Wis. Stat. § 32.16: Abandonment of easements for public use.

An easement for public use acquired by gift or purchase or by condemnation under this subchapter shall not be deemed abandoned on the grounds of nonuser thereof for any period less than that prescribed in the applicable statutes of limitations in ch. 893. Nothing contained in this section shall be presumed to adversely affect any highway right possessed by the state or any county or municipality thereof.