Beaverhead HUC8 10020002
A 3,889 km² sub-basin of the Missouri region in MT. Drought coverage is from the US Drought Monitor (map of 2026-09-01); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
46
Stressed
Drought index
181
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
100%
of 4 reporting
Median flow
42%
p8 of record
Water assets
1,435
11 springs · 221 wells
USGS gauges (4)
- Beaverhead River at Barretts MT0601600073 cfsp6 · much below normal
- Beaverhead River at Dillon MT0601700077 cfsp8 · much below normal
- Beaverhead River near Twin Bridges MT0601850076 cfsp9 · much below normal
- Beaverhead River at Twin Bridges, MT06023100259 cfsp15 · below normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 181 | 0 | 4/4 | p8 |
Top water assets
- 69Jake Canyon Creekriver
- 69Divide Creekriver
- 69Grasshopper Creekriver
- 69Beaverhead Riverriver
- 69Grasshopper Creekriver
- 69Blacktail Deer Creekriver
- 69Beaverhead River At Barretts Mtriver
- 69Beaverhead River At Dillon Mtriver
- 69Spring Creekriver
- 69Lake Creekriver