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 sits on the Sf Boise River, alongside 2 other gauges Rivermatics tracks on the same river. 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).
Common questions
- When does SF Boise River at Neal Bridge near Arrowrock Dam, ID normally run highest?
- May, on the long-term record. The median daily flow that month is about 2,699 cfs, against 354.6 cfs in October, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for SF Boise River at Neal Bridge near Arrowrock Dam, ID?
- It depends on the month. In May, half of days historically fall near 2,699 cfs, with the middle 80% of days between 410.3 and 6,385.6 cfs. The month-by-month table on this page gives the full range.
- How long has SF Boise River at Neal Bridge near Arrowrock Dam, ID been measured?
- Discharge records at USGS site 13192200 begin in 1977, about 49 years, covering roughly 5,574 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is SF Boise River at Neal Bridge near Arrowrock Dam, ID?
- The gauge sits at 43.55056, -115.72194, in Idaho, in hydrologic subbasin 17050113, draining roughly 1,172 square miles.
- Can I use SF Boise River at Neal Bridge near Arrowrock Dam, ID data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.
Upstream and downstream on the Sf Boise River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Sf Boise River in full.
- SF Boise River near Featherville, ID 641 sq mi
- SF Boise River at Anderson Ranch Dam, ID 978 sq mi
- SF Boise River at Neal Bridge near Arrowrock Dam, ID this page