Great Miami River Flow
As of 2026-07-24, the Great Miami River is flowing at a combined 7,273 cfs across 11 USGS streamgauges — 68% of normal for this time of year, versus a seasonal average of 10,639 cfs.
Total streamflow across the Great Miami River was last observed at 7,273 cfs, and is expected to yield approximately 14,425 acre-ft of water today; about 68% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 10,639 cfs, with recent peaks last observed on 2025-04-07 when daily discharge volume was observed at 288,830 cfs.
Maximum discharge along the river is currently at the Great Miami River Below Miamisburg Oh reporting a streamflow rate of 5,170 cfs. However, the streamgauge with the highest stage along the river is the Great Miami River At Hamilton Oh with a gauge stage of 63.12 ft. This river is monitored from 11 different streamgauging stations along the Great Miami River, the highest being situated at an altitude of 978 ft, the Great Miami River Bl Indian Lake At Russells Pt Oh.
River streamflow levels
Daily aggregate streamflow across every monitored gauge along the Great Miami River. Use the range buttons to zoom in on a specific period.
Total streamflow
Sum of all monitored streamgauges · daily
Every streamgauge along the Great Miami River
All 11 USGS gauges Snoflo tracks for this river, with current flow, stage, recent change, percent of normal, and the gauge's all-time min / max. Click any header to sort. Cells are heatmapped relative to the column min/max -- darker blue = higher.
| Streamgauge▾ | Streamflow (cfs)▾ | Gauge stage (ft)▾ | 24h Δ (%)▾ | % Normal▾ | Min (cfs)▾ | Max (cfs)▾ | Elevation (ft)▾ |
|---|---|---|---|---|---|---|---|
|
Great Miami River Bl Indian Lake At Russells Pt Oh
OH
USGS 03260502
|
77 | 1.56 | · | · | · | · | 978 |
|
Great Miami River At Sidney Oh
OH
USGS 03261500
|
89 | 0.97 | -20.0 | 59% | 40 | 11,300 | 926 |
|
Great Miami River At Piqua Oh
OH
USGS 03262500
|
196 | 1.34 | -19.0 | 74% | 36 | 19,900 | 846 |
|
Great Miami River At Troy Oh
OH
USGS 03262700
|
312 | 2.64 | -6.0 | 95% | 23 | 22,300 | 813 |
|
Great Miami River At Taylorsville Oh
OH
USGS 03263000
|
413 | 2.02 | -6.4 | 106% | 74 | 27,100 | 779 |
|
Great Miami River At Dayton Oh
OH
USGS 03270500
|
986 | 24.39 | -12.7 | 91% | 198 | 41,200 | 728 |
|
Great Miami River At Miamisburg Oh
OH
USGS 03271500
|
997 | 4.11 | -16.9 | 84% | 427 | 41,100 | 689 |
|
Great Miami River Below Miamisburg Oh
OH
USGS 03271601
|
5,170 | 9.28 | · | · | · | · | 683 |
|
Great Miami River At Franklin Oh
OH
USGS 03271620
|
1,280 | 1.05 | -14.1 | 95% | 359 | 42,000 | 660 |
|
Great Miami River At Middletown Oh
OH
USGS 03272100
|
1,470 | 2.47 | -13.5 | 83% | 292 | 55,100 | 650 |
|
Great Miami River At Hamilton Oh
OH
USGS 03274000
|
1,530 | 63.12 | -8.9 | 85% | 454 | 63,400 | 562 |
Maximum streamflow discharge by year
The single highest aggregate discharge recorded each year. Spotting the multi-year trend reveals droughts vs. wet cycles long before the headline daily flow does.
Annual peak discharge
From the river's full record · one point per water year
Streamflow elevation profile
Each bubble is one gauge along the river, plotted by current streamflow (x-axis) vs elevation (y-axis), sized by gauge stage. Reading top-to-bottom traces the river from headwaters down to its mouth -- you can see flow accumulate as elevation drops.
Elevation vs streamflow
One point per monitored gauge · bubble size = gauge stage
Great Miami River
The Great Miami River is a 160-mile-long river located in southwestern Ohio. The river played a significant role in the area's history, serving as a transportation route for Native Americans and European settlers. It flows through several major cities, including Dayton and Hamilton, before emptying into the Ohio River. The river's hydrology has been altered by several dams and reservoirs, including the Indian Lake Dam and the Taylorsville Dam. These structures were built to control flooding, provide water for irrigation, and generate hydroelectric power. The Great Miami River is also a popular recreational destination, offering opportunities for boating, fishing, and hiking. Many agricultural communities rely on the river for irrigation, and several conservation efforts have been implemented to protect the river's ecosystem.
Recreation along the Great Miami River
Fishing access and paddle runs Snoflo tracks within the watershed.
Track the Great Miami River in the Snoflo app
Set per-gauge push alerts (e.g. "alert me when flow at the Russian R Nr Healdsburg crosses 5,000 cfs"), and Snoflo's iOS app pushes the moment USGS reports the crossing.
About the Great Miami River
How is the Great Miami River flowing right now?
As of 2026-07-24, the Great Miami River is flowing at a combined 7,273 cfs across its USGS streamgauges, about 68% of normal for this date. The live per-gauge breakdown and 24-hour trend are shown above.
Is the Great Miami River running high or low right now?
Check the percent-of-normal figure on this page: above 100% means the river is running higher than its seasonal average for the date, below 100% means lower. The per-gauge table shows which reaches are highest and lowest.
Where does the data for the Great Miami River come from?
Streamflow and gauge stage data are sourced from the U.S. Geological Survey (USGS) National Water Information System. The aggregate flow shown at the top of the page is computed by Snoflo as the sum of all monitored gauges along the river.
How is "percent of normal" calculated?
Today's aggregate streamflow is compared to the historical average aggregate streamflow on this calendar day across the river's full record. 100% means right on average; values above 100% indicate above-normal flow (wet year); values below indicate below-normal (dry year or drought).
Why are some gauges showing very different flows?
Gauges along a river measure flow at different points: headwater gauges read what's coming off the snowpack or mountain runoff; downstream gauges integrate everything upstream, including tributary inputs. Wide spreads usually mean a tributary is contributing significantly between gauges.
What's the elevation profile chart showing?
Each bubble is one gauge along the river, plotted by streamflow (x-axis) and elevation (y-axis), sized by gauge stage. Reading top-down traces the river from headwaters to mouth -- you can see flow build as elevation drops.
Can I get alerts when a specific gauge crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app on a per-gauge basis. Open any individual streamgauge from the table above and favorite it to set a discharge threshold.