The Ohio Feeder is a term used to refer to two rivers in the United States: the Wabash and the Cumberland. The Wabash is a 6-letter river that flows through Indiana, Illinois, and Ohio. It is the longest free-flowing river east of the Mississippi River. The Cumberland is a 10-letter river that runs through Kentucky, Tennessee, and Virginia. It is the longest river in the Appalachian Mountains. Both rivers are important sources of water for the states they flow through.