Big Muddy River
| Big Muddy River | |
|---|---|
The Big Muddy River, south of Murphysboro, at a boat launch across from the Little Grand Canyon | |
| Physical characteristics | |
| Source | |
| • location | Jefferson County southeast of Centralia, Illinois |
| • coordinates | 38°28′27″N 89°05′25″W / 38.474216°N 89.0903471°W |
| Mouth | |
• location | Confluence with the Mississippi River southwest of Murphysboro, Illinois |
• coordinates | 37°34′25″N 89°31′01″W / 37.5736608°N 89.5170413°W |
• elevation | 341 ft (104 m) |
| Length | 156 mi (251 km) |
| Discharge | |
| • location | Murphysboro, Illinois |
| • average | 2,164 cu/ft. per sec. |
| Basin features | |
| Progression | Big Muddy River → Mississippi → Gulf of Mexico |
| GNIS ID | 404425 |
The Big Muddy River is a 156-mile-long (251 km) river in southern Illinois. It joins the Mississippi River just south of Grand Tower. The Big Muddy has been dammed near Benton, forming Rend Lake.
The Big Muddy has a mud bottom for most of its length.