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 2026-09-01); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
69
Moderate
Drought index
103
Moderate
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 |
|---|---|---|---|---|
| 2026-09-07 | 103 | 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