Wis. Admin. Code Department of Natural Resources NR 51.52
In addition to the definitions in s. NR 51.002, the following definition applies to this subchapter: "Wild lake" means a lake or flowage of at least 5 acres, or significant portions thereof, identified in the Wisconsin register of waterbodies, where human influence, such as structural development of its shorelands, is not significant or can be removed at costs deemed warranted by the department. If the waterbody is not found in the Wisconsin register of waterbodies database, department staff will make a determination on whether to add the waterbody to the register as a lake or flowage.
Wis. Admin. Code Department of Natural Resources NR 51.52
The fact that a lake is located in proximity to an urban area does not exclude it from the definition of wild lake.
The Wisconsin Register of Waterbodies, which is the state's official electronic database for identification of surface waters of the state, is maintained by the Bureau of Fisheries Management and is available for inspection at the department's offices at 101 S. Webster Street, Madison, and at DNR service centers.