A Dane County judge has ruled the Department of Natural Resources can't backtrack from an earlier decision and must proceed with imposing environmental protections on a large dairy farm expansion. The ruling is the most recent example where the regulatory authority of the DNR has been called into question. The judge said the agency in this case had the power to place limits on farmers to protect public waters. The ruling is the most recent example where the regulatory authority of the DNR has been called into question. The judge said the agency in this case had the power to place limits on farmers to protect public waters. The issue is far from settled, and in this instance the owners of the farm say they might appeal the ruling.