Mo. Rev. Stat. § 226.440

The "Mississippi River Parkway Commission of the State of Missouri" is hereby established to aid in the promotion and securement of federal parks and a scenic parkway and highway for the state of Missouri along the Mississippi River. The commission shall work toward the planning, construction, maintenance, and improvement of the Great River Road and Mississippi River Parkway which is to follow generally the course of the Mississippi River and extend from Canada to the Gulf of Mexico.