Lower Snake-Asotin HUC8 17060103
A 1,803 km² sub-basin of the Pacific Northwest region in ID, OR, WA. 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
47
Stressed
Drought index
300
Extreme
Area in D2+
100%
0% exceptional (D4)
Gauges below normal
67%
of 3 reporting
Median flow
93%
p18 of record
Water assets
714
71 springs · 125 wells
USGS gauges (3)
- SNAKE RIVER NEAR ANATONE, WA1333430013,000 cfsp10 · much below normal
- SNAKE RIVER AT McDUFF RAPIDS AT CHINA GARDEN ID1331766012,600 cfsp18 · below normal
- ASOTIN CREEK AT ASOTIN, WA1333505035 cfsp34 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 300 | 100 | 2/3 | p18 |
| 2026-10-20 | 300 | 100 | 2/3 | p20 |
| 2026-10-19 | 300 | 100 | 2/3 | p21 |
| 2026-10-18 | 300 | 100 | 2/3 | p23 |
| 2026-10-17 | 300 | 100 | 1/3 | p28 |
| 2026-10-16 | 300 | 100 | 1/3 | p28 |
| 2026-10-15 | 300 | 100 | 1/3 | p25 |
| 2026-10-14 | 300 | 100 | 2/3 | p17 |
| 2026-10-13 | 300 | 100 | 2/3 | p12 |
| 2026-10-12 | 300 | 100 | 2/3 | p10 |
| 2026-10-11 | 300 | 100 | 2/3 | p10 |
| 2026-10-10 | 300 | 100 | 3/3 | p9 |
| 2026-10-09 | 300 | 100 | 3/3 | p10 |
| 2026-10-08 | 300 | 100 | 2/3 | p9 |
Top water assets
- 76Mu — Ce S3-*03433Cwrisspring
- 76Mu — Ce S3-*10044Cspring
- 67South Fork Asotin Creekriver
- 67South Fork Asotin Creekriver
- 67North Fork Asotin Creekriver
- 67North Fork Asotin Creekriver
- 67South Fork Asotin Creekriver
- 67Tenmile Creekriver
- 67North Fork Asotin Creekriver
- 67South Fork Asotin Creekriver