Koyukuk Flats-Koyukuk River HUC8 19090108
A 17,134 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
76
Healthy
Drought index
0
None
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 1 reporting
Median flow
289%
p82 of record
Water assets
7
1 springs · 5 wells
USGS gauges (1)
- KOYUKUK R AT HUGHES AK1556490053,400 cfsp82 · above normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 0 | 0 | 0/1 | p82 |
Top water assets
- 53Groundwater — Adlwell
- 53Surface Water — Adlspring
- 41Ka00702519Bdbc2 001well
- 41Ka00702519Bdbc1 001well
- 40Ka00702519Bcac1 002well
- 40Ka00702233Ccac1 001well
- 39Koyukuk R At Hughes Akriver