Fortymile River HUC8 19070502
A 16,818 km² sub-basin of the Alaska region in AK, CN. 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
66
Moderate
Drought index
100
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
—
no gauges reporting
Median flow
—
of normal for the date
Water assets
45
42 springs · 1 wells
USGS gauges (2)
- WADE C TRIB NR CHICKEN AK15320100no readingno long-term record
- FORTYMILE R NR STEELE CREEK AK15348000no readingno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-18 | 100 | 0 | — | — |
| 2026-10-17 | 100 | 0 | — | — |
| 2026-10-16 | 100 | 0 | — | — |
| 2026-10-15 | 100 | 0 | — | — |
| 2026-10-14 | 100 | 0 | — | — |
| 2026-10-13 | 100 | 0 | 0/1 | p57 |
| 2026-10-12 | 100 | 0 | 0/1 | p29 |
| 2026-10-11 | 100 | 0 | 1/1 | p12 |
| 2026-10-10 | 100 | 0 | 1/1 | p24 |
| 2026-10-09 | 100 | 0 | 0/1 | p44 |
| 2026-10-08 | 100 | 0 | 0/1 | p39 |
| 2026-10-07 | 100 | 0 | 1/2 | p25 |
| 2026-10-06 | 100 | 0 | 1/2 | p22 |
| 2026-10-05 | 100 | 0 | 1/2 | p25 |
Top water assets
- 53Surface Water — Adlspring
- 53Groundwater — Adlwell
- 53Surface Water — Adlspring
- 53Surface Water — Adlspring
- 53Surface Water — Adlspring
- 53Surface Water — Adlspring
- 53Surface Water — Lasspring
- 53Surface Water — Lasspring
- 53Surface Water — Lasspring
- 53Surface Water — Lasspring