Black River below Dadville

Highest listed crest 26.39 ftFlood stage 22.0 ft13 crests since 1984

The Black River below Dadville crested at major flood stage 2 times among the 13 crests the National Weather Service lists from 1984 to 2026. The highest, 26.39 ft on January 9, 1998, was major flooding, 4.39 feet above flood stage. 2 other gauges on the Black River crested above flood stage within a week of it, 1 at its own highest listed crest.

The gauge

Highest listed crest: 26.39 ft; January 9, 1998
Flood stage: 22.0 ft; Major flooding from 25.0 ft
Crests at major: 2; 68th of 160 gauges in New York
Most recent flood crest: April 2, 2026; 22.24 ft, minor flooding
Location: Lewis County; New York
Identifiers: NWS DADN6; USGS 04256059; out of service

Flood stages

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

Flood categories, Black River below Dadville

Action stage	20.0	6	Feb 23, 2018	The level at which the NWS or its partners begin to take action
Flood stage (minor)	22.0	2	Apr 2, 2026	Minimal or no property damage, but possibly some public threat
Moderate flood stage	24.0	2	Apr 12, 1993	Some inundation of structures and roads near the stream
Major flood stage	25.0	2	Apr 16, 2014	Extensive inundation of structures and roads

Every listed crest

13 crests from 1984 to 2026. 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, Black River below Dadville

1	Jan 9, 1998	26.39	+4.39	Major	—
2	Apr 16, 2014	25.69	+3.69	Major	—
3	Apr 12, 1993	24.99	+2.99	Moderate	—
4	Dec 31, 1984	24.29	+2.29	Moderate	—
5	Jan 14, 2018	23.59	+1.59	Minor	—
6	Apr 2, 2026	22.24	+0.24	Minor	24,785
7	Apr 8, 2017	21.65	−0.35	Action	—
8	Feb 27, 2017	21.41	−0.59	Action	—
9	Nov 1, 2017	21.17	−0.83	Action	—
10	Feb 23, 2018	20.91	−1.09	Action	—
11	Mar 3, 2017	20.67	−1.33	Action	—
12	Feb 27, 2016	20.65	−1.35	Action	—
13	Apr 27, 2018	19.87	−2.13	Below flood stage	—

The worst floods along the Black River

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

January 9, 1998: 26.39 ft here, major flooding

WatertownNY · Jan 10, 1998 · 16.02 ft · Major · its highest
BoonvilleNY · Jan 9, 1998 · 11.25 ft · Moderate

April 16, 2014: 25.69 ft here, major flooding

WatertownNY · Apr 17, 2014 · 13.81 ft · Moderate
BoonvilleNY · Apr 16, 2014 · 10.61 ft · Minor

April 12, 1993: 24.99 ft here, moderate flooding

WatertownNY · Apr 12, 1993 · 14.20 ft · Major
BoonvilleNY · Apr 11, 1993 · 10.79 ft · Minor

Gauges on the Black River

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

Flood gauges on the Black River

Boonville	NY	10.0	12.50 ft, Mar 28, 1913	1
Dadville this gauge	NY	22.0	26.39 ft, Jan 9, 1998	2
Watertown	NY	10.0	16.02 ft, Jan 10, 1998	2

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

NOAA National Water Prediction Service, gauge DADN6, 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.