USGS Streamgage 13142500
Big Wood River below Magic Dam near Richfield, ID
Big Wood River below Magic Dam near Richfield, ID is USGS streamgage 13142500 in Idaho, monitoring river discharge in hydrologic subbasin 17040219. It drains a watershed of about 1,611 square miles. Discharge records at this site go back to 1911. Typical flow runs near 894.6 cfs in July and 96.8 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Idaho
- Drainage area
- 1,611 sq mi
- Subbasin (HUC-8)
- 17040219
- Coordinates
- 43.24806, -114.35667
- USGS site number
- 13142500
- Records begin
- 1911-04-19 (115 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 115 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 | 1.8 | 7.4 | 35.6 | |
| February | 2.1 | 8.2 | 122.9 | |
| March | 2.9 | 9.4 | 701.6 | |
| April | 4.4 | 96.8 | 2,035 | |
| May | 392.2 | 857.8 | 2,673.2 | |
| June | 583.9 | 951 | 2,507.7 | |
| July | 167.2 | 894.6 | 1,391 | |
| August | 2.9 | 751.3 | 981.3 | |
| September | 2.2 | 507.3 | 755.3 | |
| October | 1.8 | 9.2 | 171.4 | |
| November | 1.8 | 8.4 | 178.4 | |
| December | 1.7 | 7.3 | 43.7 |
All values in cubic feet per second (cfs).