Blackfoot River above Nevada Creek near Helmville Mount
USGS Site No: 12335100 • Blackfoot River • Powell County, MT
Blackfoot River above Nevada Creek near Helmville Mount on the Blackfoot River is currently at 1,100 cfs (Very High — 136th percentile for this date) . Gage height: 5.85 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for October 28 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.
| Percentile | Label | CFS Threshold | Today's Flow |
|---|---|---|---|
| 10th | Very Low threshold | 141 | |
| 25th | Low threshold | 152 | |
| 50th (Median) | Normal (median) | 162 | |
| 75th | High threshold | 182 | |
| 95th | Very High threshold | 217 |
30-Day Hydrograph
Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.
30-Day Flow History
| Date | Discharge (CFS) | Gage Ht (ft) |
|---|---|---|
| May 28, 2026 | 967 | — |
| May 27, 2026 | 881 | — |
| May 26, 2026 | 798 | — |
| May 25, 2026 | 752 | — |
| May 24, 2026 | 750 | — |
| May 23, 2026 | 776 | — |
| May 22, 2026 | 821 | — |
| May 21, 2026 | 873 | — |
| May 20, 2026 | 883 | — |
| May 19, 2026 | 936 | — |
| May 18, 2026 | 1,010 | — |
| May 17, 2026 | 1,080 | — |
| May 16, 2026 | 1,160 | — |
| May 15, 2026 | 1,240 | — |
| Apr 20, 2026 | 779 | — |
| Apr 19, 2026 | 809 | — |
| Apr 18, 2026 | 849 | — |
| Apr 17, 2026 | 887 | — |
| Apr 16, 2026 | 920 | — |
| Apr 15, 2026 | 915 | — |
| Apr 14, 2026 | 912 | — |
| Apr 13, 2026 | 877 | — |
| Apr 12, 2026 | 794 | — |
| Apr 11, 2026 | 750 | — |
| Apr 10, 2026 | 733 | — |
| Apr 9, 2026 | 713 | — |
| Apr 8, 2026 | 675 | — |
| Apr 7, 2026 | 654 | — |
| Apr 6, 2026 | 660 | — |
| Apr 5, 2026 | 677 | — |
Station Information
- USGS Site No
- 12335100
- State
- MT
- County
- Powell County
- Coordinates
- 46.9188, -113.0150
- Drainage Area
- 498 mi²
- Datum (ft)
- 4,255.4
- HUC Code
- 17010203
Recent Extremes
- Max discharge
-
1,240 cfsMay 15, 2026
- Min discharge
-
109 cfsSep 11, 2025
Computed from the local daily-values archive.
Nearby Gauges
-
Nf Blackfoot River above Dry Gulch near Ovando MountVery High5.6 mi · 2,270 cfs
-
Clark Fork Near Drummond MountHigh20.7 mi · 806 cfs
-
Flint Creek Near Drummond MountVery High21.0 mi · 206 cfs
-
Clark Fork at Goldcreek MountNormal23.1 mi · 466 cfs
-
Little Blackfoot River Near Garrison MountVery High29.5 mi · 153 cfs