Mo. Rev. Stat. § 71.520
Any city, town or village in this state may by ordinance authorize any person, or any company organized for the purpose of supplying light, heat, power, water, gas or sewage disposal facilities, and incorporated under the laws of this state, to set and maintain its poles, piers, abutments, wires and other fixtures, and to excavate for, install, and maintain water mains, sewage disposal lines, and necessary equipment for the operation and maintenance of electric light plants, heating plants, power plants, waterworks plants, gas plants and sewage disposal plants, and to maintain and operate the same along, across or under any of the public roads, streets, alleys, or public places within such city, town, or village, for a period of twenty years or less, subject to such rules, regulations and conditions as shall be expressed in such ordinance.
§ 71.520, RSMo