Chief Joseph HUC8 17020005
A 3,467 km² sub-basin of the Pacific Northwest region in WA. 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
55
Moderate
Drought index
215
Severe
Area in D2+
13.75%
0% exceptional (D4)
Gauges below normal
—
no gauges reporting
Median flow
—
of normal for the date
Water assets
1,078
26 springs · 296 wells
USGS gauges (0)
No active discharge gauges in this sub-basin.
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 215 | 13.75 | — | — |
Top water assets
- 68Grand Coulee Damreservoir
- 67Stepstone Creekriver
- 67Stepstone Creekriver
- 67Stepstone Creekriver
- 67Stepstone Creekriver
- 67Stepstone Creekriver
- 67Stepstone Creekriver
- 67Wellsreservoir
- 67Stepstone Creekriver
- 67Stepstone Creekriver