In 1998, Wisconsin enacted a mining moratorium. The law requires a company applying for a mining permit to prove that a similar mine has operated for 10 years and been closed for 10 years without the pollution of groundwater or surface water. The mine could be located anywhere in the U.S. or Canada. "We already have in place the statutory authority and technical ability to fairly judge any mining proposal on its merits. ... Moreover, we think the bill adds nothing to our understanding of environmental safety and provides no additional level of environmental protection."