Snake River at McDuff Rapids at China Garden ID: flow right now vs. normal
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—flow right now
—of typical for this month
—gage height
The Snake River at McDuff Rapids at China Garden ID gauge has averaged 26,827 cfs over 23 years of monthly records. Flow is usually highest in May (58,730 cfs) and lowest in November (14,280 cfs).
Typical flow by month
Highest in May (58,730 cfs), lowest in November (14,280 cfs).
Key figures
- Average flow
- 26,827 cfs
- Highest peak on record
- 148,000 cfs
- Year of that peak
- 2010
- Drainage area
- —
- Years of records
- 23
- Gauge elevation
- 845 ft
- River
- Snake River
- County
- Nez Perce
- State
- Idaho
Monthly numbers
| Month | Average | Median | Lowest | Highest |
|---|---|---|---|---|
| Jan | 19,896 cfs | 19,200 cfs | 14,400 cfs | 30,900 cfs |
| Feb | 21,852 cfs | 20,200 cfs | 13,250 cfs | 38,950 cfs |
| Mar | 28,074 cfs | 22,500 cfs | 15,700 cfs | 83,600 cfs |
| Apr | 41,604 cfs | 34,900 cfs | 18,850 cfs | 90,550 cfs |
| May | 58,730 cfs | 54,000 cfs | 36,000 cfs | 103,000 cfs |
| Jun | 50,446 cfs | 44,350 cfs | 23,300 cfs | 113,000 cfs |
| Jul | 24,183 cfs | 22,900 cfs | 15,700 cfs | 53,000 cfs |
| Aug | 15,635 cfs | 15,500 cfs | 11,800 cfs | 23,100 cfs |
| Sep | 16,123 cfs | 15,950 cfs | 12,450 cfs | 29,200 cfs |
| Oct | 14,439 cfs | 14,100 cfs | 11,900 cfs | 21,000 cfs |
| Nov | 14,280 cfs | 14,200 cfs | 12,000 cfs | 19,350 cfs |
| Dec | 16,713 cfs | 16,100 cfs | 12,400 cfs | 25,000 cfs |
Monthly averages of daily flow over the gauge's record. Lowest and highest are the extreme monthly averages for that month.
How Snake River at McDuff Rapids at China Garden ID compares in Idaho
- Snake River at McDuff Rapids at China Garden ID ranks #1 of 187 gauges in Idaho in this dataset by average flow.
- That places it in the top 1% in Idaho by average flow.
- The median average flow of gauges in Idaho is 299 cfs.
- Among all 2,293 gauges in the dataset, Snake River at McDuff Rapids at China Garden ID ranks #20 by average flow.
Data: U.S. Geological Survey (USGS) (public domain, U.S. federal data).· Updated 2026-11-02 · Text generated from the data and checked against it.
Live values are provisional USGS data. Measurements only, not a safety assessment — for flood warnings see the National Weather Service. Official page: USGS 13317660.