USGS Streamgage 12310100
Kootenai River Tribal Hatchery near Bonners Ferry
Kootenai River Tribal Hatchery near Bonners Ferry is USGS streamgage 12310100 in Idaho, monitoring river discharge in hydrologic subbasin 17010104. Discharge records at this site go back to 2002. Typical flow runs near 15,871 cfs in July and 11,862 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Idaho
- Gauge elevation
- 1,774 ft
- Subbasin (HUC-8)
- 17010104
- Coordinates
- 48.70528, -116.36972
- USGS site number
- 12310100
- Records begin
- 2002-10-01 (24 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 21 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 | 4,787.1 | 5,858.7 | 17,706.5 | |
| February | 4,760 | 5,840.3 | 17,857.1 | |
| March | 5,198.4 | 7,900 | 20,883.9 | |
| April | 7,219 | 11,862 | 33,400 | |
| May | 12,410 | 27,803.2 | 38,783.9 | |
| June | 14,340.3 | 26,776.7 | 41,696.7 | |
| July | 8,447.4 | 15,871 | 26,529 | |
| August | 7,691 | 10,748.4 | 17,967.7 | |
| September | 6,796 | 8,038.3 | 10,883.3 | |
| October | 4,773.5 | 5,288.4 | 8,089.7 | |
| November | 5,358 | 12,422.7 | 22,110 | |
| December | 11,560 | 20,790.3 | 28,438.7 |
All values in cubic feet per second (cfs).
Common questions
- When does Kootenai River Tribal Hatchery near Bonners Ferry normally run highest?
- May, on the long-term record. The median daily flow that month is about 27,803.2 cfs, against 5,288.4 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 Kootenai River Tribal Hatchery near Bonners Ferry?
- It depends on the month. In January, half of days historically fall near 5,858.7 cfs, with the middle 80% of days between 4,787.1 and 17,706.5 cfs. The month-by-month table on this page gives the full range.
- How long has Kootenai River Tribal Hatchery near Bonners Ferry been measured?
- Discharge records at USGS site 12310100 begin in 2002, about 24 years, covering roughly 7,330 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Kootenai River Tribal Hatchery near Bonners Ferry?
- The gauge sits at 48.70528, -116.36972, in Idaho, in hydrologic subbasin 17010104, at an elevation of about 1,774 feet.
- Can I use Kootenai River Tribal Hatchery near Bonners Ferry 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.