Mo. Rev. Stat. § 226.300

In order to carry out the requirements of an act of Congress of the United States heretofore or hereafter to be enacted, with respect to parkway areas within the state for a national Mississippi River Parkway, and to obtain the benefits thereof and of federal funds and aids for its construction, maintenance and administration to the fullest extent of state constitutional limitations, the following rights, powers and duties are hereby conferred upon the state transportation department and the following provisions of law are hereby enacted.