Section 30.25 - Wolf River protection(1) Except as provided under sub. (2), no person may make any effort to improve the navigation on the Wolf River north of the southern boundary of Shawano County nor shall any dam be authorized for construction in that portion of the Wolf River. Any permit issued or in effect by virtue of or under authority of any order or law authorizing the construction of any dam in the Wolf River in Langlade County is void. This declaration does not affect permits for or the operation or maintenance of any dam in existence on August 24, 1963.(2) A person may engage in a minor dredging project to improve access to or to improve the aesthetics of the Wolf River in Shawano County if a permit issued by the department under s. 30.20 authorizes the project.