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Houston County gave the Erickson Mine permission to start mining silica sand, but a 2013 law requires a DNR permit for mines if they are located near trout streams within an area known as the Paleozoic Plateau.
The EPA approved the state's water quality variance for Mesabi Nugget in 2012, allowing the facility to exceed water quality standards for four pollutants: hardness, bicarbonates, conductivity and total dissolved solids. But the EPA reversed itself earlier this month.
How to make the Vikings stadium more bird-friendly
Sharon Stiteler, who blogs at BirdChick.com, joined MPR News' Tom Crann to discuss the concerns of the Audubon Society about the new Vikings stadium and possible solutions.
Charting Minnesota's future water supply
The Legislature asked the Met Council to study possible solutions both to White Bear Lake's low water and to concerns about unsustainable groundwater pumping in the region.
Erosion exposes Enbridge oil pipelines near river in NW Minn.
Flooding has uncovered three of seven Enbridge Corporation pipelines that cross the river, pipes that largely carry crude oil from Canada across Minnesota. Although the pipelines generally are buried three to four feet below ground, in some places erosion has exposed them to the elements.
Lake of the Woods terns gamble wrong on 2014 floods
It wasn't a great year for the shoreline wildlife of Lake of the Woods. Flood waters from the saturated Rainy River watershed poured into the lake starting in June.
In Lake of the Woods, growing algae blooms puzzle scientists
Scientists don't yet know exactly how much blooms have expanded, but early findings suggest the algae is getting thicker, likely due to a combination of climate change and decades-old pollution.
Communities and individuals have been able to ask the DNR to spray moth-infested areas for 14 years. But the agency now wants to limit spraying to only state lands.
The Department of Health says "a small amount" may have entered an oxbow of Timber Creek approximately five miles northwest of Arnegard.