Rock HUC8 10050015
A 3,545 km² sub-basin of the Missouri region in CN, 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
86
Healthy
Drought index
0
None
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 1 reporting
Median flow
135%
p71 of record
Water assets
1,032
0 springs · 50 wells
USGS gauges (1)
- Rock Creek bl Horse Creek nr int'l boundary061695003 cfsp71 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-20 | 0 | 0 | 0/1 | p71 |
| 2026-10-19 | 0 | 0 | 0/1 | p71 |
| 2026-10-18 | 0 | 0 | 0/1 | p71 |
| 2026-10-17 | 0 | 0 | 0/1 | p66 |
| 2026-10-16 | 0 | 0 | 0/1 | p62 |
| 2026-10-15 | 0 | 0 | 0/1 | p70 |
| 2026-10-14 | 0 | 0 | 0/1 | p70 |
| 2026-10-13 | 0 | 0 | 0/1 | p67 |
| 2026-10-12 | 0 | 0 | 0/1 | p50 |
| 2026-10-11 | 0 | 0 | 0/1 | p45 |
| 2026-10-10 | 0 | 0 | 0/1 | p51 |
| 2026-10-09 | 0 | 0 | 0/1 | p48 |
| 2026-10-08 | 0 | 0 | 0/1 | p48 |
| 2026-10-07 | 0 | 0 | 0/1 | p47 |
Top water assets
- 67Rock Creekriver
- 67Rock Creekriver
- 67Rock Creekriver
- 67Willow Creekriver
- 67Rock Creekriver
- 67Rock Creekriver
- 67Deep Creekriver
- 67Deep Creekriver
- 67Rock Creek Bl Horse Creek Nr Int'L Boundaryriver
- 67Rock Creekriver