MnDOT to shore up roads over mine shafts
Published 03/02/2009, Minnesota Public Radio
CHISHOLM, Minn. — Most people on the Iron Range know that iron mining used to be an underground adventure. Jason Richter knows that too. He’s the Department of Transportation’s engineering geologist in St. Paul. Two years ago he got a call from the MnDOT folks in Duluth.Word count: 652
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