USGS Streamgage 13192200
SF Boise River at Neal Bridge near Arrowrock Dam, ID
SF Boise River at Neal Bridge near Arrowrock Dam, ID is USGS streamgage 13192200 in Idaho, monitoring river discharge in hydrologic subbasin 17050113. It drains a watershed of about 1,172 square miles. Discharge records at this site go back to 1977. Typical flow runs near 1,759 cfs in July and 1,242 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Idaho
- Drainage area
- 1,172 sq mi
- Subbasin (HUC-8)
- 17050113
- Coordinates
- 43.55056, -115.72194
- USGS site number
- 13192200
- Records begin
- 1977-05-11 (49 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 9 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 | — | 373.9 | — | |
| February | — | 425.4 | — | |
| March | — | 523.5 | — | |
| April | — | 1,242 | — | |
| May | 410.3 | 2,699 | 6,385.6 | |
| June | 749.6 | 1,970.7 | 5,071 | |
| July | 1,520.1 | 1,759 | 2,063.5 | |
| August | 736.2 | 1,380.7 | 2,002.9 | |
| September | 476.8 | 528.2 | 1,320.6 | |
| October | — | 354.6 | — | |
| November | — | 355.8 | — | |
| December | — | 365.4 | — |
All values in cubic feet per second (cfs).