McClellan–Kerr Arkansas River Navigation System
（重定向自Arkansas River Navigation System）
![Inland waterway system with McClellan-Kerr Navigation System shown in red.](/Images/godic/202412/21/Kerr-McClellan_map5553.png")
![Newt Graham Lock and Dam on the Verdigris River in Wagoner County, Oklahoma](/Images/godic/202412/21/USACE_Newt_Graham_Lock_and_Dam5553.jpg")
![Murray Lock and Dam in Little Rock, Arkansas](/Images/godic/202412/21/Big_Dam_Bridge5553.jpg")
![Murray Lock in Little Rock, Arkansas](/Images/godic/202412/21/Murray_Lock5553.jpg")
The McClellan–Kerr Arkansas River Navigation System (MKARNS) is part of the inland waterway system originating at the Tulsa Port of Catoosa and running southeast through Oklahoma and Arkansas to the Mississippi River. The system was named for two Senators: Robert S. Kerr (D-OK) and John L. McClellan (D-AR), who pushed authorizing legislation through Congress. The system officially opened June 5, 1971. President Richard M. Nixon attended the opening ceremony. It is operated by the Corps of Engineers.