The notice came after the Minnesota Pollution Control Agency denied U.S. Steel's request allowing downstream Hay Lake to have sulfate levels nearly 8 times higher than the state wild rice standard.
Ted Ozersky, a UMD associate biology professor and interim director of the Large Lakes Observatory, co-authored a review outlining the environmental and societal consequences of less lake ice.
Whether burned for energy or left in the forest to decompose, wood waste releases carbon dioxide. Supporters say it should be exempt from a law calling for carbon-free energy by 2040.
The Clyde S. VanEnkevort, an integrated tug and barge, spilled an estimated 373 gallons of red dye diesel into the lake near the Northshore Mining Co. pellet plant in Silver Bay on May 29.
The Minnesota Pollution Control Agency said diesel fuel overflowed from the Clyde S. VanEnkevort integrated tug and barge Wednesday as it transferred fuel between its components.
