Mississippi v. Arkansas

Mississippi, prompted by the pendency of private title litigation in the Arkansas courts,1 instituted this origi*290nal action against Arkansas in November 1970. The bill of complaint, which accompanied the motion for leave to file, prayed that the boundary line between the two States, in the old bed of the Mississippi River from the upstream end to the downstream end of Tarpley Cut-off, that is, the Spanish Moss Bend-Luna Bar-Carter Point area where Arkansas’ Chicot County and Mississippi’s Washington County adjoin, be fixed and determined.

The river was originally established as the boundary…