Upper Green HUC8 14040101
A 7,602 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
62
Moderate
Drought index
202
Severe
Area in D2+
2.28%
0% exceptional (D4)
Gauges below normal
33%
of 3 reporting
Median flow
86%
p35 of record
Water assets
804
117 springs · 392 wells
USGS gauges (5)
- FONTENELLE C NR HERSCHLER RANCH, NR FONTENELLE, WY0921050020 cfsp22 · below normal
- GREEN RIVER NEAR LA BARGE, WY09209400579 cfsp35 · normal
- GREEN RIVER AT WARREN BRIDGE, NEAR DANIEL, WY09188500316 cfsp58 · normal
- Forty Rod Creek at Daniel Hatchery, nr Daniel, WY0918902018 cfsno long-term record
- North Cottonwood Cr bl Halverson Cr, nr Daniel, WY091911509 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 202 | 2.28 | 1/3 | p35 |
Top water assets
- 69Fontenelle Creekriver
- 69North Cottonwood Cr Bl Halverson Cr, Nr Daniel, Wyriver
- 69Fontenelle Creekriver
- 69Green Riverriver
- 69Green River Near La Barge, Wyriver
- 69Roney Creekriver
- 69Fontenelle C Nr Herschler Ranch, Nr Fontenelle, Wyriver
- 69Green River At Warren Bridge, Near Daniel, Wyriver
- 69Fontenelle Creekriver
- 69Fontenelle Creekriver