Big Dry HUC8 10040105
A 4,013 km² sub-basin of the Missouri region in MT. Drought coverage is from the US Drought Monitor (map of 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
79
Healthy
Drought index
0
None
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
—
no gauges reporting
Median flow
—
of normal for the date
Water assets
934
0 springs · 94 wells
USGS gauges (0)
No active discharge gauges in this sub-basin.
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 0 | 0 | — | — |
| 2026-10-20 | 0 | 0 | — | — |
| 2026-10-19 | 0 | 0 | — | — |
| 2026-10-18 | 0 | 0 | — | — |
| 2026-10-17 | 0 | 0 | — | — |
| 2026-10-16 | 0 | 0 | — | — |
| 2026-10-15 | 27 | 0 | — | — |
| 2026-10-14 | 27 | 0 | — | — |
| 2026-10-13 | 27 | 0 | — | — |
| 2026-10-12 | 27 | 0 | — | — |
| 2026-10-11 | 27 | 0 | — | — |
| 2026-10-10 | 27 | 0 | — | — |
| 2026-10-09 | 27 | 0 | — | — |
| 2026-10-08 | 30 | 0 | — | — |
Top water assets
- 67Sand Creekriver
- 67Big Dry Creekriver
- 67Drew #1reservoir
- 67Frazier Creekriver
- 67Sand Creekriver
- 67Woody Creekriver
- 67Big Dry Creekriver
- 67Hensleigh #2reservoir
- 67Big Dry Creekriver
- 67Sand Creekriver