Wis. Stat. § 192.36: Fences, occupant of land may build or repair.

(1) Whenever a railroad corporation fails to build or repair any fence, which the law requires it to erect, the owner or occupant of the land adjoining may, between April 1 and October 1, give notice in writing to the railroad corporation to build the fence within 60 days, or repair the fence within 30 days, after service of the notice.

(2) The notice under sub. (1) shall describe the land on which the fence is required to be built or repaired. Service of the notice may be made by delivering the notice to any station agent of the railroad corporation.

(3) In case the railroad corporation fails to build or repair the fence within the required time, the owner or occupant of the adjoining land may build or repair the fence and recover from the railroad corporation the cost of building or repairing with interest at the rate of 1 percent per month from the time that the fence shall have been built or repaired.