Lower Green-Diamond HUC8 14060010
A 4,211 km² sub-basin of the Upper Colorado region in CO, UT. 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
50
Moderate
Drought index
300
Extreme
Area in D2+
100%
0% exceptional (D4)
Gauges below normal
40%
of 5 reporting
Median flow
125%
p66 of record
Water assets
1,817
316 springs · 703 wells
USGS gauges (5)
- ASHLEY CREEK BEL UNION CANAL DIV NR JENSEN, UT092715500 cfsp0 · much below normal
- BIG BRUSH CRK ABV RED FLEET RES, NR VERNAL, UT0926170012 cfsp18 · below normal
- ASHLEY CR NR REMEMBER THE MAINE PARK NR VERNAL, UT0927100077 cfsp66 · normal
- ASHLEY CREEK NEAR VERNAL, UT0926650078 cfsp67 · normal
- BRUSH CREEK NEAR JENSEN, UTAH0926350011 cfsp98 · much above normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 300 | 100 | 2/5 | p66 |
Top water assets
- 74Underground Water Wells (2) — Dosxwell
- 74Ashley Spring — Ospring
- 69Ashley Creekriver
- 69Ashley Creek Near Vernal, Utriver
- 69Big Brush Creekriver
- 69Ashley Creekriver
- 69Brush Creekriver
- 69Dry Forkriver
- 69Mosby Canal Near Lapoint, Utriver
- 69South Fork Ashley Creekriver