West Nishnabotna HUC8 10240002
A 4,277 km² sub-basin of the Missouri region in IA. 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
83
Healthy
Drought index
47
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 2 reporting
Median flow
73%
p38 of record
Water assets
1,584
0 springs · 252 wells
USGS gauges (2)
- West Nishnabotna River at Randolph, IA06808500274 cfsp37 · normal
- West Nishnabotna River at Hancock, IA06807410115 cfsp40 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 47 | 0 | 0/2 | p38 |
Top water assets
- 66Tim Temeyer Damreservoir
- 66Hopp Dam (Upper Site)reservoir
- 65West Nishnabotna River At Randolph, Iariver
- 65West Nishnabotna River At Hancock, Iariver
- 65Harold Damreservoir
- 65West Nishnabotna Riverriver
- 65East Branch West Nishnabotna Riverriver
- 65Long Branchriver
- 65Hopp Dam (Lower Site)reservoir
- 65Mud Creekriver