Lower Cowlitz HUC8 17080005
A 3,757 km² sub-basin of the Pacific Northwest region in WA. 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
64
Moderate
Drought index
95
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
50%
of 6 reporting
Median flow
81%
p28 of record
Water assets
3,258
65 springs · 1,330 wells
USGS gauges (6)
- COWLITZ RIVER NEAR KOSMOS, WA14233500661 cfsp7 · much below normal
- NF TOUTLE RIVER BELOW SRS NEAR KID VALLEY, WA14240525169 cfsp9 · much below normal
- TOUTLE RIVER AT TOWER ROAD NEAR SILVER LAKE, WA14242580319 cfsp22 · below normal
- TILTON RIVER AB BEAR CANYON CREEK NEAR CINEBAR, WA1423620072 cfsp34 · normal
- COWLITZ RIVER AT CASTLE ROCK, WA142430002,520 cfsp38 · normal
- COWLITZ RIVER BELOW MAYFIELD DAM, WA142380002,370 cfsp46 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 95 | 0 | 3/6 | p28 |
Top water assets
- 76Po — Pe S2-*06948spring
- 76Fs — Ap S2-29644spring
- 73Ir — Ap S2-29108spring
- 73Dm — Ap S2-29058spring
- 67Trouble Creekriver
- 67Shultz Creekriver
- 67Shultz Creekriver
- 67Cowlitz Fallsreservoir
- 67Mayfieldreservoir
- 67Castle Creekriver