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Great Miami River at Hamilton

Highest listed crest 76.60 ftFlood stage 75.0 ft18 crests since 1929

The Great Miami River at Hamilton crested above flood stage 8 times among the 18 crests the National Weather Service lists from 1929 to 2025. The highest, 76.60 ft on March 19, 1943, was minor flooding, 1.60 feet above flood stage. 2 other gauges on the Great Miami River crested above flood stage within a week of it.

The gauge

Highest listed crest
76.60 ft
March 19, 1943; 78,800 cubic feet per second
Flood stage
75.0 ft
Major flooding from 89.5 ft
Crests at major
0
8 above flood stage
Most recent flood crest
March 19, 2008
75.15 ft, minor flooding
Location
Butler County
Near Hamilton (0.4 mi), Fairfield (4.4 mi), Forest Park (7.7 mi)

Flood stages

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

Flood categories, Great Miami River at Hamilton
Action stage73.07Apr 5, 2025The level at which the NWS or its partners begin to take action
Flood stage (minor)75.08Mar 19, 2008Minimal or no property damage, but possibly some public threat
Moderate flood stage82.00—Some inundation of structures and roads near the stream
Major flood stage89.50—Extensive inundation of structures and roads

Every listed crest

18 crests from 1929 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Great Miami River at Hamilton, 1929 to 2025 7075808590ft Flood stage 75.0 ftMajor 89.5 ft Feb 26, 1929: 76.50 ft, minor flooding; 70,300 cubic feet per secondJan 22, 1937: 76.33 ft, minor flooding; 73,900 cubic feet per secondMar 19, 1943: 76.60 ft, minor flooding; 78,800 cubic feet per secondJan 6, 1945: 74.50 ft, action stageJan 6, 1949: 74.50 ft, action stageJan 24, 1949: 72.65 ft, below flood stage; 42,200 cubic feet per secondJan 27, 1952: 75.95 ft, minor flooding; 71,600 cubic feet per secondMay 8, 1961: 73.42 ft, action stage; 57,600 cubic feet per secondMar 5, 1963: 74.96 ft, action stage; 66,600 cubic feet per secondMay 24, 1968: 75.41 ft, minor flooding; 69,300 cubic feet per secondJan 31, 1982: 73.75 ft, action stage; 58,100 cubic feet per secondAug 10, 1995: 72.10 ft, below flood stageApr 29, 1996: 74.26 ft, action stage; 63,800 cubic feet per secondJan 5, 2004: 75.84 ft, minor flooding; 73,500 cubic feet per secondJan 6, 2005: 75.57 ft, minor flooding; 71,500 cubic feet per secondJan 14, 2005: 72.87 ft, below flood stageMar 19, 2008: 75.15 ft, minor flooding; 67,535 cubic feet per secondApr 5, 2025: 73.53 ft, action stage Highest, 76.60 ft, Mar 19, 1943 19401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Great Miami River at Hamilton 1920s: 1 1930s: 1 1940s: 1 1950s: 1 1960s: 1 1970s: 0 1980s: 0 1990s: 0 2000s: 3 3 2010s: 0 2020s: 0 1920s1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s
  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. 1 crest measured on an earlier gauge datum is left out: 79.20 ft on Jan 21, 1959.

Highest crests

Highest listed crests, Great Miami River at Hamilton
1Mar 19, 194376.60+1.60Minor78,800
2Feb 26, 192976.50+1.50Minor70,300
3Jan 22, 193776.33+1.33Minor73,900
4Jan 27, 195275.95+0.95Minor71,600
5Jan 5, 200475.84+0.84Minor73,500
6Jan 6, 200575.57+0.57Minor71,500
7May 24, 196875.41+0.41Minor69,300
8Mar 19, 200875.15+0.15Minor67,535
9Mar 5, 196374.96−0.04Action66,600
10Jan 6, 194574.50−0.50Action—
11Jan 6, 194974.50−0.50Action—
12Apr 29, 199674.26−0.74Action63,800
13Jan 31, 198273.75−1.25Action58,100
14Apr 5, 202573.53−1.47Action—
15May 8, 196173.42−1.58Action57,600
16Jan 14, 200572.87−2.13Below flood stage—
17Jan 24, 194972.65−2.35Below flood stage42,200
18Aug 10, 199572.10−2.90Below flood stage—

The worst floods along the Great Miami River

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

March 19, 1943: 76.60 ft here, minor flooding

  • TaylorsvilleOH · Mar 20, 1943 · 22.70 ft · Minor
  • SidneyOH · Mar 19, 1943 · 12.00 ft · Minor

February 26, 1929: 76.50 ft here, minor flooding

  • TaylorsvilleOH · Feb 26, 1929 · 26.60 ft · Minor
  • MiamisburgOH · Feb 27, 1929 · 16.50 ft · Minor
  • SidneyOH · Feb 26, 1929 · 13.60 ft · Minor

January 22, 1937: 76.33 ft here, minor flooding

  • TaylorsvilleOH · Jan 21, 1937 · 26.40 ft · Minor
  • FranklinOH · Jan 22, 1937 · 16.70 ft · Minor
  • MiddletownOH · Jan 25, 1937 · 15.80 ft · Minor
  • SidneyOH · Jan 15, 1937 · 12.38 ft · Minor

Gauges on the Great Miami River

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

Flood gauges on the Great Miami River
SidneyOH10.019.60 ft, Mar 25, 19131
PiquaOH14.014.91 ft, Dec 22, 20130
TroyOH12.013.14 ft, Apr 6, 20250
TaylorsvilleOH22.031.50 ft, Jan 21, 19590
MiamisburgOH16.020.65 ft, Jan 21, 19590
FranklinOH14.017.60 ft, Jan 22, 19590
MiddletownOH12.019.20 ft, Jan 22, 19590
Hamilton this gaugeOH75.076.60 ft, Mar 19, 19430
MiamitownOH16.033.40 ft, Jan 29, 19591

Other gauges in Butler County

Flood gauges in Butler County
Middletown12.019.20 ft, Jan 22, 19590

Butler County: every hazard · River floods across the country · Ohio

NOAA National Water Prediction Service, gauge HAMO1, 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.