Upper Koyukuk River HUC8 19090101
A 17,953 km² sub-basin of the Alaska region in AK. 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
77
Healthy
Drought index
0
None
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 1 reporting
Median flow
207%
p78 of record
Water assets
47
22 springs · 14 wells
USGS gauges (1)
- SLATE C AT COLDFOOT AK15564879238 cfsp78 · above normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 0 | 0 | 0/1 | p78 |
Top water assets
- 53Surface Water — Adlspring
- 53Surface Water — Adlspring
- 53Surface Water — Lasspring
- 53Surface Water — Adlspring
- 53Groundwater — Laswell
- 53Surface Water — Adlspring
- 53Surface Water — Adlspring
- 53Surface Water — Adlspring
- 53Surface Water — Adlspring
- 53Surface Water — Adlspring