Mo. Rev. Stat. § 256.360

The clean water commission is authorized to act in behalf of the state, as required by the federal government, to protect those public interests associated with federal reservoirs involving water use and water management authority not otherwise delegated to state of Missouri agencies by statute or constitution, and the commission, after public hearing and approval of the governor, may take such legal action as is necessary to protect those interests, except that, such action shall be limited only to requirements of congressional documents authorizing federal reservoir projects.