Mo. Rev. Stat. § 236.010: Dams across nonnavigable streams — who may erect.

Any person or corporation chartered and organized to construct, operate and maintain mills, electric power and light works, or other machinery, may erect a dam across any watercourse, not being a navigable stream, if such person or corporation is the proprietor of the land through which the watercourse runs at the point where it is proposed to erect such dam, by proceeding as herein provided.