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 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
63
Moderate
Drought index
200
Severe
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
40%
of 5 reporting
Median flow
48%
p26 of record
Water assets
2,332
2 springs · 14 wells
USGS gauges (6)
- CASEY FORK AT MOUNT VERNON, IL055958202 cfsp9 · much below normal
- BIG MUDDY RIVER AT RTE 127 AT MURPHYSBORO, IL0559949084 cfsp19 · below normal
- RAYSE CREEK NEAR WALTONVILLE, IL055957300 cfsp26 · normal
- BIG MUDDY RIVER AT PLUMFIELD, IL0559700043 cfsp28 · normal
- CRAB ORCHARD CREEK NEAR MARION, IL055975000 cfsp30 · normal
- BIG MUDDY RIVER BELOW REND LAKE NR BENTON, IL0559595246 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 200 | 0 | 2/5 | p26 |
| 2026-10-20 | 200 | 0 | 2/5 | p25 |
| 2026-10-19 | 200 | 0 | 2/5 | p25 |
| 2026-10-18 | 200 | 0 | 1/5 | p29 |
| 2026-10-17 | 200 | 0 | 2/5 | p35 |
| 2026-10-16 | 200 | 0 | 2/5 | p36 |
| 2026-10-15 | 100 | 0 | 1/5 | p38 |
| 2026-10-14 | 100 | 0 | 3/5 | p25 |
| 2026-10-13 | 100 | 0 | 2/5 | p31 |
| 2026-10-12 | 100 | 0 | 2/5 | p29 |
| 2026-10-11 | 100 | 0 | 2/5 | p26 |
| 2026-10-10 | 100 | 0 | 3/5 | p25 |
| 2026-10-09 | 100 | 0 | 3/5 | p23 |
| 2026-10-08 | 100 | 0 | 2/5 | p29 |
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