Mo. Rev. Stat. § 230.040
Before construction of any county highway located, laid out, and designated as in this chapter authorized and provided, or any money, in excess of the cost of such location and designation shall be expended thereon, it shall be the duty of county highway commission to submit such location to the state highways and transportation commission for its approval, and, upon approval of such location by the state highways and transportation commission, the county highway commission shall proceed to procure the right-of-way for said county highways, said right-of-way to be of the standard width required by the state highways and transportation commission for secondary highways, not less, however, than sixty feet wide, and secure title in fee to such right-of-way by deed of conveyance, or by judgment of a court of competent jurisdiction through condemnation. In all cases where condemnation is necessary, the proceedings shall be in the name of the county highway commission, and otherwise the same as now, or hereafter, provided by law for condemnation of land by the state highways and transportation commission for right-of-way for state highways.
§ 230.040, RSMo