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(FOX 9) - The next legal challenge for a controversial mining project in northern Minnesota is underway.
The Minnesota Pollution Control Agency is under the microscope over its handling of a proposed copper-nickel mine in St. Louis County. In an evidentiary hearing Tuesday, officials closely examined state regulators' handling of a PolyMet permit.
Among a long list of complaints, the MPCA is accused of acting irregularly in awarding a water permit for the proposed copper-nickel mine near Babbit, Minn.
Opponents say the MPCA withheld a potentially damaging environmental report until after the public comment period was closed. It's now up to a judge to determine if the permit was properly approved.
The hearing came less than a week after an order by the Minnesota Federal Appeals Court.
The MPCA denies any wrongdoing.
PolyMet has faced a number of challenges in its quest to build the state's first copper-nickel mine, and it could be days before the hearing wraps up.