Wyo. Stat. § 41-9-253
All assessment provided for in chapter 76, Wyoming Compiled Statutes 1920, and acts amendatory thereto and supplemental thereof, together with all interest thereon, and all penalties for default in the payment of same, and all costs of collecting the same shall, from the date of the order of court confirming such assessments until paid, constitute a perpetual lien in amount not in excess of the benefits severally assessed, upon all the land and other property against which such assessments shall be levied, as provided in this act, to which only the lien of the state for general state, county, city, town or school taxes, shall be paramount, and no sale of such property to enforce any general state, county, municipal, or school tax, or other lien shall extinguish the lien of such assessments.
W.S. 41-9-253