USGS Streamgage 12338300
NF Blackfoot River ab Dry Gulch near Ovando, MT
NF Blackfoot River ab Dry Gulch near Ovando, MT is USGS streamgage 12338300 in Montana, monitoring river discharge in hydrologic subbasin 17010203. It drains a watershed of about 310 square miles. Discharge records at this site go back to 1997. Typical flow runs near 346.6 cfs in July and 299 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Montana
- Drainage area
- 310 sq mi
- Gauge elevation
- 4,079 ft
- Subbasin (HUC-8)
- 17010203
- Coordinates
- 46.97949, -113.09219
- USGS site number
- 12338300
- Records begin
- 1997-10-01 (29 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 28 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 | 85.3 | 105.2 | 131.5 | |
| February | 75.9 | 97.1 | 132.8 | |
| March | 78.3 | 102.6 | 233 | |
| April | 124.6 | 299 | 699 | |
| May | 593.3 | 1,153.1 | 2,383.2 | |
| June | 594.7 | 1,042.6 | 2,055.3 | |
| July | 256.2 | 346.6 | 640 | |
| August | 166.7 | 207.2 | 276.5 | |
| September | 137 | 166.3 | 207.6 | |
| October | 121.6 | 149.1 | 183.8 | |
| November | 115.9 | 134.4 | 202.5 | |
| December | 95.5 | 115.5 | 159.6 |
All values in cubic feet per second (cfs).