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 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
80
Healthy
Drought index
17
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 2 reporting
Median flow
152%
p63 of record
Water assets
1,506
2 springs · 707 wells
USGS gauges (2)
- Big Muddy Creek nr mouth nr Culbertson MT061851104 cfsp41 · normal
- Big Muddy Creek near Antelope MT0618345014 cfsp85 · above normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-20 | 17 | 0 | 0/2 | p63 |
| 2026-10-19 | 17 | 0 | 0/2 | p62 |
| 2026-10-18 | 17 | 0 | 0/2 | p64 |
| 2026-10-17 | 17 | 0 | 0/2 | p45 |
| 2026-10-16 | 17 | 0 | 0/2 | p68 |
| 2026-10-15 | 29 | 0 | 0/2 | p68 |
| 2026-10-14 | 29 | 0 | 0/2 | p56 |
| 2026-10-13 | 29 | 0 | 0/2 | p51 |
| 2026-10-12 | 29 | 0 | 1/2 | p39 |
| 2026-10-11 | 29 | 0 | 1/2 | p32 |
| 2026-10-10 | 29 | 0 | 1/2 | p33 |
| 2026-10-09 | 29 | 0 | 1/2 | p34 |
| 2026-10-08 | 29 | 0 | 1/2 | p37 |
| 2026-10-07 | 29 | 0 | 1/2 | p37 |
Top water assets
- 67Wolf Creekriver
- 67Plentywood Creekriver
- 67Big Muddy Creekriver
- 67Smoke Creekriver
- 67Smoke Creekriver
- 67Smoke Creekriver
- 67Plentywood Creekriver
- 67Whitetail Creekriver
- 67Smoke Creekriver
- 67Eagle Creekriver