Siuslaw HUC8 17100206
A 2,007 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
39
Stressed
Drought index
208
Severe
Area in D2+
46.05%
0% exceptional (D4)
Gauges below normal
100%
of 1 reporting
Median flow
34%
p9 of record
Water assets
34
12 springs · 2 wells
USGS gauges (3)
- SIUSLAW RIVER NEAR MAPLETON, OR1430762080 cfsp9 · much below normal
- SIUSLAW RIVER NEAR ALMA, OR1430695045 cfsno long-term record
- LAKE CREEK AT SWISSHOME, OR1430760543 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-22 | 208 | 46.05 | 1/1 | p9 |
| 2026-10-21 | 208 | 46.05 | 1/1 | p9 |
| 2026-10-20 | 208 | 46.05 | 1/1 | p10 |
| 2026-10-19 | 208 | 46.05 | 1/1 | p10 |
| 2026-10-18 | 208 | 46.05 | 1/1 | p10 |
| 2026-10-17 | 208 | 46.05 | 1/1 | p12 |
| 2026-10-16 | 208 | 46.05 | 1/1 | p15 |
| 2026-10-15 | 208 | 46.05 | 1/1 | p14 |
| 2026-10-14 | 208 | 46.05 | 1/1 | p16 |
| 2026-10-13 | 208 | 46.05 | 1/1 | p14 |
| 2026-10-12 | 208 | 46.05 | 1/1 | p15 |
| 2026-10-11 | 208 | 46.05 | 1/1 | p17 |
| 2026-10-10 | 208 | 46.05 | 0/1 | p27 |
| 2026-10-09 | 208 | 46.05 | 0/1 | p28 |
Top water assets
- 66San Antone Creek — Industrial/Manufacturing Usesspring
- 662 Unn Spring Streams — Domesticspring
- 66West Fork Deadwood Creek — Irrigationspring
- 66Kelly Creek — Irrigationspring
- 65Siuslaw River Near Alma, Orriver
- 65Hult Pond Damreservoir
- 65Lake Creek At Swisshome, Orriver
- 65Siuslaw River Near Mapleton, Orriver
- 65Farnam Creek Reservoirreservoir
- 62Patterson Creek — Industrial/Manufacturing Usesspring