<P> The Ohio River , which streams 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 ( Ohio at Cairo : 281,500 cu ft / s ( 7,960 m / s ) ; Mississippi at Thebes : 208,200 cu ft / s ( 5,897 m / s ) ) and , thus , is hydrologically the main stream of the whole river system . </P>
<P> The Ohio River , which streams 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 ( Ohio at Cairo : 281,500 cu ft / s ( 7,960 m / s ) ; Mississippi at Thebes : 208,200 cu ft / s ( 5,897 m / s ) ) and , thus , is hydrologically the main stream of the whole river system . </P>
where does the ohio river start and finish
where does the ohio river start and finish
Pittsburgh , Pennsylvania the Mississippi River
Pittsburgh , Pennsylvania the Mississippi River