Wis. Stat. § 31.045: Permits for dams that affect drained lands.

(1) For the construction, raising or enlarging of a dam that will affect the water level in a drainage district organized under ch. 88, no person who obtains a permit under this chapter may construct, raise or enlarge the dam unless the person obtains the approval of the drainage board with jurisdiction of the drainage district.

(2) For the construction, raising or enlarging of a dam that will affect the water level in a drain, for an individual landowner, that is constructed under an order issued under s. 88.94, no person who obtains a permit under this chapter may construct, raise or enlarge the dam unless the person obtains the approval of the landowner.