A state administrative law judge has recommended against the reissuance of a key permit for the proposed copper-nickel mine formerly known as PolyMet, another in a string of setbacks for the roughly $1 billion proposal in northeastern Minnesota.
In a non-binding opinion, an administrative law judge said adding bentonite clay to the mine-waste slurry and lining the tailings basin with bentonite was impractical and would not meet state law.
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