Big HUC8 07140104
A 2,513 km² sub-basin of the Upper Mississippi region in MO. 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
74
Moderate
Drought index
0
None
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
40%
of 5 reporting
Median flow
89%
p41 of record
Water assets
4,095
16 springs · 2,538 wells
USGS gauges (5)
- Big River below Bonne Terre, MO0701761030 cfsp8 · much below normal
- Big River below Desloge, MO0701726032 cfsp18 · below normal
- Big River near Richwoods, MO07018100116 cfsp41 · normal
- Big River at Byrnesville, MO07018500142 cfsp45 · normal
- Big River at Irondale, MO0701720019 cfsp61 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 0 | 0 | 2/5 | p41 |
Top water assets
- 67Council Bluff Damreservoir
- 67Eshbaugh-Martin Damreservoir
- 67St. Joe State Park Damreservoir
- 66Lac Shayne Damreservoir
- 66Cadet No. 1 Damreservoir
- 66Kingston No. 1 Damreservoir
- 66Lake Primrose Damreservoir
- 66Lac Marseilles Damreservoir
- 66Lac Darcie Damreservoir
- 66Wahoo Lake Damreservoir