Big Muddy HUC8 07140106
A 6,179 km² sub-basin of the Upper Mississippi region in IL. 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
69
Moderate
Drought index
29
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
60%
of 5 reporting
Median flow
53%
p10 of record
Water assets
2,332
2 springs · 14 wells
USGS gauges (6)
- CASEY FORK AT MOUNT VERNON, IL055958202 cfsp8 · much below normal
- BIG MUDDY RIVER AT RTE 127 AT MURPHYSBORO, IL0559949076 cfsp9 · much below normal
- RAYSE CREEK NEAR WALTONVILLE, IL055957300 cfsp10 · below normal
- BIG MUDDY RIVER AT PLUMFIELD, IL0559700067 cfsp27 · normal
- CRAB ORCHARD CREEK NEAR MARION, IL055975000 cfsp55 · normal
- BIG MUDDY RIVER BELOW REND LAKE NR BENTON, IL0559595239 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 29 | 0 | 3/5 | p10 |
Top water assets
- 66Consol/Rend Lake Mine/Slurry Cell 2 Damreservoir
- 66Rend Damreservoir
- 66Little Grassy Damreservoir
- 66Carbondale Reservoir Damreservoir
- 66Lake Murphysboro Damreservoir
- 66Springfield Coal/Orient 6 /South Slurry Cell Damreservoir
- 66Ill Coal Recovery/Old Ed Mine 21/Slurry Cell 4 Damreservoir
- 66Liberty Land/Mine 26/Slurry Cell 3 Damreservoir
- 66Devil`S Kitchen Damreservoir
- 66Spring Arbor Lake Damreservoir