USGS Streamgage 13290450
Snake River at Hells Canyon Dam Id-Or State Line
Snake River at Hells Canyon Dam Id-Or State Line is USGS streamgage 13290450 in Oregon, monitoring river discharge in hydrologic subbasin 17060101. It drains a watershed of about 73,300 square miles. Discharge records at this site go back to 1965. Typical flow runs near 13,041.9 cfs in July and 22,360 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Oregon
- Drainage area
- 73,300 sq mi
- Subbasin (HUC-8)
- 17060101
- Coordinates
- 45.25444, -116.69694
- USGS site number
- 13290450
- Records begin
- 1965-07-15 (61 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 60 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 11,128.7 | 17,577.4 | 29,635.5 | |
| February | 10,729.3 | 18,862.1 | 36,103.4 | |
| March | 10,618.4 | 20,041.9 | 53,267.7 | |
| April | 9,211.7 | 22,360 | 57,440 | |
| May | 8,861.9 | 20,867.7 | 48,045.2 | |
| June | 8,458.7 | 19,183.3 | 42,550 | |
| July | 7,854.5 | 13,041.9 | 23,209.7 | |
| August | 7,848.4 | 10,645.2 | 16,035.5 | |
| September | 8,531.7 | 12,693.3 | 19,010 | |
| October | 8,860 | 11,546.5 | 21,025.8 | |
| November | 8,561.3 | 9,823.7 | 21,913.3 | |
| December | 9,105.8 | 13,747.7 | 24,941.9 |
All values in cubic feet per second (cfs).