Big Muddy HUC8 10060006
A 8,906 km² sub-basin of the Missouri region in CN, MT, ND. 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
78
Healthy
Drought index
76
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 2 reporting
Median flow
109%
p45 of record
Water assets
1,506
2 springs · 707 wells
USGS gauges (2)
- Big Muddy Creek near Antelope MT061834501 cfsp37 · normal
- Big Muddy Creek nr mouth nr Culbertson MT061851102 cfsp54 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 76 | 0 | 0/2 | p45 |
Top water assets
- 67Wolf Creekriver
- 67Plentywood Creekriver
- 67Big Muddy Creekriver
- 67Smoke Creekriver
- 67Smoke Creekriver
- 67Smoke Creekriver
- 67Plentywood Creekriver
- 67Whitetail Creekriver
- 67Smoke Creekriver
- 67Eagle Creekriver