Colo. Rev. Stat. § 37-5-114
All conservancy assessments provided for in articles 1 to 8 of this title, together with all interest thereon and all penalties for default in payment of the same and all costs in collecting the same, shall, from the date of filing the certificate of the preliminary fund assessment with the board of county commissioners, and the construction fund assessment record and maintenance fund assessment record, mentioned in this article, in the office of the treasurer of the county wherein the lands and properties are situated, until paid, constitute a perpetual lien on said lands and property on a parity with the tax lien for general state, county, city, town, or school taxes, and no sale of such land or property to enforce any general state, county, city, town, or school tax or other lien shall extinguish the perpetual lien of such assessments.
C.R.S. § 37-5-114