USGS Streamgage 13075910
Portneuf River near Tyhee, ID
Portneuf River near Tyhee, ID is USGS streamgage 13075910 in Idaho, monitoring river discharge in hydrologic subbasin 17040208. It drains a watershed of about 1,305 square miles. Discharge records at this site go back to 1985. Typical flow runs near 163.9 cfs in July and 577.1 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Idaho
- Drainage area
- 1,305 sq mi
- Subbasin (HUC-8)
- 17040208
- Coordinates
- 42.94472, -112.54444
- USGS site number
- 13075910
- Records begin
- 1985-05-01 (41 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 41 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 | 372.1 | 440.9 | 575.5 | |
| February | 374.1 | 465.9 | 672.8 | |
| March | 417 | 545.7 | 769.5 | |
| April | 383.8 | 577.1 | 1,103.2 | |
| May | 155.7 | 401.3 | 1,180.2 | |
| June | 76.9 | 195.2 | 686.2 | |
| July | 98.5 | 163.9 | 263.2 | |
| August | 149 | 211.3 | 311.2 | |
| September | 191.8 | 268.1 | 414.6 | |
| October | 317 | 413.9 | 536.1 | |
| November | 376.2 | 445.9 | 547.3 | |
| December | 374.9 | 446.5 | 550 |
All values in cubic feet per second (cfs).