USGS Streamgage 12324590
Little Blackfoot River near Garrison, MT
Little Blackfoot River near Garrison, MT is USGS streamgage 12324590 in Montana, monitoring river discharge in hydrologic subbasin 17010201. It drains a watershed of about 414 square miles. Discharge records at this site go back to 1972. Typical flow runs near 107.1 cfs in July and 200.1 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Montana
- Drainage area
- 414 sq mi
- Gauge elevation
- 4,363 ft
- Subbasin (HUC-8)
- 17010201
- Coordinates
- 46.51948, -112.79317
- USGS site number
- 12324590
- Records begin
- 1972-09-26 (54 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 53 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 | 34.9 | 55.1 | 96.9 | |
| February | 40.2 | 64.1 | 133.4 | |
| March | 56 | 98.4 | 223.5 | |
| April | 97.1 | 200.1 | 467.4 | |
| May | 139.3 | 405.4 | 939.4 | |
| June | 106 | 313.4 | 779.3 | |
| July | 46.1 | 107.1 | 256.5 | |
| August | 17.1 | 48.7 | 108.1 | |
| September | 22 | 45 | 88.8 | |
| October | 43.2 | 69.3 | 111.2 | |
| November | 48.3 | 70.1 | 109.8 | |
| December | 38.7 | 57.8 | 99.6 |
All values in cubic feet per second (cfs).
Other gauges in this subbasin
- Clark Fork at Goldcreek, MT
- Blacktail Creek above Grove Gulch, at Butte, MT
- Silver Bow Creek at Montana Street, at Butte, MT
- Silver Bow Creek below Blacktail Creek, at Butte, MT
- Silver Bow Creek at Opportunity, MT
- Mill Creek near Anaconda, MT
- Mill Creek at Opportunity, MT
- Willow Creek near Anaconda, MT