USGS Streamgage 13069500
Snake River near Blackfoot, ID
Snake River near Blackfoot, ID is USGS streamgage 13069500 in Idaho, monitoring river discharge in hydrologic subbasin 17040206. It drains a watershed of about 11,310 square miles. Discharge records at this site go back to 1910. Typical flow runs near 3,073.2 cfs in July and 5,022 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Idaho
- Drainage area
- 11,310 sq mi
- Subbasin (HUC-8)
- 17040206
- Coordinates
- 43.12528, -112.51889
- USGS site number
- 13069500
- Records begin
- 1910-06-06 (116 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 116 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 | 1,503.9 | 2,521 | 5,056.1 | |
| February | 1,680.3 | 2,784.5 | 5,475.9 | |
| March | 1,801.6 | 3,059 | 7,929 | |
| April | 1,807 | 5,022 | 14,543.3 | |
| May | 1,841.6 | 8,457.7 | 19,567.7 | |
| June | 1,928 | 8,244.7 | 21,170 | |
| July | 786.3 | 3,073.2 | 10,910 | |
| August | 584.9 | 2,154.2 | 5,699.7 | |
| September | 440.1 | 1,972 | 4,804.7 | |
| October | 945.3 | 2,475.5 | 5,011.6 | |
| November | 1,986 | 3,176 | 5,517 | |
| December | 1,714.8 | 2,914.2 | 5,251.6 |
All values in cubic feet per second (cfs).