Imnaha HUC8 17060102
A 2,203 km² sub-basin of the Pacific Northwest region in OR. 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
52
Moderate
Drought index
297
Severe
Area in D2+
97.13%
0% exceptional (D4)
Gauges below normal
—
no gauges reporting
Median flow
—
of normal for the date
Water assets
764
14 springs · 2 wells
USGS gauges (0)
No active discharge gauges in this sub-basin.
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 297 | 97.13 | — | — |
Top water assets
- 76L Sheep D/Mtn Sh Reservoir — Supplemental Irrigationspring
- 69McCully Creekriver
- 69Lick Creekriver
- 69Imnaha Riverriver
- 69South Fork Imnaha Riverriver
- 69Grouse Creekriver
- 69McCully Creekriver
- 69Lick Creekriver
- 69South Fork Imnaha Riverriver
- 69Big Sheep Creekriver