DEQ hearing on Orvana mine project attracts local support.
It would directly fill in about 8,000 feet of streams and 60 acres of wetlands. This tailings pile would be at risk of leaching heavy metals and other contaminants into nearby creeks, ravines and groundwater -- and eventually into Lake Superior. Tailings piles can leach sulfuric acid and heavy metals for centuries.
Tailings basin concerns for Iron Range's MinnTac mine.
Jan 20, 2015 · The state will be looking closely at permit renewal plans at MinnTac in Mountain Iron, Minnesota, after the federal Environmental Protection Agency issued concerns recently that the tailings basin at Minnesota’s largest taconite mine inadequately filters runoff into area waters, including those that flow into Lake Superior and the Boundary Waters Canoe area.
EPA pushes state for tougher limits on Minntac's Iron.
EPA pushes state for tougher limits on Minntac's Iron Range waste pit, extending the life of the mine by 16 years. Its tailings basin, which holds waste rock and polluted water from decades of.
Apr 10, 2019 · By the late 1960s, however, the environmental impact of the burgeoning taconite industry was felt. Study groups and conferences were established to respond to fears that disposing of tailings into Lake Superior was polluting the lake, wildlife that lived in the environment, and subsequently the drinking water supply of nearby communities.
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