood stage 3 times among the 24 crests the National Weather Service lists from 1986 to 2025. The highest, 1,158.00 ft on June 29, 2006, was major flooding, 5.00 feet above flood stage. 2 other gauges on the West Branch Delaware River crested above flood stage within a week of it, 1 at its own highest listed crest.

The gauge

Highest listed crest
1,158.00 ft
June 29, 2006
Flood stage
1,153.0 ft
Major flooding from 1,156.0 ft
Crests at major
3
50th of 160 gauges in New York
Most recent flood crest
May 10, 2025
1,153.42 ft, minor flooding
Location
Delaware County
New York
Identifiers
NWS CNNN6
No USGS station

Flood stages

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

Flood categories, West Branch Delaware River at Cannonsville Reservoir
Action stage1,150.00—The level at which the NWS or its partners begin to take action
Flood stage (minor)1,153.011May 10, 2025Minimal or no property damage, but possibly some public threat
Moderate flood stage1,154.010Apr 9, 2022Some inundation of structures and roads near the stream
Major flood stage1,156.03Jun 29, 2006Extensive inundation of structures and roads

Every listed crest

24 crests from 1986 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the West Branch Delaware River at Cannonsville Reservoir, 1986 to 2025 115311541155115611571158ft Flood stage 1,153.0 ftMajor 1,156.0 ft Mar 16, 1986: 1,156.73 ft, major floodingJan 28, 1996: 1,153.15 ft, minor floodingMay 13, 1996: 1,153.51 ft, minor floodingNov 10, 1996: 1,154.84 ft, moderate floodingDec 3, 1996: 1,154.50 ft, moderate floodingMar 11, 1998: 1,153.13 ft, minor floodingApr 11, 2001: 1,154.18 ft, moderate floodingMar 23, 2003: 1,154.89 ft, moderate floodingOct 31, 2003: 1,153.51 ft, minor floodingNov 22, 2003: 1,153.76 ft, minor floodingDec 26, 2003: 1,153.40 ft, minor floodingSep 19, 2004: 1,155.24 ft, moderate floodingJan 16, 2005: 1,154.89 ft, moderate floodingApr 4, 2005: 1,156.78 ft, major floodingJan 19, 2006: 1,154.08 ft, moderate floodingJun 29, 2006: 1,158.00 ft, major floodingMar 28, 2007: 1,153.67 ft, minor floodingApr 20, 2007: 1,153.44 ft, minor floodingMar 10, 2008: 1,154.68 ft, moderate floodingMar 12, 2011: 1,154.08 ft, moderate floodingApr 29, 2011: 1,153.52 ft, minor floodingApr 8, 2017: 1,153.13 ft, minor flooding; 4,505 cubic feet per secondApr 9, 2022: 1,154.98 ft, moderate flooding; 9,453 cubic feet per secondMay 10, 2025: 1,153.42 ft, minor flooding; 5,187 cubic feet per second Highest, 1,158.00 ft, Jun 29, 2006 1990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, West Branch Delaware River at Cannonsville Reservoir 1980s: 1 1990s: 5 2000s: 13 13 2010s: 3 2020s: 2 1980s1990s2000s2010s2020s
  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, West Branch Delaware River at Cannonsville Reservoir
1Jun 29, 20061,158.00+5.00Major—
2Apr 4, 20051,156.78+3.78Major—
3Mar 16, 19861,156.73+3.73Major—
4Sep 19, 20041,155.24+2.24Moderate—
5Apr 9, 20221,154.98+1.98Moderate9,453
6Mar 23, 20031,154.89+1.89Moderate—
7Jan 16, 20051,154.89+1.89Moderate—
8Nov 10, 19961,154.84+1.84Moderate—
9Mar 10, 20081,154.68+1.68Moderate—
10Dec 3, 19961,154.50+1.50Moderate—
11Apr 11, 20011,154.18+1.18Moderate—
12Jan 19, 20061,154.08+1.08Moderate—
13Mar 12, 20111,154.08+1.08Moderate—
14Nov 22, 20031,153.76+0.76Minor—
15Mar 28, 20071,153.67+0.67Minor—
16Apr 29, 20111,153.52+0.52Minor—
17May 13, 19961,153.51+0.51Minor—
18Oct 31, 20031,153.51+0.51Minor—
19Apr 20, 20071,153.44+0.44Minor—
20May 10, 20251,153.42+0.42Minor5,187
21Dec 26, 20031,153.40+0.40Minor—
22Jan 28, 19961,153.15+0.15Minor—
23Mar 11, 19981,153.13+0.13Minor—
24Apr 8, 20171,153.13+0.13Minor4,505

The worst floods along the West Branch Delaware River

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

June 29, 2006: 1,158.00 ft here, major flooding

  • Hale EddyNY · Jun 28, 2006 · 19.10 ft · Major
  • WaltonNY · Jun 28, 2006 · 16.85 ft · Major · its highest

April 4, 2005: 1,156.78 ft here, major flooding

  • WaltonNY · Apr 3, 2005 · 14.45 ft · Moderate
  • Hale EddyNY · Apr 3, 2005 · 14.12 ft · Moderate
  • DelhiNY · Apr 3, 2005 · 10.26 ft · Moderate

March 16, 1986: 1,156.73 ft here, major flooding

  • WaltonNY · Mar 15, 1986 · 14.84 ft · Moderate
  • Hale EddyNY · Mar 15, 1986 · 13.63 ft · Moderate

Gauges on the West Branch Delaware River

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

Flood gauges on the West Branch Delaware River
DelhiNY8.012.53 ft, Aug 29, 20115
Cannonsville Reservoir this gaugeNY1,153.01,158.00 ft, Jun 29, 20063
Hale EddyNY11.020.30 ft, Oct 10, 19039
WaltonNY11.516.85 ft, Jun 28, 20062

Other gauges in Delaware County

Flood gauges in Delaware County
Cooks Falls10.020.55 ft, Jun 28, 20062
Arkville10.515.50 ft, Jan 19, 19965
Downsville below Pepacton Dam9.016.00 ft, Oct 9, 19037
Fishs Eddy13.021.45 ft, Jun 28, 20063
Harvard10.016.93 ft, Sep 22, 19388
Margaretville11.015.97 ft, Aug 28, 20113
Pepacton Reservoir1,281.01,283.74 ft, Jun 28, 20060
Hancock18.028.23 ft, Jun 28, 20063
East Sidney Dam1,203.01,204.35 ft, Jul 1, 20060
East Sidney Dam4.56.19 ft, Apr 7, 19601
Dunraven7.011.20 ft, Jan 19, 19961
Sidney979.5988.30 ft, Jun 28, 20062
Andes6.86.96 ft, Aug 9, 20240
Trout Creek6.37.48 ft, Aug 9, 20243
Delhi8.012.53 ft, Aug 29, 20115
Hale Eddy11.020.30 ft, Oct 10, 19039
Walton11.516.85 ft, Jun 28, 20062

Delaware County: every hazard · River floods across the country · New York

NOAA National Water Prediction Service, gauge CNNN6, 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.