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Naugatuck River at Beacon Falls

Highest listed crest 14.36 ftFlood stage 12.0 ft6 crests since 1979

The Naugatuck River at Beacon Falls crested at major flood stage 1 time among the 6 crests the National Weather Service lists from 1979 to 2011. The highest, 14.36 ft on August 28, 2011, was major flooding, 2.36 feet above flood stage.

The gauge

Highest listed crest
14.36 ft
August 28, 2011
Flood stage
12.0 ft
Major flooding from 14.0 ft
Crests at major
1
18th of 26 gauges in Connecticut
Most recent flood crest
August 28, 2011
14.36 ft, major flooding
Location
New Haven County
Near Naugatuck (3.2 mi), Ansonia (6.8 mi), Derby (8.1 mi)

Flood stages

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

Flood categories, Naugatuck River at Beacon Falls
Action stage11.50—The level at which the NWS or its partners begin to take action
Flood stage (minor)12.04Mar 7, 2011Minimal or no property damage, but possibly some public threat
Moderate flood stage13.01Jan 25, 1979Some inundation of structures and roads near the stream
Major flood stage14.01Aug 28, 2011Extensive inundation of structures and roads

Every listed crest

6 crests from 1979 to 2011. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Naugatuck River at Beacon Falls, 1979 to 2011 1212.51313.51414.5ft Flood stage 12.0 ftMajor 14.0 ft Jan 25, 1979: 13.78 ft, moderate flooding; 18,700 cubic feet per secondJun 5, 1982: 12.95 ft, minor flooding; 15,600 cubic feet per secondApr 23, 2006: 12.21 ft, minor flooding; 13,600 cubic feet per secondApr 16, 2007: 12.10 ft, minor flooding; 13,300 cubic feet per secondMar 7, 2011: 12.60 ft, minor flooding; 14,700 cubic feet per secondAug 28, 2011: 14.36 ft, major flooding Highest, 14.36 ft, Aug 28, 2011 1980199020002010

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Naugatuck River at Beacon Falls 1970s: 1 1980s: 1 1990s: 0 2000s: 2 2 2010s: 2 1970s1980s1990s2000s2010s
  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. 3 crests measured on an earlier gauge datum are left out: 12.08 ft on Apr 7, 1924; 14.10 ft on Mar 12, 1936; 25.70 ft on Aug 19, 1955.

Highest crests

Highest listed crests, Naugatuck River at Beacon Falls
1Aug 28, 201114.36+2.36Major—
2Jan 25, 197913.78+1.78Moderate18,700
3Jun 5, 198212.95+0.95Minor15,600
4Mar 7, 201112.60+0.60Minor14,700
5Apr 23, 200612.21+0.21Minor13,600
6Apr 16, 200712.10+0.10Minor13,300

Other gauges in New Haven County

Flood gauges in New Haven County
Stevenson11.024.50 ft, Aug 19, 19559
New Haven (IN MLLW)8.710.58 ft, Sep 21, 19380
Southbury9.021.80 ft, Aug 19, 19557

New Haven County: every hazard · River floods across the country · Connecticut

NOAA National Water Prediction Service, gauge BEAC3, 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.