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 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
46
Stressed
Drought index
300
Extreme
Area in D2+
100%
0% exceptional (D4)
Gauges below normal
100%
of 1 reporting
Median flow
74%
p11 of record
Water assets
1,313
67 springs · 28 wells
USGS gauges (1)
- GRANDE RONDE RIVER AT TROY, OR13333000591 cfsp11 · below normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 300 | 100 | 1/1 | p11 |
| 2026-10-20 | 300 | 100 | 1/1 | p12 |
| 2026-10-19 | 300 | 100 | 1/1 | p12 |
| 2026-10-18 | 300 | 100 | 1/1 | p11 |
| 2026-10-17 | 300 | 100 | 1/1 | p12 |
| 2026-10-16 | 300 | 100 | 1/1 | p14 |
| 2026-10-15 | 300 | 100 | 1/1 | p15 |
| 2026-10-14 | 300 | 100 | 1/1 | p13 |
| 2026-10-13 | 300 | 100 | 1/1 | p16 |
| 2026-10-12 | 300 | 100 | 1/1 | p14 |
| 2026-10-11 | 300 | 100 | 1/1 | p16 |
| 2026-10-10 | 300 | 100 | 1/1 | p14 |
| 2026-10-09 | 300 | 100 | 1/1 | p15 |
| 2026-10-08 | 300 | 100 | 1/1 | p13 |
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