Lower Grande Ronde HUC8 17060106
A 3,933 km² sub-basin of the Pacific Northwest region in OR, 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
66
Moderate
Drought index
300
Extreme
Area in D2+
100%
0% exceptional (D4)
Gauges below normal
0%
of 1 reporting
Median flow
93%
p36 of record
Water assets
1,313
67 springs · 28 wells
USGS gauges (1)
- GRANDE RONDE RIVER AT TROY, OR13333000598 cfsp36 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 300 | 100 | 0/1 | p36 |
Top water assets
- 67Joseph Creekriver
- 67Grossman Creekriver
- 67West Fork Menatchee Creekriver
- 67Bear Creekriver
- 67Menatchee Creekriver
- 67Peavine Creekriver
- 67Beaver Creekriver
- 67Melton Creekriver
- 67First Creekriver
- 67East Grossman Creekriver