Siletz-Yaquina HUC8 17100204
A 2,271 km² sub-basin of the Pacific Northwest region in OR. 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
44
Stressed
Drought index
114
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
100%
of 1 reporting
Median flow
26%
p8 of record
Water assets
80
26 springs · 22 wells
USGS gauges (3)
- SILETZ RIVER AT SILETZ, OR1430550063 cfsp8 · much below normal
- SILETZ RIVER NEAR SILETZ, OR1430580064 cfsno long-term record
- BIG ELK CREEK NEAR ELK CITY, OR1430603210 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-19 | 114 | 0 | 1/1 | p8 |
| 2026-10-18 | 114 | 0 | 1/1 | p8 |
| 2026-10-17 | 114 | 0 | 1/1 | p8 |
| 2026-10-16 | 114 | 0 | 1/1 | p9 |
| 2026-10-15 | 114 | 0 | 1/1 | p8 |
| 2026-10-14 | 114 | 0 | 1/1 | p9 |
| 2026-10-13 | 114 | 0 | 1/1 | p9 |
| 2026-10-12 | 114 | 0 | 1/1 | p10 |
| 2026-10-11 | 114 | 0 | 1/1 | p10 |
| 2026-10-10 | 114 | 0 | 1/1 | p10 |
| 2026-10-09 | 114 | 0 | 1/1 | p10 |
| 2026-10-08 | 114 | 0 | 1/1 | p10 |
| 2026-10-07 | 114 | 0 | 1/1 | p10 |
| 2026-10-06 | 114 | 0 | 1/1 | p10 |
Top water assets
- 76Mill Creek — Domesticspring
- 66Big Creek #2 (Upper)reservoir
- 66A Spring — Domestic Expandedspring
- 66Panther Creek — Group Domesticspring
- 66Olallareservoir
- 66Mill Creekreservoir
- 66Johnson Creek — Domesticspring
- 66Unnamed Stream — Industrial/Manufacturing Usesspring
- 66Springs — Industrial/Manufacturing Usesspring
- 66Unnamed Stream — Domestic Expandedspring