Mo. Rev. Stat. § 234.100
Any city organized under general law, or under special charter, or under Section 19 of Article VI of the Constitution of this State, and adjoining a navigable stream and separated by such stream from a county of this state adjoining said stream opposite said city, and the county commission of any such county, may unite in purchasing, for a free public highway for travel between such city and such county by wagons, vehicles, footmen and animals right-of-way over any bridge or bridges crossing such stream and connecting such city and such county and being maintained and used as a toll bridge for wagons, vehicles, footmen, passengers and animals, and for other purposes, or in contracting with any holder of a franchise; for construction of a proposed bridge across such stream and to connect such city and such county, and for maintenance of such bridge as a toll bridge for wagons, vehicles, foot passengers and animals, and for other purposes, for the purchase, upon completion of such proposed bridge, of right-of-way thereon for a free public highway for travel between such city and such county by wagons, vehicles, footmen and animals; the cost of any right-of-way so purchased or contracted for to be defrayed by such city and such county, each paying such portion thereof as may be agreed upon between such city and such county commission; and whenever the owner of any such bridge shall in writing propose to sell such a right-of-way over such bridge, or the holder of any such franchise shall propose to contract with any such city and county for the sale, upon completion of the proposed bridge, of such a right-of-way thereon, said county commission shall appoint a commission, composed of the county surveyor or highway engineer, and two owners of real estate in the county, who shall confer with the mayor or other chief officer of such city and the owner of such bridge or the holder of such franchise, and ascertain and report to the county commission the price for which such right-of-way can be purchased or contracted for, and whether such price is reasonable, and the portion of such price that such city proposes to pay; which report shall be filed with such county commission, and if such price is for right-of-way over such a proposed bridge, such committee shall procure and file with such report a copy of the plans for such proposed bridge.
§ 234.100, RSMo