River - Cache
The Cache River in southern Illinois includes drainage to both the Mississippi River and the Ohio River. After construction of a diversion channel called the Post Creek Cutoff, the river was divided into two separate flows: the Upper Cache, which drains down the diversion channel to the Ohio, and the Lower Cache, which drains to the Mississippi. The two rivers together, excluding the Post Creek Cutoff, are 93 miles in length and have a drainage area of approximately 740 square miles. Major tributaries include Mill Creek, Big Creek, and Cypress Creek.