 At the head of the McClellan @-@ Kerr Arkansas River Navigation System , the Tulsa Port of Catoosa is the most inland ocean @-@ going port in the United States and connects barge traffic from Tulsa to the Mississippi River via the Verdigris and Arkansas rivers . The facility is one of the largest riverports in the United States and contributes to one of the busiest waterways in the world via its course to the Gulf of Mexico . 
