Wyo. Stat. § 16-10-104: Formation of a surface water drainage utility.

Notwithstanding any other provision of law, a surface water drainage utility may be formed by the governing body of any city or town, or by the county in the unincorporated area of a county, as provided by this act, for all or a portion of the respective municipality by its governing body, or for all or a portion of the unincorporated area of a county by its governing body.