Ohio River course forms the northern borders of West Virginia and Kentucky; and the southern borders of Ohio, Indiana and Illinois, until it joins the Mississippi River at the city of Cairo, Illinois. Where the Ohio joins the Mississippi is the lowest elevation in the state of Illinois, at . The Ohio River, which flows westward from Pittsburgh, Pennsylvania, to Cairo, Illinois, is the largest tributary, by volume, of the Mississippi River in the United States. At the confluence, the Ohio is considerably bigger than the Mississippi. Measured by long-term mean discharge in cubic feet per second and cubic meters per second,
Egypt River Egypt River The Egypt River is a stream in Ipswich, Massachusetts, United States. The river is formed by the confluence of Bull and Dow brooks below their reservoirs, and in turn joins the Muddy River and then the Rowley River, which empties into the Plum Island Sound. The Rowley River runs through salt marshes, in which it forms a narrow and winding inlet about in total length. The name "Egypt River" is recorded as early as 1635. In early colonial times, it was also termed the "North River". It was then a source of herring and smelt, but few have