Mo. Rev. Stat. § 393.420
In any case where a part of an underground storage reservoir lies in or beneath lands (including the beds of navigable waters) of any public body, a gas storage company desiring to utilize the same for the underground storage of gas may acquire the right to do so, which right every such public body is hereby authorized to grant for such consideration as may be agreed upon with such gas storage company. In the event such gas storage company and such public body cannot agree upon such consideration, or in case there is no public authority other than the general assembly which has power to enter into such an agreement, then such gas storage company may acquire the right to utilize such part of such underground storage reservoir, but not, in such case, the surface of the lands under which such part of such reservoir lies, for the underground storage of gas, by proceeding in the same manner and with the same effect as in cases of condemnation under section 393.430, subject to the limitations and provisions in such cases provided, and in any such case to which the state of Missouri shall be made a party service of process may be had upon the attorney general. The term "public body" as used in this section means the state of Missouri, or any department, board, commission, bureau, institution, public agency or political subdivision thereof including municipal corporations and quasi-municipal corporations of all kinds.
§ 393.420, RSMo