Wis. Stat. § 66.1033: Curative provisions.

(1) In this section:

(a) “Political subdivision” means a city, village, town, or county.

(b) “Public way” means a highway, street, slip, pier, or alley.

(2) For proceedings taken, or for plats, deeds, orders, or resolutions executed before January 1, 2005, notwithstanding s. 840.11, no defect, omission or informality in the proceedings of, or execution of a plat, deed of dedication, order, or resolution by, a political subdivision shall affect or invalidate the proceedings, plat, deed, order, or resolution after 5 years from the date of the proceeding, plat, deed, order, or resolution. The public way dedicated, laid out, or altered by a defective or informal proceeding, plat, deed, order, or resolution shall be limited in length to the portion actually worked and used.

(3) For proceedings taken, or for plats, deeds, orders, or resolutions executed after January 1, 2005, except as provided in s. 840.11, no defect, omission, or informality in the proceedings of, or execution of a plat, deed of dedication, order, or resolution by, a political subdivision shall affect or invalidate the proceedings, plat, deed, order, or resolution after 5 years from the date of the proceedings, plat, deed, order, or resolution. The public way dedicated, laid out, or altered by a defective or informal proceeding, plat, deed, order, or resolution shall be limited in length to the portion actually worked and used.