Upper Green-Slate HUC8 14040103
A 3,964 km² sub-basin of the Upper Colorado region in WY. 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
47
Stressed
Drought index
281
Severe
Area in D2+
80.88%
0% exceptional (D4)
Gauges below normal
100%
of 1 reporting
Median flow
68%
p19 of record
Water assets
720
29 springs · 89 wells
USGS gauges (1)
- GREEN RIVER BELOW FONTENELLE RESERVOIR, WY09211200751 cfsp19 · below normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 281 | 80.88 | 1/1 | p19 |
Top water assets
- 69Green Riverriver
- 69Green Riverriver
- 69Green River Below Fontenelle Reservoir, Wyriver
- 69Alkali Creekriver
- 69Alkali Creekriver
- 69Green Riverriver
- 69Green Riverriver
- 69Green Riverriver
- 69Alkali Creekriver
- 69Green Riverriver