The biggest tributary of the Mississippi runs through what Indiana county?
Magnet, Indiana Magnet is an unincorporated community along the Ohio River in Union Township, Perry County, in the U.S. state of Indiana.
Plum River The Plum River is a tributary of the Mississippi River, about 46.6 mi long, in northwestern Illinois in the United States. It rises in Jo Daviess County and flows generally south-southwestwardly into Carroll County, where it joins the Mississippi at Savanna. Among its several short tributaries are: