Wis. Stat. § 86.22
Each corporation incorporated under the laws of this state and granted a franchise or permit by the U.S. congress to construct, maintain and operate a railroad bridge and provide for the passage of persons and vehicles across the waters forming a boundary line between this and any other state and to forever maintain the bridge in accessible and serviceable condition, shall construct or cause to be constructed, approaches making the bridge accessible and serviceable for the use of persons and vehicles as a connection between this state and the state connected therewith by the bridge, so that the bridge shall be accessible and serviceable to persons and vehicles at the time such bridge is used for railroad service, and if any such corporation fails or refuses to comply with this section within one year from the time the bridge is used for railroad service the charter of the corporation granted by this state shall thereupon be forfeited, as a result of the failure or refusal to comply with this section, without any further action whatever and the corporation shall forthwith discontinue the transaction or operation of its business in this state.
Wis. Stat. § 86.22