Kennebec River at Hallowell

Highest listed crest 22.49 ftFlood stage 11.0 ft5 crests since 2019

The Kennebec River at Hallowell crested at major flood stage 1 time among the 5 crests the National Weather Service lists from 2019 to 2024. The highest, 22.49 ft on December 20, 2023, was major flooding, 11.49 feet above flood stage. 4 other gauges on the Kennebec River crested above flood stage within a week of it, 1 at its own highest listed crest.

The gauge

Highest listed crest: 22.49 ft; December 20, 2023
Flood stage: 11.0 ft; Major flooding from 18.0 ft
Crests at major: 1; 16th of 55 gauges in Maine
Most recent flood crest: April 13, 2024; 13.71 ft, moderate flooding
Location: Kennebec County; Near Augusta (4.3 mi)
Identifiers: NWS HALM1; USGS 01049330

Flood stages

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

Flood categories, Kennebec River at Hallowell

Action stage	9.0	0	—	The level at which the NWS or its partners begin to take action
Flood stage (minor)	11.0	2	Dec 24, 2022	Minimal or no property damage, but possibly some public threat
Moderate flood stage	13.0	2	Apr 13, 2024	Some inundation of structures and roads near the stream
Major flood stage	18.0	1	Dec 20, 2023	Extensive inundation of structures and roads

Every listed crest

5 crests from 2019 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, Kennebec River at Hallowell

1	Dec 20, 2023	22.49	+11.49	Major	—
2	May 2, 2023	16.62	+5.62	Moderate	—
3	Apr 13, 2024	13.71	+2.71	Moderate	—
4	Apr 21, 2019	11.36	+0.36	Minor	—
5	Dec 24, 2022	11.09	+0.09	Minor	—

The worst floods along the Kennebec River

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

December 20, 2023: 22.49 ft here, major flooding

North SidneyME · Dec 19, 2023 · 32.32 ft · Major
SkowheganME · Dec 19, 2023 · 31.00 ft · Major · its highest
AugustaME · Dec 19, 2023 · 26.92 ft · Major
GardinerME · Dec 19, 2023 · 19.24 ft · Major

May 2, 2023: 16.62 ft here, moderate flooding

AugustaME · May 2, 2023 · 20.38 ft · Moderate
North SidneyME · May 2, 2023 · 24.90 ft · Minor
GardinerME · May 2, 2023 · 14.25 ft · Minor

April 13, 2024: 13.71 ft here, moderate flooding

North SidneyME · Apr 13, 2024 · 20.62 ft · Minor
AugustaME · Apr 14, 2024 · 16.76 ft · Minor

Gauges on the Kennebec River

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

Flood gauges on the Kennebec River

Augusta	ME	12.0	34.10 ft, Apr 2, 1987	3
Gardiner	ME	13.0	26.40 ft, Mar 21, 1936	3
Hallowell this gauge	ME	11.0	22.49 ft, Dec 20, 2023	1
North Sidney	ME	20.0	39.31 ft, Apr 2, 1987	2
Skowhegan	ME	15.0	31.00 ft, Dec 19, 2023	1

Other gauges in Kennebec County

Flood gauges in Kennebec County

Augusta	12.0	34.10 ft, Apr 2, 1987	3
Gardiner	13.0	26.40 ft, Mar 21, 1936	3
North Sidney	20.0	39.31 ft, Apr 2, 1987	2

Kennebec County: every hazard · River floods across the country · Maine

NOAA National Water Prediction Service, gauge HALM1, 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.