Alsea HUC8 17100205
A 2,175 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
57
Moderate
Drought index
138
Moderate
Area in D2+
5.46%
0% exceptional (D4)
Gauges below normal
50%
of 2 reporting
Median flow
60%
p20 of record
Water assets
35
7 springs · 8 wells
USGS gauges (2)
- ALSEA RIVER NEAR TIDEWATER, OR1430650068 cfsp9 · much below normal
- EAST FORK LOBSTER CREEK NEAR ALSEA, OR.143063401 cfsp32 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 138 | 5.46 | 1/2 | p20 |
| 2026-10-20 | 138 | 5.46 | 1/2 | p26 |
| 2026-10-19 | 138 | 5.46 | 1/2 | p28 |
| 2026-10-18 | 138 | 5.46 | 1/2 | p29 |
| 2026-10-17 | 138 | 5.46 | 1/2 | p27 |
| 2026-10-16 | 138 | 5.46 | 1/2 | p26 |
| 2026-10-15 | 138 | 5.46 | 1/2 | p28 |
| 2026-10-14 | 138 | 5.46 | 1/2 | p26 |
| 2026-10-13 | 138 | 5.46 | 1/2 | p25 |
| 2026-10-12 | 138 | 5.46 | 1/2 | p29 |
| 2026-10-11 | 138 | 5.46 | 1/2 | p23 |
| 2026-10-10 | 138 | 5.46 | 1/2 | p31 |
| 2026-10-09 | 138 | 5.46 | 1/2 | p33 |
| 2026-10-08 | 138 | 5.46 | 1/2 | p37 |
Top water assets
- 73Unnamed Stream — Industrial/Manufacturing Usesspring
- 66Crooked Creek — Irrigationspring
- 66A Well — Group Domesticwell
- 65Alsea River Near Tidewater, Orriver
- 65East Fork Lobster Creek Near Alsea, Or.river
- 58A Well — Irrigationwell
- 58East Unnamed Stream — Irrigationspring
- 58Well 3 — Group Domesticwell
- 58Unnamed Stream — Domesticspring
- 54Unnamed Stream — Domesticspring