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 2026-09-01); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
61
Moderate
Drought index
246
Severe
Area in D2+
45.89%
0% exceptional (D4)
Gauges below normal
0%
of 1 reporting
Median flow
306%
p89 of record
Water assets
34
12 springs · 2 wells
USGS gauges (3)
- SIUSLAW RIVER NEAR MAPLETON, OR14307620337 cfsp89 · above normal
- SIUSLAW RIVER NEAR ALMA, OR1430695043 cfsno long-term record
- LAKE CREEK AT SWISSHOME, OR14307605185 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 246 | 45.89 | 0/1 | p89 |
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