Wis. Stat. § 82.09: County aid for dams used for bridges.

A town board may file a petition with the county board stating that the town board has voted to acquire the right to use a roadway on a dam. The petition shall contain a legal description and scale map of the dam and roadway, and shall state the amount agreed to be paid to the owner for the use of the roadway. Upon receipt of a petition, the county board shall appropriate a sum equal to 50 percent of the amount agreed to be paid for the use. The county board shall, on the order of the chairperson of the county board and county clerk, cause such sum to be paid to the treasurer of the town whenever the town board notifies the county highway commissioner that a contract for the use of the roadway has been executed.