Major Flood
89.5 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
82 ft
Minor Flood
75 ft
Action Stage
73 ft
What Floods at Each Level
90 ft
Water would overtop levees on the south side of Hamilton. Water levels exceeding 90 feet would top all levees protecting the business district resulting in major flooding near the river channel through the entire city. Major flooding occurs, especially near New Miami and Ross, where homes and businesses along the river are suffering major inundation.
89 ft
This elevation is at the top of some levees protecting mainly the southern areas of Hamilton. In addition to major inundation of communities such as New Miami and near Ross, river stages above this level would inundate some areas of Hamilton south of Pershing Avenue along and near Neilan Boulevard. Widespread inundation occurs near Joyce Park and Joe Nuxhall Lane.
84 ft
Flooding worsens in lowland areas in southern Butler County between State Route 128 and the Great Miami River. Flooding also worsens along the river near Ross. The City of Hamilton itself is protected from river flooding up to 89 feet for locations in the southern part of the city, with most of the city protected at stages up to 90 feet.
82 ft
Lowland areas in southern Butler County between State Route 128 and the Great Miami River become flooded. Flooding also occurs along the river near Ross. The City of Hamilton itself is protected from river levels up to 89 feet in the southern sections of the city, while most of the city is protected up to 90 feet.
77 ft
Locations along the river mainly south of the City of Hamilton become flooded. Flooding continues to impact New Miami and Ross. Southern portions of the City of Hamilton are protected by flood walls up to 89 feet, with the majority of the city protected up to a stage of 90 feet.
75 ft
Lowland areas south of Hamilton to Ross continue to flood. Evacuations are possible near New Miami and near Ross. The City of Hamilton itself is protected from river levels up to 89 feet for locations in the southern part of the city, with most of the city protected at stages up to 90 feet.
74 ft
Lowland flooding begins about one mile north of High Street in Hamilton and near Ross, about five miles downstream. Low-lying homes near New Miami and other low-lying areas along the river channel are impacted. The City of Hamilton itself is protected from river levels up to 89 feet for locations in the southern part of the city, with most of the city protected at stages up to 90 feet.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Jan 20, 1959 | 79.2 ft | 108,000 cfs |
| Mar 18, 1943 | 76.6 ft | 78,800 cfs |
| Feb 25, 1929 | 76.5 ft | 70,300 cfs |
About This Gauge
USGS Site
NWS LID
HAMO1
River
Great Miami River
County
Butler, OH
Coordinates
39.3911°N, 84.5722°W
Get Flood Alerts for Great Miami River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Great Miami River at Hamilton?
The Great Miami River at Hamilton gauge is maintained by USGS (site 03274000) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Great Miami River at Hamilton?
The NWS-defined flood stage for Great Miami River at Hamilton is 75 feet. Action stage begins at 73 feet. Moderate flooding starts at 82 feet, and major flooding at 89.5 feet.
How do I get alerts when Great Miami River rises?
Download StormCast free on Google Play, go to River Gauges, and add Great Miami River at Hamilton to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Great Miami River at Hamilton gauge located?
The gauge is located in Butler County, Ohio at coordinates 39.3911°N, 84.5722°W. USGS site number: 03274000. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Great Miami River
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Source & Notes
Data provided by: Miami Conservancy District, Observations courtesy of U.S. Geological Survey, Observations courtesy of U.S. Army Corps of Engineers
- Stage may be affected by ice.
- River Forecasts typically include ONLY 2 days of future rain from <u>forecast issuance time</u> (lower right of graph). Occasionally 3 days of future rain included.